Area to Diameter Calculator

Convert circle area into diameter, radius, circumference, and useful engineering values accurately. Use precise units, clear steps, batch tools, diagrams, and downloadable reports online.

Enter Circle Measurements

Use decimals, commas, or scientific notation.
Batch Calculation Options
The first 1,000 valid values are processed.
Pipe and Engineering Options
Nominal pipe sizes are references. Verify actual standards before design use.
Display and Accessibility Options

Interactive Circle Diagram

DiameterCalculated across the center.
RadiusHalf of the diameter.
AreaSurface inside the circle.
CircumferenceDistance around the boundary.

Quick Example Presets

Formula Used

AreaA = πr²
Radius From Arear = √(A ÷ π)
Diameter From Aread = 2√(A ÷ π)
CircumferenceC = 2√(πA)
Area From DiameterA = π(d ÷ 2)²
Diameter From Circumferenced = C ÷ π

Important Conversion Rule

Area conversions use squared length factors. Linear factors cannot be reused directly.

area in m² = entered area × selected area factor
diameter in output units = diameter in meters ÷ output factor

How to Use This Calculator

  1. Select the calculation mode that matches your known value.
  2. Enter the measurement using any supported numeric format.
  3. Choose the correct input and output measurement units.
  4. Set precision, notation, tolerance, and pi preferences.
  5. Open batch or engineering options when they are needed.
  6. Press calculate and review every displayed conversion step.
  7. Copy, print, share, or export the finished result.

Example Data Table

AreaRadiusDiameterCircumference
1 cm² 0.5642 cm 1.1284 cm 3.5449 cm
10 cm² 1.7841 cm 3.5682 cm 11.21 cm
25 cm² 2.8209 cm 5.6419 cm 17.7245 cm
50 cm² 3.9894 cm 7.9788 cm 25.0663 cm
78.54 cm² 5 cm 10 cm 31.416 cm
100 cm² 5.6419 cm 11.2838 cm 35.4491 cm
250 cm² 8.9206 cm 17.8412 cm 56.0499 cm
500 cm² 12.6157 cm 25.2313 cm 79.2665 cm
1000 cm² 17.8412 cm 35.6825 cm 112.0998 cm

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Recent History

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Measurement Glossary

Area

Surface enclosed by the complete circular boundary.

Radius

Distance from the center to the circle edge.

Diameter

Straight distance across the center between opposite edges.

Circumference

Total distance around the outside circular boundary.

Pi

Constant ratio between circumference and diameter.

Tolerance

Allowed measurement variation around a target value.

Annular Area

Area between two circles sharing one center.

Hydraulic Diameter

Equivalent diameter used when analyzing fluid passages.

Nominal Size

Named reference size that may differ from measurement.

Circle Measurement Guide

Understanding Circular Area

Circular measurements appear in engineering, construction, crafts, and everyday planning. Area describes the surface enclosed by a complete circle. Diameter measures the straight distance across the circle center. These values connect through radius and the constant pi. Knowing area allows the diameter to be recovered accurately. The calculation first divides area by the selected pi value. Next, the square root returns the circle radius. Doubling that radius produces the final diameter measurement. Correct units remain essential throughout every conversion step. Square units cannot use ordinary linear conversion factors directly.

How Diameter Is Recovered

Each length conversion factor must be squared for area. This calculator handles that important difference automatically. Metric inputs include millimeters, centimeters, meters, and kilometers. Imperial inputs include inches, feet, yards, and miles. Land units include acres and hectares for larger circles. Custom factors support specialized manufacturing or scientific measurement systems. Users may choose any supported output length unit. The result panel displays diameter, radius, and circumference together. Exact expressions preserve pi when decimal rounding is undesirable. Approximate values provide practical measurements for immediate use.

Units and Precision

Precision controls reduce unwanted digits in displayed results. Scientific notation improves readability for extremely large values. Engineering notation keeps exponents grouped in useful multiples. Fractional inches assist fabrication, woodworking, and field measurements. Batch processing converts many area values during one calculation. Pasted spreadsheet values work without manual reentry or repetition. CSV uploads also support larger measurement lists efficiently. Every batch result can be copied or downloaded afterward. A visual circle diagram updates when calculation values change. The drawing marks radius, diameter, center, and measured area.

