About weight units
Weight (or mass) units measure how heavy an object is. This tool supports grams (g), kilograms (kg), milligrams (mg), pounds (lb) and ounces (oz).
Quick unit overview
- Gram (g) — base unit in this converter (1 g = 1).
- Kilogram (kg) — 1 kg = 1000 g. Common for body weight and food packaging.
- Milligram (mg) — 1 mg = 0.001 g. Used for medicine dosages and very small masses.
- Pound (lb) — 1 lb = 453.59237 g. Common in imperial measurements.
- Ounce (oz) — 1 oz = 28.349523125 g. Often used for food portions and small items.
How conversion works
Conversions use factors relative to the base unit (gram). Example:
- Convert 2 kg to g: 2 × 1000 = 2000 g.
- Convert 8 oz to g: 8 × 28.349523125 = 226.796185 g.
- Convert 5 lb to kg: 5 × 453.59237 = 2267.96185 g → ÷1000 = 2.26796185 kg.
Tips
- Use decimal dot for fractions (e.g. 0.5).
- Swap units quickly with the ⇄ button.