Calculation history
Stored only in this browser| Date | Mode | Primary result | Details |
|---|---|---|---|
| No saved calculations yet. | |||
Formula used
Educational estimate
The simple method multiplies body weight by a selected ratio. The adjusted method applies transparent age, height, and activity factors. These estimates remain educational and cannot measure bone density accurately.
Estimated bone mass = body weight in kilograms × selected ratio
The custom method uses the percentage entered by the user. Output includes kilograms, pounds, percentage, and estimated remaining mass. Never use these values to diagnose a medical condition.
DXA comparison
The analyzer preserves BMC, BMD, T-score, and Z-score entries. It calculates absolute change and percentage change between scans. Official reports should guide every clinical interpretation and decision.
Percentage change = ((current − previous) ÷ previous) × 100
How to use this calculator
- Select Estimated Bone Mass or DXA Report Analyzer.
- Enter values and choose the correct measurement units.
- Review the live preview before submitting the form.
- Select Calculate and save result for full output.
- Copy, print, share, or export the generated summary.
- Compare saved DXA values using the history chart.
Check every unit before submitting the calculator form. Use sample data to understand each available input field. Replace examples with your own verified values before calculating.
Example data
| Mode | Example inputs | Expected output type |
|---|---|---|
| Estimate | Female, 35 years, 70 kg, 170 cm, moderate activity | Educational mass estimate in kilograms and pounds |
| DXA | BMC 2,450 g, BMD 1.05 g/cm², previous BMD 1.02 | Report summary and percentage change |
Example values demonstrate calculator behavior without providing medical guidance. Results depend entirely on selected methods and entered measurements. Verify every report value before making any comparison yourself.
Bone mass, BMC, and BMD
Bone mass commonly describes an estimated amount within body composition. BMC records mineral content from a clinical imaging report. BMD describes mineral density for a specific measured region.
| Term | Meaning here | Typical unit |
|---|---|---|
| Estimated bone mass | Educational body-composition estimate | kg or lb |
| BMC | Bone mineral content copied from DXA | g or kg |
| BMD | Bone mineral density copied from DXA | g/cm² |
| T-score | Standardized score from the official report | score |
| Z-score | Age-related standardized score from the report | score |
Factors and limitations
Scale algorithms may use weight, impedance, sex, and age. Hydration and device assumptions can change displayed body composition. DXA reports also require region-specific and clinical interpretation.
- The estimation method is not a medical formula.
- Estimated bone mass is not fracture-risk assessment.
- Different devices may provide different estimated values.
- Repeated DXA comparisons should use consistent report regions.
- Small changes may reflect measurement variation.
- Children require age-appropriate professional interpretation.
- Pregnancy-related imaging questions require clinical guidance.
- Treatment and supplement decisions require professional advice.
Frequently asked questions
1. Is estimated bone mass the same as BMD?
No, these values represent different concepts and measurement methods. Estimated mass is usually generated by a body-composition algorithm. BMD comes from a clinical scan for specific regions.
2. Can this calculator diagnose osteoporosis?
No, this calculator cannot diagnose any medical condition. It summarizes entered data and provides an educational estimate. Use official reports and qualified professional interpretation for diagnosis.
3. What does BMC mean?
BMC means bone mineral content within a measured scan region. The report commonly presents this value in grams. Enter the exact figure shown on your report.
4. What does BMD mean?
BMD means bone mineral density for the scanned region. Reports commonly present this value using grams per square centimeter. Keep region names consistent when comparing repeated scan results.
5. Why does the estimate include activity?
Activity is included only within the optional educational heuristic. It changes the result using a small transparent factor. It does not reproduce a validated clinical measurement method.
6. Can children use this calculator?
The estimate can demonstrate units for educational purposes only. Pediatric DXA interpretation requires age-specific standards and trained professionals. Never apply adult interpretations directly to a child.
7. Why might two smart scales disagree?
Devices may use different sensors, equations, and stored assumptions. Hydration and contact conditions may also affect impedance readings. Compare trends using one device under similar conditions.
8. Are my entered values stored online?
The PHP page processes submitted values for the result. Browser history uses local storage on your current device. This file does not create a server database record.
9. How should repeated DXA scans be compared?
Use matching regions and values from official scan reports. Consider scan dates, equipment, and clinical measurement uncertainty. Ask the reporting clinician whether observed changes are meaningful.
Privacy and medical disclaimer
This standalone file creates no database storage by default. Calculation history remains within your browser local storage. Clear browser history using the provided button whenever needed.
This calculator provides educational information and report organization only. It cannot diagnose, treat, or prevent any medical condition. Seek qualified care for symptoms, treatment, and scan interpretation.