Ideal Weight Calculator
BMI 22 sits near the lowest-mortality range, which is why it is used as a reference weight. The second figure is the Devine formula hospitals use for drug dosing.
Your numbers
Ideal weight
63.6kg
Result
65.8kg
Formula
Ideal weight = 22 × (Height (cm) ÷ 100)²
Ideal weight is a reference line, not a goal — a healthy weight varies with frame and muscle mass.
What to enter
| Input | Default | Accepted range |
|---|---|---|
| Height (cm)Height in centimetres; converted to metres inside the formula. | 170 | 100 ~ 250 |
| Sex (M1 / F0)Where the formula splits by sex — enter 1 for male, 0 for female. | 1 | 0 ~ 1 |
Step by step
Quick reference table
Results when only Height (cm) changes and everything else stays put.
| Height (cm) | Ideal weight (kg) | Result (kg) |
|---|---|---|
| 100 | 22 | 2.8 |
| 128 | 36 | 28 |
| 170 | 63.6 | 65.8 |
| 250 | 137.5 | 137.8 |
What each result means
| Result | At default values |
|---|---|
| Ideal weight (kg)A reference weight from height alone — a benchmark, not a goal. | 63.6 |
| Result (kg)What the formula gives back — the answer this page is for. | 65.8 |
Common mistakes
Ideal weight is a reference line, not a goal — a healthy weight varies with frame and muscle mass.
Glossary
- Height (cm)
- Height in centimetres; converted to metres inside the formula.
- Sex (M1 / F0)
- Where the formula splits by sex — enter 1 for male, 0 for female.
- Ideal weight
- A reference weight from height alone — a benchmark, not a goal.
- Result
- What the formula gives back — the answer this page is for.
Frequently asked questions
Q. How is Ideal Weight Calculator calculated?
Ideal weight = 22 × (Height (cm) ÷ 100)² — BMI 22 sits near the lowest-mortality range, which is why it is used as a reference weight. The second figure is the Devine formula hospitals use for drug dosing.
Q. Can you walk through an example?
With Height (cm) 170, Sex (M1 / F0) 1, the answer is Ideal weight 63.6kg.
Q. What do I need to enter?
Enter Height (cm), Sex (M1 / F0). The result recalculates as you type, and an empty box counts as zero.
Q. How much does the answer move if I change a number?
Changing only Height (cm) moves the answer to Height (cm) 100 → Ideal weight (kg) 22 and Height (cm) 250 → Ideal weight (kg) 137.5. The table below lays out five steps.
Q. How are the numbers rounded?
Money is shown to the nearest whole unit, percentages to one decimal place and everything else to two. What you see is rounded; the calculation itself carries the unrounded value forward.
Q. Anything to watch out for?
Ideal weight is a reference line, not a goal — a healthy weight varies with frame and muscle mass.
Related calculators
These calculators help you understand health figures; they do not replace diagnosis or prescription. See a clinician if you have symptoms.