Batch Tools and Visuals

Scaled graphics improve understanding without replacing numerical accuracy. History storage restores recent calculations inside the same browser. Saved favorites help users revisit important design dimensions quickly. Shareable links preserve selected values and calculator settings. Printed reports provide useful records for projects and inspections. CSV exports integrate easily with common spreadsheet applications. Simple PDF reports summarize values, formulas, and calculation steps. Engineering controls support pipe openings and circular flow sections. Wall thickness can estimate related internal or external diameters. Annular calculations compare outer and inner circular boundaries.

Engineering Uses

Tolerance inputs estimate practical minimum and maximum diameters. Such ranges matter when materials or measurements vary slightly. Validation blocks negative areas because physical area cannot be negative. Zero area returns zero diameter without creating undefined values. Clear warnings explain missing entries and unsupported number formats. Examples help students understand formulas before entering custom data. Preset values demonstrate coins, plates, pipes, gardens, and tanks. Comparison tables reveal how diameter grows with increasing area. Diameter grows by the square root, not proportionally with area. Four times the area produces twice the original diameter.

Reliable Measurement Practice

This relationship helps estimate changes before exact calculations. Always confirm whether a provided measurement represents area or circumference. Confusing those quantities creates dramatically incorrect diameter results. Also verify whether the source uses internal or external dimensions. Pipe specifications often distinguish nominal sizes from measured diameters.

Frequently Asked Questions

How do you find diameter from area?

Divide area by pi. Take the square root. Double that result.

Can area convert directly into diameter?

Yes. The calculator combines the required inverse operations automatically.

Why is the square root used?

Area contains a squared radius. Reversing that square requires its root.

What happens when area is zero?

Radius, diameter, and circumference all become zero.

Can the calculator use square feet?

Yes. Select square feet, then choose any output length unit.

How do square inches become diameter?

The calculator converts square inches before applying the circle formula.

Is diameter twice the radius?

Yes. This relationship remains true for every circle.

Can this calculate pipe diameter?

Yes. Enable engineering options for pipe related estimates.

How accurate are the results?

Full precision is retained until the selected display rounding occurs.

Does changing units change diameter?

The physical size stays equal. Only the displayed numeric value changes.

Can multiple areas be calculated together?

Yes. Batch mode accepts pasted lists and CSV values.

JSON Endpoint

Add api=1 to a result link. The calculator returns structured JSON.

https://codingace.com/calc/maths/reflect_over_y_axis.html?api=1&mode=area_to_diameter&input_value=78.54&area_unit=cm2&output_unit=cm

Extended Reference Library

This large reference collection supports testing, comparison, and training.

