Ideal Weight Calculator 2025 | Healthy Weight Range

Ideal Body Weight Calculator

Sex

Male Female

Height

Healthy Weight Range

— kg

BMI Healthy Range

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Midpoint Estimate

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Robinson Formula

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Miller Formula

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Devine Formula

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Hamwi Formula

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Ideal Weight Formulas Explained

Formula	Year	Base (5 ft / 152 cm)	Per Inch Over 5 ft
Robinson	1983	52 kg (M) / 49 kg (F)	+1.9 kg (M) / +1.7 kg (F)
Miller	1983	56.2 kg (M) / 53.1 kg (F)	+1.41 kg (M) / +1.36 kg (F)
Devine	1974	50 kg (M) / 45.5 kg (F)	+2.3 kg (M) / +2.3 kg (F)
Hamwi	1964	48 kg (M) / 45.5 kg (F)	+2.7 kg (M) / +2.2 kg (F)

No single formula is perfect — these were originally developed for clinical drug dosing, not fitness. The BMI-based healthy range (18.5–24.9) is the most commonly used health benchmark and is included above for reference.

Frequently Asked Questions

The most widely accepted benchmark is the BMI healthy range (18.5–24.9), which gives a weight range rather than a single number. For example, a 175 cm (5'9") male: healthy range is approximately 56.7–76.4 kg (125–168 lbs). However, BMI doesn't account for muscle mass — a muscular person may have a "high" BMI yet be very healthy. Use multiple indicators (BMI, body fat %, waist circumference) for a fuller picture.

The Robinson, Miller, Devine, and Hamwi formulas were developed in different decades for clinical purposes (primarily calculating medication dosages based on ideal body weight). They use different base weights and per-inch increments, so they give slightly different estimates. The Hamwi formula tends to give higher values; Robinson tends to give lower ones. The average across all formulas — shown as the midpoint — is a reasonable starting reference.