Flow conversion calculator
Batch conversion
Convert several flow values in one table.
| # | Input | Direction | Standard | Result |
|---|---|---|---|---|
| Add values, then convert all rows. | ||||
Formula used
m³/day = MGD × 3,785.411784
MGD = m³/day ÷ 3,785.411784
m³/day = MGD × 4,546.09
MGD = m³/day ÷ 4,546.09
How to use
- Enter the known flow value.
- Select the required conversion direction.
- Choose US or Imperial gallons.
- Select the preferred decimal precision.
- Press Calculate to view detailed results.
Worked example
Convert 2.5 US MGD into cubic metres daily. Multiply 2.5 by 3,785.411784. The result equals 9,463.52946 m³/day.
| Input | Factor | Calculation | Result |
|---|---|---|---|
| 2.5 US MGD | 3,785.411784 | 2.5 × 3,785.411784 | 9,463.52946 m³/day |
MGD to m³/day reference table
| US MGD | m³/day | Million litres/day |
|---|---|---|
| 0.1 | 378.541 | 0.378541 |
| 0.25 | 946.353 | 0.946353 |
| 0.5 | 1,892.706 | 1.892706 |
| 1 | 3,785.412 | 3.785412 |
| 2 | 7,570.824 | 7.570824 |
| 5 | 18,927.059 | 18.927059 |
| 10 | 37,854.118 | 37.854118 |
| 25 | 94,635.295 | 94.635295 |
| 50 | 189,270.589 | 189.270589 |
| 100 | 378,541.178 | 378.541178 |
Common applications
Water utilities use MGD for treatment capacity. Engineers use m³/day for metric project reporting. Both units support clear operational planning.
Frequently asked questions
What does MGD mean?
MGD means million gallons per day. It measures large daily liquid flows. Water systems commonly use this unit.
How many m³/day equal one US MGD?
One US MGD equals 3,785.411784 m³/day. The value uses US liquid gallons. This is the common industry convention.
How many m³/day equal one Imperial MGD?
One Imperial MGD equals 4,546.09 m³/day. Imperial gallons are larger than US gallons. Choose the standard carefully.
Which gallon standard should I select?
Select US gallons for most American records. Select Imperial gallons for relevant legacy data. Always confirm the source standard.
Can this calculator reverse the conversion?
Yes, select m³/day to MGD. The calculator divides by the selected factor. Results appear with calculation steps.
Can I enter decimal values?
Yes, decimal values are fully supported. Scientific notation also works in modern browsers. Negative flow values are rejected.
Why do results change with precision?
Precision controls displayed decimal places. It does not change the conversion factor. Automatic mode removes unnecessary trailing zeros.
Does MGD represent volume or flow?
MGD represents an average flow rate. It combines volume with a daily period. It does not mean total volume alone.
Can I convert several values together?
Yes, use the batch conversion section. Add or remove rows as needed. Export the completed table afterwards.
Can results be exported?
Yes, export individual or batch results. CSV and PDF controls are included. Printing is also available.
Are these conversions suitable for engineering work?
The constants are suitable for standard calculations. Project rules may require specified rounding. Verify contractual reporting requirements first.