# Ideal Body Weight Calculator

Calculate your ideal body weight using four proven formulas: Devine, Robinson, Miller, and Hamwi. Compare results and find your healthy weight range.

## What this calculates

There is no single perfect weight for any height. This calculator estimates your ideal body weight using four of the most commonly used clinical formulas so you can see the range of recommendations.

## Inputs

- **Gender**
- **Height** (in) — min 50, max 100 — Enter your height

## Outputs

- **Ideal Weight (Devine)** (kg) — Ideal body weight using the Devine formula (1974)
- **Ideal Weight (Robinson)** (kg) — Ideal body weight using the Robinson formula (1983)
- **Ideal Weight (Miller)** (kg) — Ideal body weight using the Miller formula (1983)
- **Ideal Weight (Hamwi)** (kg) — Ideal body weight using the Hamwi formula (1964)
- **Healthy BMI Weight Range** — formatted as text — Weight range for BMI 18.5–24.9 at your height

## Details

The Devine formula (1974) is the most widely used ideal body weight equation and was originally developed for drug dosage calculations. It estimates: Men = 50 + 2.3 kg per inch over 5 feet; Women = 45.5 + 2.3 kg per inch over 5 feet. This calculator also includes the Robinson (1983), Miller (1983), and Hamwi (1964) formulas for comparison. All of these formulas were developed from population studies and may not account for individual differences in body composition, frame size, or ethnicity. The healthy BMI weight range (18.5–24.9) is also provided as an additional reference point.

## Frequently Asked Questions

**Q: Which ideal weight formula is most accurate?**

A: No single formula is definitively the most accurate for all people. The Devine formula is the most widely referenced in clinical settings, but it was originally designed for drug dosing, not health assessment. Comparing results from multiple formulas gives a better picture of your healthy weight range.

**Q: Is ideal body weight the same as healthy weight?**

A: Not necessarily. Ideal body weight formulas provide rough estimates based on height and gender. A truly healthy weight depends on many factors including body composition, muscle mass, bone density, age, and overall fitness level. The BMI-based healthy weight range can be a useful complementary reference.

**Q: Why do the formulas give different results?**

A: Each formula was developed from different study populations at different times using different methodologies. The variation between them illustrates that there is a range of reasonable weights for any given height, not a single precise number.

**Q: Should I use this to set a weight loss goal?**

A: These formulas can provide a general reference, but weight loss goals should be set in consultation with a healthcare professional who can account for your full health history, body composition, and individual needs. Aiming for a weight within the healthy BMI range is generally a reasonable approach.

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Source: https://vastcalc.com/calculators/health/ideal-weight
Category: Health & Fitness
Last updated: 2026-04-21