Healthy Weight Calculator
Rather than a single ideal figure, this calculator gives the weight range that keeps your BMI between 18.5 and 24.9 for your height. A range is more honest than a target: two people of the same height can be healthy 15 kg apart depending on frame and muscle mass.
Inputs
Result
56.7 – 76.3 kg
How the healthy weight calculator works
Lower bound = 18.5 × height², upper bound = 24.9 × height², with height in metres.
The band widens with height because it scales with height squared — a 20 kg spread at 1.60 m becomes nearly 30 kg at 1.90 m.
Where BMI is a poor fit, sanity-check against a body fat estimate or waist measurement rather than forcing yourself toward one end of the range.
Worked example: someone 1.68 m tall
- Height squared: 2.8224.
- Lower bound: 18.5 × 2.8224 = 52.2 kg.
- Upper bound: 24.9 × 2.8224 = 70.3 kg.
- Healthy range: roughly 52–70 kg, an 18 kg span.
- At 1.85 m the same calculation gives 63–85 kg.
Common mistakes to avoid
Aiming for the bottom of the range
The lower bound is the edge of underweight, not an ideal. Most people function best in the middle of the band.
Ignoring muscle mass
Strength training can push weight above the range while improving every health marker. Judge by measurements and performance too.
Measuring height incorrectly
A 2 cm error at 1.70 m shifts the whole range by about 1.5 kg. Measure barefoot, heels together, without shoes or hair volume.
Frequently asked questions
Why is healthy weight a range and not one number?
Frame size, muscle mass and body composition all vary at the same height, so a band covers healthy variation that a single figure would wrongly exclude.
Where in the range should I aim?
The middle is a reasonable default for most people; athletes may sit above it and small-framed people comfortably below the midpoint.
How fast should I move toward the range?
0.5–1% of body weight a week is the usual sustainable pace. Faster loss increases muscle loss and rebound risk.
Does the range change with age?
The BMI-based range does not, though slightly higher BMI is associated with better outcomes in older adults. Preserving muscle matters more than the number after 60.
How does this differ from ideal weight?
Ideal weight formulas such as Devine produce one figure for clinical dosing. This range reflects the healthy BMI band and is more appropriate for personal goals.
Related calculators
BMI Calculator
Body Mass Index from height and weight, with WHO category.
Ideal Weight Calculator
Devine formula ideal body weight from height.
Body Fat Calculator
Estimate body fat percentage with the US Navy method.
Calorie Calculator
Daily calorie needs based on activity level and goal.
Lean Body Mass Calculator
Estimate fat-free mass using the Boer formula.