Select a category
Conversion Formula:
Convert Pound to Kilogram (lb to kg) instantly with accurate, readable results.
Use our Mass Unit Converter to convert between grams, kilograms, pounds, ounces, and other weight units instantly. Designed for cooking, science, fitness, and engineering needs, this unit conversion tool offers accurate results between metric and imperial systems. Whether you’re tracking body weight, measuring ingredients, or handling heavy machinery, our mass unit conversion calculator has you covered.
Pound (lb) — an imperial and US customary unit of mass
It is defined as exactly 0.45359237 kilograms; this is the international avoirdupois pound used for ordinary mass and weight measurements. Used mainly in the United States and some other countries for measuring body weight, food, packages, shipping, sports equipment, and everyday masses.
- Symbol: lb
- System: Imperial and US customary unit for mass
- Exact relations: 1 lb = 16 oz = 0.45359237 kg = 453.59237 g
- Metric equivalents: 1 lb ≈ 0.453592 kg ≈ 453.592 g
- Typical examples: a loaf of bread ~1 lb; a laptop ~3 lb; an adult person ~150 lb.
Kilogram (kg) — the SI base unit of mass
It is defined by fixing the Planck constant at exactly 6.62607015×10⁻³⁴ J·s; together with the definitions of the meter and second, this sets the kilogram. Used worldwide for measuring mass in science, engineering, commerce, medicine, food, shipping, and everyday life.
- Symbol: kg
- System: SI base unit for mass
- Exact relations: 1 kg = 1000 g = 1,000,000 mg
- Imperial equivalents (derived from 1 lb = 0.45359237 kg exactly): 1 kg ≈ 2.20462 lb ≈ 35.27396 oz
- Typical examples: 1 liter of water ~1 kg; a laptop ~1.5 kg; an adult person ~70 kg.