Ideal Weight — Quick 8-Section Guide
1) Core idea
Ideal Body Weight (IBW) estimates a healthy weight for height and sex using clinical formulas (Robinson, Miller, Devine, Hamwi). It’s a guide, not a mandate—body composition matters.
2) Flow you can trust
- Enter height (cm, inches, or ft+in) and select sex.
- We convert height exactly (1 in = 2.54 cm).
- We compute four IBW formulas and show their average.
- Optionally compare with your current weight (kg or lb).
3) Sanity checks
- 5 ft baseline: formulas add per-inch increments above 60 inches.
- Under 5 ft: we use a conservative base estimate.
- Units: 1 lb = 0.45359237 kg (exact).
4) Shortcuts
- Rule of thumb: average of Robinson + Miller + Devine + Hamwi is a balanced target.
- Small/large frame? Consider ±10% adjustment around IBW.
5) Pitfalls
- IBW ignores muscle mass—athletes may sit above IBW and still be healthy.
- Use the same units throughout to avoid rounding noise.
6) Micro examples
- Male, 5′10″ (178 cm): each formula gives a slightly different kg; average is your quick target.
- Female, 5′4″ (163 cm): compare formulas, then set a range rather than a single number.
7) Mini‑FAQ
- Which formula is “best”? Robinson/Miller are commonly preferred; we show all for context.
- How precise is it? Use within ±5–10% as a practical range.
- Can I use pounds? Yes—exact conversion: 1 kg = 2.20462262185 lb.
8) Action tip
Pick the average IBW, set a 5–10% window around it, and pair with body‑fat or LBM checks for a fuller picture.