Ideal Body Weight Calculator (Devine Formula)
Calculate your ideal body weight using the Devine formula — the most commonly used IBW calculation in clinical medicine for drug dosing, nutrition planning, and tidal volume estimation.
Ideal Body Weight Calculator (Miller Formula)
Calculate your ideal body weight using the Miller formula (1983). Gives the highest IBW estimates among the four major formulas — a more generous reference weight for your height.
Optional
lbs
Miller Ideal Body Weight
155 lbs
Range: 140–170 lbs
Miller IBW⧉
155 lbs
1983 formula
4-Formula Average⧉
159 lbs
Devine + Robinson + Miller + Hamwi
vs. Actual⧉
+25 lbs
Above IBW
Formula Comparison
Devine1974
161 lbs
Robinson1983
157 lbs
Miller1983
155 lbs
Hamwi1964
165 lbs
■ Red line = actual weight
IBW is a clinical reference, not a personal target. Consult a healthcare professional for personalized weight guidance.
Planning notes, formulas, and examples
About the Ideal Body Weight Calculator (Miller Formula)
The Miller formula is a historical ideal body weight equation that is still reproduced in clinical references. It uses a higher base weight and a relatively small per-inch increase, which can make it a useful upper comparison point among common IBW formulas.
Because it was developed empirically, it should be treated as a reference equation rather than a precise or universal standard.
When This Page Helps
Miller is one of several historical IBW equations. It can be useful when you want to compare a higher-end IBW estimate against other formulas, but it should not be treated as inherently more accurate.
How to Use the Inputs
- Select your sex.
- Enter your height.
- Optionally enter actual weight for comparison.
- View your Miller IBW and the ±10% range.
- Compare with the other three IBW formulas.
Formula used
Men: IBW = 56.2 + 1.41 × (height in inches − 60)
Women: IBW = 53.1 + 1.36 × (height in inches − 60)
Result in kg. Healthy range: IBW ± 10%Example Calculation
Result: IBW: 70.3 kg (155 lbs) | Range: 63.3–77.3 kg
Male at 5'10" (70 inches): IBW = 56.2 + 1.41 × (70 − 60) = 56.2 + 14.1 = 70.3 kg (155 lbs). Miller gives a lower IBW than Devine (73.0 kg) at this height because the per-inch increment is only 1.41 kg vs. Devine's 2.3 kg.
Tips & Best Practices
- Miller uses a higher base and smaller per-inch increments than some other IBW formulas, so the ranking can change with height.
- The "crossover" with Devine depends on sex and height, so it is better to compare the full range than to rely on a single cutoff.
- Averaging several IBW formulas can help show the spread between historical reference equations.
- IBW is a reference, not a prescription. A 10–15% range around any IBW is a convention, not a clinical rule.
Understanding the Miller Formula
Miller is one of several historical ideal-body-weight equations. Its smaller per-inch increment means it can sit at the higher end of the comparison range at shorter heights and shift lower relative to some other formulas at taller heights.
Comparing Multiple IBW Equations
For practical use, the value of Miller is in comparison. Looking at Miller alongside Devine, Robinson, and Hamwi shows the spread between reference equations and makes it easier to avoid treating any one formula as exact.
Sources & Methodology
Last updated:
Methodology
This calculator applies the Miller ideal-body-weight equation and shows it as a historical reference estimate. The comparison range is intentionally descriptive: different equations were built from different assumptions, so disagreement between formulas is expected.
The page does not claim that Miller is more accurate than the others. It simply exposes the equation, shows the result, and lets the user compare it with neighboring reference formulas.
Sources
- Ideal body weight: A commentary (PubMed) — Reviews the history and current use of common ideal-body-weight equations.
- Comparison of ideal body weight equations and published height-weight tables with body mass index tables for healthy adults in the United States (PubMed) — Compares common IBW equations against published height-weight tables.
Frequently Asked Questions
Miller is commonly reproduced as a historical ideal-body-weight equation with a higher base and smaller height increment than some older formulas. That makes it useful for comparison, but not for identifying one correct weight.
Miller and Robinson often produce higher values than Devine at shorter heights. Which one is most useful depends on the purpose, but none should be treated as a universal standard.
The formulas can differ by several kilograms at the same height because they were derived from different historical assumptions and datasets. That spread is normal and is why they are best read as a range, not a verdict.
Neither. Miller is best understood as one historical estimate among several.
No single formula is correct for all people. Comparing several formulas can help show the range of historical estimates for the same height.
No. Like all four major IBW formulas, Miller assumes a medium body frame.
More in this topic
Ideal Body Weight Calculator (Robinson Formula)
Calculate your ideal body weight using the Robinson formula (1983). A refined clinical IBW equation that gives slightly higher estimates than Devine for most heights.
Ideal Body Weight Calculator (Hamwi Formula)
Calculate your ideal body weight using the Hamwi formula (1964). The oldest major IBW equation, widely used in clinical dietetics with the highest per-inch weight increment.