Input
Note: Formulas provide estimates and do not replace professional guidance.
Results
Sex: —
Height: —
Wrist: —
Frame: —
| Formula | Base (kg) | Adj. (kg) | Base (lb) | Adj. (lb) |
|---|---|---|---|---|
| No results yet. Enter inputs and click Calculate. | ||||
| Average | — | — | — | — |
Frame adjustment factors: Small -10%, Medium 0%, Large +10%.
Example Data Table
Sample inputs and computed adjusted values for quick reference.
| # | Sex | Height | Wrist | Detected Frame | Devine Adj (kg) | Robinson Adj (kg) | Miller Adj (kg) | Hamwi Adj (kg) |
|---|---|---|---|---|---|---|---|---|
| 1 | Male | 178 cm | 18 cm | — | — | — | — | — |
| 2 | Female | 165 cm | 15 cm | — | — | — | — | — |
Formulas Used
Heights are converted to inches (in) and centimeters (cm) as needed. Let over60 be inches above 60 inches (5 feet); values below 60 reduce proportionally.
Devine
- Male:
IBW = 50 + 2.3 × over60kg - Female:
IBW = 45.5 + 2.3 × over60kg
Robinson
- Male:
IBW = 52 + 1.9 × over60kg - Female:
IBW = 49 + 1.7 × over60kg
Miller
- Male:
IBW = 56.2 + 1.41 × over60kg - Female:
IBW = 53.1 + 1.36 × over60kg
Hamwi
- Male:
IBW = 48.0 + 2.7 × over60kg - Female:
IBW = 45.5 + 2.2 × over60kg
Frame-size adjustment: Small: −10%, Medium: 0%, Large: +10%. Automatic detection uses the height-to-wrist ratio guidelines; override is available.
How to Use
- Select sex.
- Enter height in centimeters, or feet and inches.
- Enter wrist circumference and unit for size detection.
- Keep frame override at Auto, or choose Small/Medium/Large.
- Click Calculate to view estimates from each formula.
- Use the buttons to export results to CSV or PDF.
FAQs
Different formulas were developed for different cohorts. Comparing several provides a reasonable band. Consider the average and consult a professional for personalized targets.
We use height-to-wrist ratios commonly cited in clinical references. You can override the detection if your build differs from the default suggestion.
Yes. The calculations handle heights below five feet by subtracting the per‑inch increments appropriately from the base.
Many users prefer different units. You can toggle either unit display without affecting the underlying calculations.
No. These are reference estimates. Health decisions should be made with a qualified professional who understands your full context.
BMI Target Ranges & Percentile Bands
Healthy BMI Weight Range
Shown for the entered height. Uses standard adult BMI thresholds.
- Healthy range (kg): —
- Healthy range (lb): —
- Midpoint (BMI 21.7): —
| Category | BMI | Weight (kg) | Weight (lb) |
|---|---|---|---|
| Underweight | < 18.5 | — | — |
| Healthy | 18.5–24.9 | — | — |
| Overweight | 25.0–29.9 | — | — |
| Obesity | ≥ 30.0 | — | — |
IBW Percentile Bands (Adjusted)
Percentiles across adjusted results from Devine, Robinson, Miller, and Hamwi.
| Percentile | kg | lb |
|---|---|---|
| P25 | — | — |
| Median | — | — |
| P75 | — | — |
| IQR width | — | — |
Use the interquartile range as a practical band around estimates.
Healthy BMI Range
IBW Percentile Band
Combined: BMI Midpoint vs IBW Median