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Ideal Weight Calculator

Compare four clinical formulas for your healthy weight

Units

Sex

Height

Enter a valid height

Ideal Weight

Devine

Robinson

Miller

Hamwi

Ideal Weight Calculator — Complete Guide

"Ideal weight" is a surprisingly old idea. The formulas used today were mostly written in the 1960s and 1980s to standardise medication doses, not to judge how anyone should look. They are still a useful sanity check on a healthy weight range.

What this calculator does

From your height and sex it applies four formulas — Devine, Robinson, Miller and Hamwi — and shows each result plus their average, along with the weight range that corresponds to a BMI of 18.5 to 25.

The formulas

Devine: 50 kg (men) / 45.5 kg (women) + 2.3 kg per inch over 5 ft
Robinson: 52 / 49 + 1.9 / 1.7 kg per inch
Miller: 56.2 / 53.1 + 1.41 / 1.36 kg per inch
Hamwi: 48 / 45.5 + 2.7 / 2.2 kg per inch

All four start from a base weight at 5 feet (152 cm) and add a fixed amount for every extra inch of height.

A worked example

A man at 180 cm is 70.87 inches tall — 10.87 inches over five feet. Devine gives 50 + 2.3 × 10.87 = 75.0 kg. Robinson gives 72.7 kg, Miller 71.5 kg and Hamwi 77.3 kg. The four average 74.1 kg, and a BMI of 18.5-25 at that height spans 59.9 kg to 81.0 kg.

Height	Devine (men)	Healthy BMI range
165 cm	59.0 kg	50.4-68.1 kg
175 cm	68.0 kg	56.7-76.6 kg
185 cm	77.1 kg	63.3-85.6 kg

Why the number is only a guide

Muscle weighs more than fat. A trained athlete can be perfectly healthy well above the formula figure.
Frame size varies. Wrist and shoulder measurements shift a healthy weight by several kilograms.
Age matters. Some weight gain in later life is associated with better outcomes, not worse.
Distribution matters more. Waist circumference and waist-to-height ratio predict health risk better than a single target weight.

Read the four formulas as a band, not a bullseye, and treat the BMI range as the more meaningful target.

理想体重计算器完整使用指南

「理想体重」是个意外古老的概念。今天常用的几个公式大多写于 1960-1980 年代，本意是统一用药剂量，而不是评判一个人该长什么样。但作为健康体重区间的参照，它们仍然有用。

这个计算器能做什么

根据身高与性别套用四种公式 —— Devine、Robinson、Miller、Hamwi，给出各自结果与平均值，并列出对应 BMI 18.5 至 25 的体重区间。

计算公式

Devine：50 公斤（男）/ 45.5 公斤（女）+ 每超过 5 英尺 1 英寸加 2.3 公斤
Robinson：52 / 49 + 每英寸 1.9 / 1.7 公斤
Miller：56.2 / 53.1 + 每英寸 1.41 / 1.36 公斤
Hamwi：48 / 45.5 + 每英寸 2.7 / 2.2 公斤

四个公式都以 5 英尺（152 厘米）的基准体重为起点，身高每多一英寸就加固定值。

算例演示

一位 180 厘米的男性，合 70.87 英寸，超出 5 英尺 10.87 英寸。Devine 给出 50 + 2.3 × 10.87 = 75.0 公斤；Robinson 72.7 公斤，Miller 71.5 公斤，Hamwi 77.3 公斤。四者平均 74.1 公斤。而同身高下 BMI 18.5-25 对应 59.9 至 81.0 公斤。

身高	Devine（男）	健康 BMI 区间
165 厘米	59.0 公斤	50.4-68.1 公斤
175 厘米	68.0 公斤	56.7-76.6 公斤
185 厘米	77.1 公斤	63.3-85.6 公斤

为什么这个数字只是参考

肌肉比脂肪重。 训练有素的运动员完全可能远高于公式值却非常健康。
骨架大小有差异。 手腕与肩宽数据可以让健康体重上下浮动好几公斤。
年龄有影响。 晚年略微增重与更好的健康结局相关，而不是更差。
脂肪分布更重要。 腰围与腰高比对健康风险的预测能力，优于单一目标体重。

把这四个公式当成一个区间而不是靶心，并把 BMI 区间作为更有意义的参考目标。

Frequently Asked Questions

Which ideal weight formula is most accurate?

None is definitively best. Devine is the most widely used in clinical practice, Robinson and Miller were refinements, and Hamwi is the oldest. The four usually agree within a few kilograms, and the average is a reasonable single figure.

Is ideal weight the same as healthy weight?

Not exactly. Ideal weight formulas give one target number based on height; a healthy weight is a range, usually defined by a BMI between 18.5 and 25. The range is the more useful guide.

Do these formulas work for athletes?

Poorly. Muscle is denser than fat, so muscular people often sit above the ideal weight while being very healthy. For athletes, body-fat percentage and performance measures are better guides than a height-based formula.

Last reviewed: October 5, 2026 · How we calculate · Sources: Devine (1974), Robinson (1983), Miller (1983), Hamwi (1964), WHO