Ideal weight calculator

See an estimated healthy weight range for your height, based on four well-known medical formulas developed for exactly this purpose.

Gender

Height (ft)

Height (in)

Average across all four formulas

Hamwi formula (1964)—

Devine formula (1974)—

Robinson formula (1983)—

Miller formula (1983)—

Why there are multiple formulas

"Ideal weight" was originally a medical concept created to help doctors estimate drug dosages and nutritional needs, not a beauty standard. Because different researchers built their formulas from different patient populations and decades of data, no single formula is universally "correct" — which is why this calculator shows four of the most widely referenced ones side by side, along with their average, rather than presenting a single number as gospel.

The four formulas used here

Hamwi (1964): one of the earliest and still most commonly cited formulas, originally created to help estimate medication dosing
Devine (1974): a refinement of Hamwi's approach, and the formula most frequently used in clinical and pharmacy settings today
Robinson (1983): adjusted the base weight and per-inch increment based on newer population data
Miller (1983): tends to produce a higher estimate than the others, using a larger base weight and smaller per-inch increment

All four follow the same basic shape: a base weight for someone exactly 5 feet tall, plus a fixed amount added for every inch of height above that.

Important limitations

None of these formulas account for muscle mass, bone structure, body fat distribution, or overall frame size — a muscular athlete and a sedentary person of the same height will get the exact same "ideal weight" from every formula here, even though a healthy weight for each of them may look quite different in practice. These numbers are best treated as a general reference point, not a target to chase.

Formula	Best used for
Devine	Clinical dosage calculations
Hamwi	Quick general reference
Robinson / Miller	Cross-checking against other estimates

For a fuller picture of healthy weight, it's worth looking at this result alongside your BMI and body fat percentage, and discussing any specific goals with a doctor or dietitian.