Ideal Body Weight Calculator
Estimate ideal body weight from height and gender (Devine formula) — free, instant.
How to Use the Ideal Body Weight Calculator
- Select Gender & Height: Input your gender and standing height.
- Choose Baseline: The tool applies the Devine formula automatically.
- View Target Range: Instantly view your estimated target body weight.
Why Use This Calculator
Estimating your ideal body weight based on height and gender online for free gives a quick reference point using an established medical formula. This calculator applies the Devine formula, one of the most widely referenced methods, to estimate a target weight range in seconds.
How It Works
This IBW formula calculator uses the Devine formula — a standard baseline of 50kg for men and 45.5kg for women at 5 feet, adding 2.3kg for each additional inch of height — to estimate a target weight range, calculated instantly client-side. It's a free, instant local alternative to Omni Calculator's IBW tool for a quick reference estimate.
Key Features
The target-weight-calculator adjusts its baseline calculation based on the gender selected, since the Devine formula uses different starting constants for men and women. As a height-to-weight-ratio guide, results appear instantly with no page reload, letting you quickly compare how the estimate changes across different height inputs. The tool recalculates immediately after adjusting height or gender, making it easy to compare estimates across a range of values. Height can now be entered in centimeters or feet and inches, the result clearly labels the Devine formula method used and restates your inputs, results show in both kg and lb, and a Copy Result button captures the full summary.
Common Use Cases
Fitness enthusiasts use the estimate as one reference point when setting a general weight goal alongside other health metrics. Healthcare students learn how standard medical weight formulas like Devine's are applied in practice. Personal trainers reference the calculation as a conversation starter with clients about general weight ranges, and anyone curious about standard weight benchmarks checks their own estimate. Nursing and medical students practice applying the Devine formula as part of coursework on standard clinical estimation methods.
Tips for Best Results
Remember this is a general population formula and doesn't account for individual factors like frame size, muscle mass, or body composition — treat the result as a general reference range rather than a precise personal target. Different formulas (Devine, Robinson, Miller, Hamwi) can produce slightly different estimates, so small variations between calculators are normal and expected.
A Quick Note
General estimates like this work best as one input among several when thinking about health and fitness goals, alongside guidance from a doctor or nutritionist for anything more personalized.
Privacy & Security
Because ToolNest processes everything entirely within your browser using client-side JavaScript, your files never leave your device. There is no server-side storage, no third-party analytics attached to your data, and no risk of a breach exposing files you processed months ago.
What general factors influence ideal body weight calculations?
Height and gender are the primary inputs in most standard formulas, though frame size and body composition also affect what's healthy for an individual.
How do standard health formulas estimate target weight ranges?
Formulas like Devine's use a baseline weight for a reference height, then add a fixed amount per inch of additional height.
Why do different ideal weight formulas give different results?
Formulas like Devine, Robinson, Miller, and Hamwi use slightly different baseline constants, producing modestly different estimates for the same height.
Should I treat this calculation as a strict personal target?
No, treat it as a general reference range rather than a precise individual target, since it doesn't account for frame size or muscle mass.