Everyday & industry
Weight Converter
Convert weights and mass between common metric and imperial units, with a single conversion or a grouped multi-unit table.
Enter a weight, choose the source unit, and convert it instantly to another common metric or imperial unit.
Conversions use fixed mathematical relationships and do not require external data.
Results update as you edit. Calculations run locally in your browser; your inputs are not saved.
Choose your units.
Calculated locally · Weight Converter
Your Weight Conversion
The converted value represents the same mass expressed in a different unit.
Result Detail
Conversion Breakdown
Source value × source-to-kilograms factor ÷ target-to-kilograms factor. Displayed decimals may be rounded; internal values are not.
About this calculator
Quick conversion references
These are static reference relationships, not results calculated from your inputs.
- 1 kg ≈ 2.20462 lb.
- 1 lb = 0.45359237 kg.
- 1 oz = 28.349523125 g.
- 1 kg ≈ 35.27396 oz.
- 1 stone = 14 lb.
- 1 metric tonne = 1000 kg.
Exact factors, readable results
Every conversion passes through the full-precision kilogram value. Rounded display values are not used in calculations.
- Auto uses up to two decimal places for values of 1,000 or more, four for values of at least 1, and six for values below 1. Unnecessary trailing zeros are removed.
- Use Decimal Places for a different display precision. Scientific notation is used only when very small or large numbers become impractical to display normally.
- Pounds and ounces use the international avoirdupois definitions reflected in the conversion constants.
Frequently asked questions
How do I convert kilograms to pounds?
Divide kilograms by 0.45359237. One kilogram is approximately 2.2046226218 pounds; displayed decimals depend on the selected precision.
How do I convert pounds to kilograms?
Multiply pounds by 0.45359237.
How many ounces are in a pound?
One international avoirdupois pound is exactly 16 ounces.
How many grams are in an ounce?
One international avoirdupois ounce is exactly 28.349523125 grams.
How many pounds are in a stone?
One stone is exactly 14 pounds.
What is the difference between a metric tonne and a US short ton?
A metric tonne is exactly 1,000 kilograms. A US short ton is exactly 2,000 pounds, or 907.18474 kilograms.
A mathematical weight and mass conversion tool only. It does not calculate BMI or give nutrition or medical advice.