Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Health
Bra Size Calculator
Estimate a US bra size from underbust and bust measurements. Returns band size and cup letter in the form '34B'.
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
| Bra Size Calculator | Ideal Weight Calculator | |
|---|---|---|
| Category | Health | Health |
| Inputs required | 2 | 3 |
| Result | US Bra Size | Ideal Weight (kg) |
| What it does | Estimate a US bra size from underbust and bust measurements. Returns band size and cup letter in the form '34B'. | 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. |