Healthy weight calculator
Enter your height to see a healthy weight range in stone and pounds or kilos. Add your weight too if you want to see where you sit. Nothing is saved.
Your details
For adults 18 and over. Not for use in pregnancy.
A healthy weight for 5 ft 5 in
7 st 13 lb to 10 st 10 lb
BMI 18.5 to 24.9
- Bottom of the range (BMI 18.5)7 st 13 lb
- Top of the range (BMI 24.9)10 st 10 lb
Any weight in this range gives an adult BMI in the healthy band. It is a range, not a target, and where you sit in it is up to you.
The working
How the range is worked out
The NHS healthy BMI band runs from 18.5 to 24.9. Turn that round and you get a weight range for any height: multiply your height in metres by itself, then by 18.5 for the bottom and 24.9 for the top.
18.5 × m² to 24.9 × m²
At 5 ft 5 in (1.651 m), 1.651 × 1.651 = 2.726. So the range is 2.726 × 18.5 = 50.4 kg (7 st 13 lb) to 2.726 × 24.9 = 67.9 kg (10 st 10 lb).
Fair to everyone
Why some people get a lower top
NICE guideline NG246 says people with a South Asian, Chinese, other Asian, Middle Eastern, Black African or African-Caribbean family background tend to face a higher risk of type 2 diabetes and heart disease at a lower BMI. For them the healthy band stops at 22.9, so the top of the range comes down by about 5 kg for an average height.
Tick the box if that fits you. It is about health risk, not about how anybody looks.
Where you sit
If you add your weight
Put your weight in and we show your BMI and how far you are from either end of the range. If you are above it, there is no need to aim for the bottom: NICE notes that losing even 5% of your weight can improve blood pressure and blood sugar.
Read with care
What this cannot tell you
- MuscleHeavier, muscly builds can sit above the range while carrying little fat.
- AgeOver 65, a weight towards the top of the range can be protective.
- Growing bodiesChildren and teenagers need the NHS child BMI calculator.
Questions
Common questions
What is a healthy weight for 5 ft 5 in?
For most adults, about 7 st 13 lb to 10 st 10 lb (50.4 to 67.9 kg). On the NICE lower thresholds the top of the range is about 9 st 12 lb (62.4 kg).
Is the middle of the range the best place to be?
Not necessarily. Anywhere inside the range is a healthy BMI. Your build, your age and how active you are all matter, so pick a weight you can live with comfortably.
Why is the range so wide?
Because healthy bodies come in lots of shapes. A range of around 17 kg (about 2 st 10 lb) at an average height leaves room for different frames and muscle.
Sources
Last checked 21 October 2026. Spotted something wrong? Tell us and we will fix it.
If your weight is on your mind
Talk to your GP if your weight has changed a lot without trying, or if it is worrying you. If food or your body feels hard to think about, Beat has a free helpline on 0808 801 0677 (England, weekdays 3pm to 8pm).
Related
Related calculators
- BMI calculatorWork out your Body Mass Index in stone, pounds and feet.Open
- Ideal weight calculatorFour classic ideal weight formulas, next to the NHS range.Open
- Waist to height ratio calculatorNICE says keep your waist under half your height. Check yours.Open
- Target weight date calculatorRoughly when you would reach a weight, at a steady pace.Open
- Body frame size calculatorSmall, medium or large frame, from your wrist and height.Open
- BMI for Asian backgroundsYour BMI on the NICE lower thresholds of 23 and 27.5.Open