Weight (Mass) Converter
Convert a value between common units of mass and weight.
| Value | |
| From | |
| To |
Result
Your converted value will appear here.
How it works
Each value is converted to kilograms using a fixed factor, then converted to the target unit. Examples of factors used: 1 lb = 0.45359237 kg, 1 oz = 0.028349523125 kg, 1 stone = 6.35029318 kg, 1 metric ton = 1000 kg, 1 gram = 0.001 kg.
How it works
Converts mass/weight values between units using fixed conversion factors.
Common factors
- 1 kg = 1000 g ≈ 2.20462262 lb. 1 lb = 16 oz. 1 stone = 14 lb. 1 metric tonne = 1000 kg.
Worked example
70 kg ≈ 154.32 lb (≈ 11 st 0.32 lb).
For general information only. Rounding may apply.
How to use the Weight (Mass) Converter
It takes a few seconds, and every figure is calculated in your browser.
- Enter the value.
- Choose the unit you are converting from.
- Choose the unit you are converting to.
- Press Calculate — the result appears in the dark panel beside the form.
- Use Copy, CSV, Share or Print under the result if you want to keep it.
Weight (Mass) Converter — frequently asked questions
How does the Weight (Mass) Converter work?
Each value is converted to kilograms using a fixed factor, then converted to the target unit. Examples of factors used: 1 lb = 0.45359237 kg, 1 oz = 0.028349523125 kg, 1 stone = 6.35029318 kg, 1 metric ton = 1000 kg, 1 gram = 0.001 kg.
Can you walk through a worked example?
70 kg ≈ 154.32 lb (≈ 11 st 0.32 lb).
Last updated 10 November 2026 · Formula, worked example and assumptions are documented above, and every result is calculated in your browser.