Weight Converter
Convert mass among milligrams, grams, kilograms, metric tonnes, ounces, pounds, stone, and US short tons. A complete table makes it easy to compare the entered mass in every supported unit.
Weight Converter tool
About the Weight Converter
This calculator helps with shipping, recipes, product specifications, and everyday measurements. It uses avoirdupois ounces and pounds, not the troy units used for some precious metals.
How Is Weight Calculated?
Use the dimensions and definitions below. Calculations use unrounded intermediate values; displayed results are rounded.
Destination mass = value × source kilograms per unit ÷ destination kilograms per unit
Example
10 pounds × 0.45359237 = 4.5359237 kilograms.
How to Use the Weight Converter
- Enter the mass.
- Select the original mass unit.
- Select the desired unit.
- Compare the result with the all-units table.
- Swap units or reset as needed.
Weight Converter Examples
Pounds to kilograms
10 pounds × 0.45359237 = 4.5359237 kilograms.
Stone to pounds
2 stone × 14 = 28 pounds.
Measurement and input conventions
One avoirdupois pound is exactly 0.45359237 kilogram.
A US short ton equals 2,000 pounds, or 907.18474 kilograms.
Using the result responsibly
No. It converts mass units commonly called weight units. Weight as force also depends on gravitational acceleration.
Keep adequate precision when transferring results to another calculation. Rounding a displayed result too early can change a later answer.
Frequently Asked Questions
How many kilograms are in a pound?
One avoirdupois pound is exactly 0.45359237 kilogram.
What is a US short ton?
A US short ton equals 2,000 pounds, or 907.18474 kilograms.
Is a tonne the same as a short ton?
No. A metric tonne is 1,000 kilograms.
Are ounces fluid ounces?
No. These ounces measure mass; fluid ounces measure volume.
Does this calculate force?
No. It converts mass units commonly called weight units. Weight as force also depends on gravitational acceleration.