How this calculator works
This tool converts mass, not gravitational force. A pound is exactly 0.45359237 kg; a stone contains 14 pounds. The metric ton is 1,000 kg and is distinct from US and Imperial tons.
The formula
Base amount = value × source factor
Target amount = base amount / target factorA quick example
100 kg is approximately 220.462262 lb.
How to use this calculator
- Enter a value using a decimal point.
- Choose the source and target units.
- Read the live result or swap units to reverse the direction.
A few common questions
Which convention does this converter use?
This tool converts mass, not gravitational force. A pound is exactly 0.45359237 kg; a stone contains 14 pounds. The metric ton is 1,000 kg and is distinct from US and Imperial tons.
Can I reverse the conversion?
Yes. Swap exchanges the units, keeps your input amount and calculates again.
Why is the displayed result rounded?
The calculation uses the full stored factor. Results show up to six decimal places, with scientific notation for very small or large amounts.
Reference: NIST conversion factors