Calculate Your Ideal Weight
We calculate multiple ideal-weight formulas, apply frame adjustment, then show an average target and range.
What this tool can do
This calculator provides a practical target weight range using multiple medical formulas and frame sizing.
- Multi-Formula Engine: Devine, Robinson, Miller, Hamwi, and Peterson (BMI 22).
- Average Ideal Weight: A balanced target based on multiple methods.
- Frame Adjustment: Small/Medium/Large frame adjusts results by -10% / 0% / +10%.
- Smart Units: Metric/Imperial with automatic conversion.
- Clear Dashboard: Range, category badge, distance-to-goal, and formula breakdown.
Why you need this tool
Ideal weight estimates can help you set a realistic target when planning health goals. Using multiple formulas plus frame size avoids relying on a single equation that may not fit your body type.
- Clarity: Know a reasonable target zone instead of guessing.
- Context: Compare clinical and modern formulas side-by-side.
- Personalization: Frame adjustment reflects body structure differences.
Technical terms explained
- Ideal Body Weight (IBW): A formula-based estimate used for general reference and sometimes clinical dosing.
- Frame Size: A rough indicator of skeletal structure; we adjust results by ±10%.
- Target BMI: Peterson uses a target BMI (we use 22) to avoid underestimating weight at tall heights.
- Range Buffer: A small buffer around the average (±2 kg or ±5 lb) to form a practical zone.
Other Health Tools
Technical FAQ
Each equation was developed from different datasets and assumptions (height ranges, populations, clinical use). This tool shows multiple results and provides an average for balance.
Wrist circumference is used as a proxy for skeletal frame. Small/Medium/Large frames adjust the formula results by -10% / 0% / +10% to reflect structural differences.
Peterson is based on a target BMI. A BMI of 22 is commonly used in calculators as a neutral reference point. It helps avoid underestimating ideal weight for taller heights.
The formulas don’t include age directly. However, this tool slightly adjusts the displayed range for users over 60 to reflect that a slightly higher weight can be healthier for bone density.
No. All calculations happen in Vanilla JavaScript on your device. No external APIs are used for calculation.