Weight Converter
Convert between any weight unit with our all-in-one weight converter. Enter a value in any unit and all others update instantly — kilograms, stone, pounds, ounces and grams.
Britain uniquely uses three weight systems simultaneously — metric (kg, grams) for official purposes, imperial (pounds, ounces) for food and US compatibility, and the exclusively British stone system for body weight.
Weight Conversion Reference — All Units
Frequently Asked Questions
Weight Converter — common questions answered
What is the easiest way to convert between kg, stone and pounds?
Use our all-in-one weight converter above. Enter any value and all units update instantly. Key conversions: 1 stone = 6.35kg = 14lbs; 1kg = 2.205lbs; 1lb = 16oz = 453.6g.
How do I convert stone to kg and lbs at the same time?
Multiply stone by 6.35029 for kg, or multiply stone by 14 for pounds. Our weight converter above shows all conversions simultaneously.
What weight units does the UK use?
The UK officially uses kilograms (metric) but stone and pounds remain in widespread everyday use for body weight, and ounces are still used in food and precious metals. The UK is unique in regularly using all three systems.
What is the difference between imperial and metric weight?
Metric uses kilograms and grams (based on powers of 10). Imperial uses pounds, ounces and stone (historical units). The UK officially adopted metric in 1965 but imperial units remain legal for certain uses.