ReferenceAreaDiameterRadiusCircumference
Reference 1 0.75 m² 0.977205 m 0.488603 m 3.06998 m
Reference 2 1.5 m² 1.381977 m 0.690988 m 4.341608 m
Reference 3 2.25 m² 1.692569 m 0.846284 m 5.317362 m
Reference 4 3 m² 1.95441 m 0.977205 m 6.13996 m
Reference 5 3.75 m² 2.185097 m 1.092548 m 6.864684 m
Reference 6 4.5 m² 2.393654 m 1.196827 m 7.519885 m
Reference 7 5.25 m² 2.585441 m 1.292721 m 8.122404 m
Reference 8 6 m² 2.763953 m 1.381977 m 8.683215 m
Reference 9 6.75 m² 2.931615 m 1.465808 m 9.20994 m
Reference 10 7.5 m² 3.090194 m 1.545097 m 9.70813 m
Reference 11 8.25 m² 3.241022 m 1.620511 m 10.181972 m
Reference 12 9 m² 3.385138 m 1.692569 m 10.634723 m
Reference 13 9.75 m² 3.523363 m 1.761681 m 11.068971 m
Reference 14 10.5 m² 3.656366 m 1.828183 m 11.486814 m
Reference 15 11.25 m² 3.784699 m 1.892349 m 11.889982 m
Reference 16 12 m² 3.90882 m 1.95441 m 12.27992 m
Reference 17 12.75 m² 4.02912 m 2.01456 m 12.657852 m
Reference 18 13.5 m² 4.14593 m 2.072965 m 13.024823 m
Reference 19 14.25 m² 4.259538 m 2.129769 m 13.381733 m
Reference 20 15 m² 4.370194 m 2.185097 m 13.729368 m
Reference 21 15.75 m² 4.478116 m 2.239058 m 14.068416 m
Reference 22 16.5 m² 4.583498 m 2.291749 m 14.399483 m
Reference 23 17.25 m² 4.686511 m 2.343255 m 14.723107 m
Reference 24 18 m² 4.787307 m 2.393654 m 15.03977 m
Reference 25 18.75 m² 4.886025 m 2.443013 m 15.349901 m
Reference 26 19.5 m² 4.982787 m 2.491394 m 15.653889 m
Reference 27 20.25 m² 5.077706 m 2.538853 m 15.952085 m
Reference 28 21 m² 5.170883 m 2.585441 m 16.244808 m
Reference 29 21.75 m² 5.26241 m 2.631205 m 16.532349 m
Reference 30 22.5 m² 5.352372 m 2.676186 m 16.814974 m
Reference 31 23.25 m² 5.440847 m 2.720424 m 17.092926 m
Reference 32 24 m² 5.527906 m 2.763953 m 17.36643 m
Reference 33 24.75 m² 5.613615 m 2.806808 m 17.635693 m
Reference 34 25.5 m² 5.698035 m 2.849018 m 17.900906 m
Reference 35 26.25 m² 5.781223 m 2.890611 m 18.162247 m
Reference 36 27 m² 5.86323 m 2.931615 m 18.419881 m
Reference 37 27.75 m² 5.944106 m 2.972053 m 18.67396 m
Reference 38 28.5 m² 6.023896 m 3.011948 m 18.924628 m
Reference 39 29.25 m² 6.102643 m 3.051322 m 19.17202 m
Reference 40 30 m² 6.180387 m 3.090194 m 19.416259 m
Reference 41 30.75 m² 6.257165 m 3.128583 m 19.657464 m
Reference 42 31.5 m² 6.333012 m 3.166506 m 19.895745 m
Reference 43 32.25 m² 6.407962 m 3.203981 m 20.131206 m
Reference 44 33 m² 6.482045 m 3.241022 m 20.363944 m
Reference 45 33.75 m² 6.555291 m 3.277645 m 20.594053 m
Reference 46 34.5 m² 6.627727 m 3.313863 m 20.821618 m
Reference 47 35.25 m² 6.69938 m 3.34969 m 21.046723 m
Reference 48 36 m² 6.770275 m 3.385138 m 21.269446 m
Reference 49 36.75 m² 6.840435 m 3.420218 m 21.489861 m
Reference 50 37.5 m² 6.909883 m 3.454941 m 21.708038 m
Reference 51 38.25 m² 6.97864 m 3.48932 m 21.924043 m
Reference 52 39 m² 7.046726 m 3.523363 m 22.137942 m
Reference 53 39.75 m² 7.11416 m 3.55708 m 22.349793 m
Reference 54 40.5 m² 7.180961 m 3.590481 m 22.559654 m
