Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Health
Body Fat Calculator (Navy Method)
Estimates body fat percentage using the U.S. Navy circumference method, which needs only a tape measure — no calipers or scales. It combines neck, waist, height (and hip for women) into a validated equation used by the military for body-composition screening.
Fill in the required fields to see your result.
Health
Ideal Weight Calculator
Estimate your "ideal" reference body weight from your height, biological sex, and body frame size using the Devine formula — originally created in 1974 for pharmacological dose calculation and still used clinically today. Useful as a rough planning anchor, but not a personal weight goal: it ignores muscle mass, age, and individual physiology.
Fill in the required fields to see your result.
Key differences
| Body Fat Calculator (Navy Method) | Ideal Weight Calculator | |
|---|---|---|
| Category | Health | Health |
| Inputs required | 5 | 3 |
| Result | Estimated Body Fat (%) | Ideal Weight (kg) |
| What it does | Estimates body fat percentage using the U.S. Navy circumference method, which needs only a tape measure — no calipers or scales. It combines neck, waist, height (and hip for women) into a validated equation used by the military for body-composition screening. | Estimate your "ideal" reference body weight from your height, biological sex, and body frame size using the Devine formula — originally created in 1974 for pharmacological dose calculation and still used clinically today. Useful as a rough planning anchor, but not a personal weight goal: it ignores muscle mass, age, and individual physiology. |