Weight Converter Privacy: All processing runs locally
Convert between metric and imperial weight and mass units instantly.
How It Works
The Weight Converter supports the most commonly used metric and imperial mass units. All conversions go through kilograms as the base unit.
Supported units and their exact conversion factors:
- Milligram (mg) — 1 mg = 0.000001 kg
- Gram (g) — 1 g = 0.001 kg
- Kilogram (kg) — SI base unit of mass
- Metric Ton (t) — 1 t = 1,000 kg
- Ounce (oz) — 1 oz = 0.028349523125 kg
- Pound (lb) — 1 lb = 0.453592 kg (exactly 0.45359237 kg by international agreement)
- Stone (st) — 1 st = 14 lb = 6.35029318 kg
The international avoirdupois pound is defined as exactly 0.45359237 kilograms. This tool uses that precise definition to ensure accurate conversions. All processing happens entirely in your browser.