Reference 55 41.25 m² 7.247146 m 3.623573 m 22.767582 m
Reference 56 42 m² 7.312733 m 3.656366 m 22.973628 m
Reference 57 42.75 m² 7.377736 m 3.688868 m 23.177842 m
Reference 58 43.5 m² 7.442172 m 3.721086 m 23.380272 m
Reference 59 44.25 m² 7.506054 m 3.753027 m 23.580965 m
Reference 60 45 m² 7.569398 m 3.784699 m 23.779964 m
Reference 61 45.75 m² 7.632215 m 3.816108 m 23.977311 m
Reference 62 46.5 m² 7.69452 m 3.84726 m 24.173048 m
Reference 63 47.25 m² 7.756324 m 3.878162 m 24.367212 m
Reference 64 48 m² 7.81764 m 3.90882 m 24.559841 m
Reference 65 48.75 m² 7.878479 m 3.939239 m 24.750971 m
Reference 66 49.5 m² 7.938851 m 3.969426 m 24.940636 m
Reference 67 50.25 m² 7.998768 m 3.999384 m 25.12887 m
Reference 68 51 m² 8.058239 m 4.02912 m 25.315705 m
Reference 69 51.75 m² 8.117275 m 4.058637 m 25.50117 m
Reference 70 52.5 m² 8.175884 m 4.087942 m 25.685297 m
Reference 71 53.25 m² 8.234076 m 4.117038 m 25.868112 m
Reference 72 54 m² 8.29186 m 4.14593 m 26.049645 m
Reference 73 54.75 m² 8.349243 m 4.174622 m 26.229922 m
Reference 74 55.5 m² 8.406235 m 4.203118 m 26.408968 m
Reference 75 56.25 m² 8.462844 m 4.231422 m 26.586808 m
Reference 76 57 m² 8.519076 m 4.259538 m 26.763466 m
Reference 77 57.75 m² 8.574939 m 4.28747 m 26.938966 m
Reference 78 58.5 m² 8.630441 m 4.315221 m 27.11333 m
Reference 79 59.25 m² 8.685588 m 4.342794 m 27.28658 m
Reference 80 60 m² 8.740387 m 4.370194 m 27.458737 m
Reference 81 60.75 m² 8.794845 m 4.397423 m 27.629821 m
Reference 82 61.5 m² 8.848968 m 4.424484 m 27.799852 m
Reference 83 62.25 m² 8.902761 m 4.451381 m 27.96885 m
Reference 84 63 m² 8.956232 m 4.478116 m 28.136833 m
Reference 85 63.75 m² 9.009385 m 4.504693 m 28.303818 m
Reference 86 64.5 m² 9.062227 m 4.531113 m 28.469824 m
Reference 87 65.25 m² 9.114762 m 4.557381 m 28.634868 m
Reference 88 66 m² 9.166996 m 4.583498 m 28.798966 m
Reference 89 66.75 m² 9.218934 m 4.609467 m 28.962135 m
Reference 90 67.5 m² 9.270581 m 4.63529 m 29.124389 m
Reference 91 68.25 m² 9.321942 m 4.660971 m 29.285744 m
Reference 92 69 m² 9.373021 m 4.686511 m 29.446215 m
Reference 93 69.75 m² 9.423824 m 4.711912 m 29.605816 m
Reference 94 70.5 m² 9.474354 m 4.737177 m 29.764562 m
Reference 95 71.25 m² 9.524616 m 4.762308 m 29.922465 m
Reference 96 72 m² 9.574615 m 4.787307 m 30.079539 m
Reference 97 72.75 m² 9.624353 m 4.812177 m 30.235798 m
Reference 98 73.5 m² 9.673836 m 4.836918 m 30.391253 m
Reference 99 74.25 m² 9.723067 m 4.861534 m 30.545917 m
Reference 100 75 m² 9.77205 m 4.886025 m 30.699801 m
Reference 101 75.75 m² 9.820789 m 4.910394 m 30.852918 m
Reference 102 76.5 m² 9.869287 m 4.934643 m 31.005279 m
Reference 103 77.25 m² 9.917548 m 4.958774 m 31.156895 m
Reference 104 78 m² 9.965575 m 4.982787 m 31.307777 m
Reference 105 78.75 m² 10.013372 m 5.006686 m 31.457935 m
Reference 106 79.5 m² 10.060941 m 5.030471 m 31.60738 m
Reference 107 80.25 m² 10.108287 m 5.054144 m 31.756121 m
Reference 108 81 m² 10.155413 m 5.077706 m 31.904169 m
