Free · private · no sign-up
Kg, pounds and stone weight converter
Type a weight once and see it in kilograms, pounds, and stone plus pounds. It handles the part that catches people out: the pounds left after the whole stones.
12st 12.8lb · 180.8lb
Last edited in kg.
The useful bit
What the answer means
Stone and pounds is a mixed unit: 180.8lb is not 12.91 stone written as 12st 91lb. The calculator takes the whole stones first, then shows the remaining pounds.
Results are rounded for reading, but each conversion is calculated from the full precision constant rather than converting a rounded answer again.
Transparent by design
How it works
- 1
Choose what you have
Start in kilograms, pounds, or stone and pounds.
- 2
Type one weight
All three versions update together as you type.
- 3
Copy the useful one
Use the share button to copy a tidy conversion and its link.
1 kilogram = 2.2046226218 pounds; 1 stone = 14 poundsPlain answers
Questions people ask
How many pounds are in a stone?
There are exactly 14 pounds in one stone.
How many pounds are in a kilogram?
One kilogram is approximately 2.20462 pounds.
Why is the stone answer split in two?
People normally write imperial body weight as whole stones plus the pounds left over, for example 12st 13lb, rather than a decimal number of stones.
Does converting change my weight loss percentage?
No. A percentage is the same whichever consistent unit you use.
Method and sources
The conversion uses exact international unit definitions and straightforward arithmetic.
Checked 19 October 2026. General information, not medical advice. Follow your prescriber and dispensing label.