OTHER · WEIGHT CONVERTER
Weight Converter Calculator
Convert between milligrams, grams, kilograms, metric tonnes, ounces, pounds, stone, and US/UK tons. Uses exact NIST-defined conversion factors.
0.4536
kg
1 lb = 0.4536 kg
About This Calculator
Convert weight and mass between metric and imperial units. All factors are exact per the 1959 international pound definition (1 lb = 0.45359237 kg exactly).
How It Works
Select a source unit and a target unit, then enter your weight. The converter multiplies by the source unit's exact kilogram factor and divides by the target's.
The Formula
result = value × factor(from) ÷ factor(to), where each factor is the unit's exact mass in kilograms (e.g. 1 lb = 0.45359237 kg; 1 stone = 6.35029318 kg).
Frequently Asked Questions
- How many grams in a pound?
- Exactly 453.59237 grams — the 1959 international pound definition.
- What is the difference between a short ton and a metric tonne?
- A US short ton is 2000 lb ≈ 907.18 kg. A metric tonne is exactly 1000 kg ≈ 2204.62 lb.