Reference 109 81.75 m² 10.20232 m 5.10116 m 32.051533 m
Reference 110 82.5 m² 10.249013 m 5.124506 m 32.198223 m
Reference 111 83.25 m² 10.295494 m 5.147747 m 32.344248 m
Reference 112 84 m² 10.341766 m 5.170883 m 32.489616 m
Reference 113 84.75 m² 10.387832 m 5.193916 m 32.634336 m
Reference 114 85.5 m² 10.433695 m 5.216847 m 32.778418 m
Reference 115 86.25 m² 10.479356 m 5.239678 m 32.921869 m
Reference 116 87 m² 10.52482 m 5.26241 m 33.064698 m
Reference 117 87.75 m² 10.570088 m 5.285044 m 33.206912 m
Reference 118 88.5 m² 10.615164 m 5.307582 m 33.34852 m
Reference 119 89.25 m² 10.660048 m 5.330024 m 33.489529 m
Reference 120 90 m² 10.704745 m 5.352372 m 33.629947 m
Reference 121 90.75 m² 10.749255 m 5.374628 m 33.769781 m
Reference 122 91.5 m² 10.793582 m 5.396791 m 33.909039 m
Reference 123 92.25 m² 10.837728 m 5.418864 m 34.047727 m
Reference 124 93 m² 10.881695 m 5.440847 m 34.185852 m
Reference 125 93.75 m² 10.925484 m 5.462742 m 34.323421 m
Reference 126 94.5 m² 10.969099 m 5.48455 m 34.460441 m
Reference 127 95.25 m² 11.012541 m 5.506271 m 34.596919 m
Reference 128 96 m² 11.055813 m 5.527906 m 34.73286 m
Reference 129 96.75 m² 11.098916 m 5.549458 m 34.868271 m
Reference 130 97.5 m² 11.141852 m 5.570926 m 35.003159 m
Reference 131 98.25 m² 11.184623 m 5.592311 m 35.137529 m
Reference 132 99 m² 11.227231 m 5.613615 m 35.271386 m
Reference 133 99.75 m² 11.269678 m 5.634839 m 35.404738 m
Reference 134 100.5 m² 11.311966 m 5.655983 m 35.537589 m
Reference 135 101.25 m² 11.354096 m 5.677048 m 35.669946 m
Reference 136 102 m² 11.396071 m 5.698035 m 35.801813 m
Reference 137 102.75 m² 11.437892 m 5.718946 m 35.933196 m
Reference 138 103.5 m² 11.47956 m 5.73978 m 36.064101 m
Reference 139 104.25 m² 11.521077 m 5.760539 m 36.194532 m
Reference 140 105 m² 11.562446 m 5.781223 m 36.324495 m
Reference 141 105.75 m² 11.603667 m 5.801833 m 36.453994 m
Reference 142 106.5 m² 11.644742 m 5.822371 m 36.583035 m
Reference 143 107.25 m² 11.685672 m 5.842836 m 36.711623 m
Reference 144 108 m² 11.72646 m 5.86323 m 36.839761 m
Reference 145 108.75 m² 11.767107 m 5.883553 m 36.967456 m
Reference 146 109.5 m² 11.807613 m 5.903807 m 37.094711 m
Reference 147 110.25 m² 11.847981 m 5.923991 m 37.221531 m
Reference 148 111 m² 11.888212 m 5.944106 m 37.34792 m
Reference 149 111.75 m² 11.928307 m 5.964154 m 37.473883 m
Reference 150 112.5 m² 11.968268 m 5.984134 m 37.599424 m
Reference 151 113.25 m² 12.008096 m 6.004048 m 37.724547 m
Reference 152 114 m² 12.047793 m 6.023896 m 37.849257 m
Reference 153 114.75 m² 12.087359 m 6.043679 m 37.973557 m
Reference 154 115.5 m² 12.126795 m 6.063398 m 38.097451 m
Reference 155 116.25 m² 12.166104 m 6.083052 m 38.220944 m
Reference 156 117 m² 12.205287 m 6.102643 m 38.344039 m
Reference 157 117.75 m² 12.244344 m 6.122172 m 38.466741 m
Reference 158 118.5 m² 12.283277 m 6.141638 m 38.589052 m
Reference 159 119.25 m² 12.322086 m 6.161043 m 38.710976 m
Reference 160 120 m² 12.360774 m 6.180387 m 38.832518 m

Extended Worked Examples

These examples provide varied inputs for learning and quality checks.

ExampleApplicationAreaDiameterFormula
Worked Example 1 Pipe Opening 1.625 cm² 1.43841 cm d = 2√(A ÷ π)
Worked Example 2 Circular Plate 3 cm² 1.95441 cm d = 2√(A ÷ π)
Worked Example 3 Garden Bed 4.375 cm² 2.36017 cm d = 2√(A ÷ π)
Worked Example 4 Tank Base 5.75 cm² 2.70576 cm d = 2√(A ÷ π)
Worked Example 5 Duct Section 7.125 cm² 3.01195 cm d = 2√(A ÷ π)
Worked Example 6 Machined Bore 8.5 cm² 3.28976 cm d = 2√(A ÷ π)
Worked Example 7 Cable Section 9.875 cm² 3.54588 cm d = 2√(A ÷ π)
Worked Example 8 Round Table 11.25 cm² 3.7847 cm d = 2√(A ÷ π)
Worked Example 9 Pizza Surface 12.625 cm² 4.00932 cm d = 2√(A ÷ π)
Worked Example 10 Inspection Sample 14 cm² 4.22201 cm d = 2√(A ÷ π)
Worked Example 11 Pipe Opening 15.375 cm² 4.42448 cm d = 2√(A ÷ π)
Worked Example 12 Circular Plate 16.75 cm² 4.61809 cm d = 2√(A ÷ π)
Worked Example 13 Garden Bed 18.125 cm² 4.8039 cm d = 2√(A ÷ π)
Worked Example 14 Tank Base 19.5 cm² 4.98279 cm d = 2√(A ÷ π)
Worked Example 15 Duct Section 20.875 cm² 5.15547 cm d = 2√(A ÷ π)
Worked Example 16 Machined Bore 22.25 cm² 5.32255 cm d = 2√(A ÷ π)
Worked Example 17 Cable Section 23.625 cm² 5.48455 cm d = 2√(A ÷ π)
Worked Example 18 Round Table 25 cm² 5.6419 cm d = 2√(A ÷ π)
Worked Example 19 Pizza Surface 26.375 cm² 5.79497 cm d = 2√(A ÷ π)
Worked Example 20 Inspection Sample 27.75 cm² 5.94411 cm d = 2√(A ÷ π)
Worked Example 21 Pipe Opening 29.125 cm² 6.08959 cm d = 2√(A ÷ π)
Worked Example 22 Circular Plate 30.5 cm² 6.23168 cm d = 2√(A ÷ π)
Worked Example 23 Garden Bed 31.875 cm² 6.3706 cm d = 2√(A ÷ π)
Worked Example 24 Tank Base 33.25 cm² 6.50655 cm d = 2√(A ÷ π)
Worked Example 25 Duct Section 34.625 cm² 6.63972 cm d = 2√(A ÷ π)
Worked Example 26 Machined Bore 36 cm² 6.77028 cm d = 2√(A ÷ π)
Worked Example 27 Cable Section 37.375 cm² 6.89836 cm d = 2√(A ÷ π)
Worked Example 28 Round Table 38.75 cm² 7.0241 cm d = 2√(A ÷ π)
Worked Example 29 Pizza Surface 40.125 cm² 7.14764 cm d = 2√(A ÷ π)
Worked Example 30 Inspection Sample 41.5 cm² 7.26907 cm d = 2√(A ÷ π)
Worked Example 31 Pipe Opening 42.875 cm² 7.38851 cm d = 2√(A ÷ π)
Worked Example 32 Circular Plate 44.25 cm² 7.50605 cm d = 2√(A ÷ π)
Worked Example 33 Garden Bed 45.625 cm² 7.62178 cm d = 2√(A ÷ π)
Worked Example 34 Tank Base 47 cm² 7.73578 cm d = 2√(A ÷ π)
Worked Example 35 Duct Section 48.375 cm² 7.84812 cm d = 2√(A ÷ π)
Worked Example 36 Machined Bore 49.75 cm² 7.95887 cm d = 2√(A ÷ π)
Worked Example 37 Cable Section 51.125 cm² 8.06811 cm d = 2√(A ÷ π)
Worked Example 38 Round Table 52.5 cm² 8.17588 cm d = 2√(A ÷ π)
Worked Example 39 Pizza Surface 53.875 cm² 8.28226 cm d = 2√(A ÷ π)
Worked Example 40 Inspection Sample 55.25 cm² 8.38728 cm d = 2√(A ÷ π)
Worked Example 41 Pipe Opening 56.625 cm² 8.49101 cm d = 2√(A ÷ π)
Worked Example 42 Circular Plate 58 cm² 8.59348 cm d = 2√(A ÷ π)
Worked Example 43 Garden Bed 59.375 cm² 8.69475 cm d = 2√(A ÷ π)
Worked Example 44 Tank Base 60.75 cm² 8.79485 cm d = 2√(A ÷ π)
Worked Example 45 Duct Section 62.125 cm² 8.89382 cm d = 2√(A ÷ π)
Worked Example 46 Machined Bore 63.5 cm² 8.9917 cm d = 2√(A ÷ π)
Worked Example 47 Cable Section 64.875 cm² 9.08853 cm d = 2√(A ÷ π)
Worked Example 48 Round Table 66.25 cm² 9.18434 cm d = 2√(A ÷ π)
Worked Example 49 Pizza Surface 67.625 cm² 9.27916 cm d = 2√(A ÷ π)
Worked Example 50 Inspection Sample 69 cm² 9.37302 cm d = 2√(A ÷ π)
Worked Example 51 Pipe Opening 70.375 cm² 9.46595 cm d = 2√(A ÷ π)
Worked Example 52 Circular Plate 71.75 cm² 9.55798 cm d = 2√(A ÷ π)
Worked Example 53 Garden Bed 73.125 cm² 9.64913 cm d = 2√(A ÷ π)
Worked Example 54 Tank Base 74.5 cm² 9.73942 cm d = 2√(A ÷ π)
Worked Example 55 Duct Section 75.875 cm² 9.82889 cm d = 2√(A ÷ π)
Worked Example 56 Machined Bore 77.25 cm² 9.91755 cm d = 2√(A ÷ π)
Worked Example 57 Cable Section 78.625 cm² 10.00542 cm d = 2√(A ÷ π)
Worked Example 58 Round Table 80 cm² 10.09253 cm d = 2√(A ÷ π)
Worked Example 59 Pizza Surface 81.375 cm² 10.17889 cm d = 2√(A ÷ π)
Worked Example 60 Inspection Sample 82.75 cm² 10.26453 cm d = 2√(A ÷ π)
Worked Example 61 Pipe Opening 84.125 cm² 10.34946 cm d = 2√(A ÷ π)
Worked Example 62 Circular Plate 85.5 cm² 10.43369 cm d = 2√(A ÷ π)
Worked Example 63 Garden Bed 86.875 cm² 10.51726 cm d = 2√(A ÷ π)
Worked Example 64 Tank Base 88.25 cm² 10.60016 cm d = 2√(A ÷ π)
Worked Example 65 Duct Section 89.625 cm² 10.68242 cm d = 2√(A ÷ π)
Worked Example 66 Machined Bore 91 cm² 10.76405 cm d = 2√(A ÷ π)
Worked Example 67 Cable Section 92.375 cm² 10.84507 cm d = 2√(A ÷ π)
Worked Example 68 Round Table 93.75 cm² 10.92548 cm d = 2√(A ÷ π)
Worked Example 69 Pizza Surface 95.125 cm² 11.00531 cm d = 2√(A ÷ π)
Worked Example 70 Inspection Sample 96.5 cm² 11.08457 cm d = 2√(A ÷ π)
Worked Example 71 Pipe Opening 97.875 cm² 11.16326 cm d = 2√(A ÷ π)
Worked Example 72 Circular Plate 99.25 cm² 11.2414 cm d = 2√(A ÷ π)
Worked Example 73 Garden Bed 100.625 cm² 11.319 cm d = 2√(A ÷ π)
Worked Example 74 Tank Base 102 cm² 11.39607 cm d = 2√(A ÷ π)
Worked Example 75 Duct Section 103.375 cm² 11.47263 cm d = 2√(A ÷ π)
Worked Example 76 Machined Bore 104.75 cm² 11.54867 cm d = 2√(A ÷ π)
Worked Example 77 Cable Section 106.125 cm² 11.62422 cm d = 2√(A ÷ π)
Worked Example 78 Round Table 107.5 cm² 11.69928 cm d = 2√(A ÷ π)
Worked Example 79 Pizza Surface 108.875 cm² 11.77387 cm d = 2√(A ÷ π)
Worked Example 80 Inspection Sample 110.25 cm² 11.84798 cm d = 2√(A ÷ π)
Worked Example 81 Pipe Opening 111.625 cm² 11.92163 cm d = 2√(A ÷ π)
Worked Example 82 Circular Plate 113 cm² 11.99484 cm d = 2√(A ÷ π)
Worked Example 83 Garden Bed 114.375 cm² 12.06759 cm d = 2√(A ÷ π)
Worked Example 84 Tank Base 115.75 cm² 12.13991 cm d = 2√(A ÷ π)
Worked Example 85 Duct Section 117.125 cm² 12.21181 cm d = 2√(A ÷ π)
Worked Example 86 Machined Bore 118.5 cm² 12.28328 cm d = 2√(A ÷ π)
Worked Example 87 Cable Section 119.875 cm² 12.35433 cm d = 2√(A ÷ π)
Worked Example 88 Round Table 121.25 cm² 12.42499 cm d = 2√(A ÷ π)
Worked Example 89 Pizza Surface 122.625 cm² 12.49524 cm d = 2√(A ÷ π)
Worked Example 90 Inspection Sample 124 cm² 12.5651 cm d = 2√(A ÷ π)
Worked Example 91 Pipe Opening 125.375 cm² 12.63457 cm d = 2√(A ÷ π)
Worked Example 92 Circular Plate 126.75 cm² 12.70367 cm d = 2√(A ÷ π)
Worked Example 93 Garden Bed 128.125 cm² 12.77238 cm d = 2√(A ÷ π)
Worked Example 94 Tank Base 129.5 cm² 12.84074 cm d = 2√(A ÷ π)
Worked Example 95 Duct Section 130.875 cm² 12.90873 cm d = 2√(A ÷ π)
Worked Example 96 Machined Bore 132.25 cm² 12.97636 cm d = 2√(A ÷ π)
Worked Example 97 Cable Section 133.625 cm² 13.04364 cm d = 2√(A ÷ π)
Worked Example 98 Round Table 135 cm² 13.11058 cm d = 2√(A ÷ π)
Worked Example 99 Pizza Surface 136.375 cm² 13.17718 cm d = 2√(A ÷ π)
Worked Example 100 Inspection Sample 137.75 cm² 13.24344 cm d = 2√(A ÷ π)
Worked Example 101 Pipe Opening 139.125 cm² 13.30937 cm d = 2√(A ÷ π)
Worked Example 102 Circular Plate 140.5 cm² 13.37498 cm d = 2√(A ÷ π)
Worked Example 103 Garden Bed 141.875 cm² 13.44027 cm d = 2√(A ÷ π)
Worked Example 104 Tank Base 143.25 cm² 13.50524 cm d = 2√(A ÷ π)
Worked Example 105 Duct Section 144.625 cm² 13.5699 cm d = 2√(A ÷ π)
Worked Example 106 Machined Bore 146 cm² 13.63426 cm d = 2√(A ÷ π)
Worked Example 107 Cable Section 147.375 cm² 13.69831 cm d = 2√(A ÷ π)
Worked Example 108 Round Table 148.75 cm² 13.76206 cm d = 2√(A ÷ π)
Worked Example 109 Pizza Surface 150.125 cm² 13.82552 cm d = 2√(A ÷ π)
Worked Example 110 Inspection Sample 151.5 cm² 13.88869 cm d = 2√(A ÷ π)
Worked Example 111 Pipe Opening 152.875 cm² 13.95158 cm d = 2√(A ÷ π)
Worked Example 112 Circular Plate 154.25 cm² 14.01418 cm d = 2√(A ÷ π)
Worked Example 113 Garden Bed 155.625 cm² 14.0765 cm d = 2√(A ÷ π)
Worked Example 114 Tank Base 157 cm² 14.13855 cm d = 2√(A ÷ π)
Worked Example 115 Duct Section 158.375 cm² 14.20033 cm d = 2√(A ÷ π)
Worked Example 116 Machined Bore 159.75 cm² 14.26184 cm d = 2√(A ÷ π)
Worked Example 117 Cable Section 161.125 cm² 14.32308 cm d = 2√(A ÷ π)
Worked Example 118 Round Table 162.5 cm² 14.38407 cm d = 2√(A ÷ π)
Worked Example 119 Pizza Surface 163.875 cm² 14.4448 cm d = 2√(A ÷ π)
Worked Example 120 Inspection Sample 165.25 cm² 14.50527 cm d = 2√(A ÷ π)

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