Kilograms to Pounds Converter

Formula

pounds = kilograms × 2.2046226218487757

Reverse:

kilograms = pounds × 0.45359237

Formula variables

• kilograms — mass in kilograms (kg).
• pounds — equivalent mass in international avoirdupois pounds (lb).
• 2.2046226218487757 — the exact number of pounds per kilogram (1 / 0.45359237).

Worked Examples

Example 1: 1 kilogram to pounds

1. Start: 1 kg.
2. Multiply: 1 × 2.2046226218487757.
3. Result: 1 kilogram ≈ 2.20462 pounds.

Example 2: 70 kilograms to pounds

1. Start: 70 kg.
2. Multiply: 70 × 2.2046226218487757 = 154.3235835294143.
3. Result: 70 kg ≈ 154.324 pounds.

Example 3: 100 kilograms to pounds

1. Start: 100 kg.
2. Multiply: 100 × 2.2046226218487757 = 220.46226218487757.
3. Result: 100 kg ≈ 220.462 pounds.

Common Conversion Table

Real-World Uses

• Fitness and nutrition: Body weight is measured in kilograms in most countries but in pounds in the US. Weightlifting plates are also labeled differently.
• Shipping and freight: Air and sea freight often require both metric and imperial weights on documentation.
• Cooking and baking: Ingredient quantities in recipes are sometimes given in kilograms but measured in pounds (or ounces) on US kitchen scales.
• Science and medicine: Drug dosages are almost universally specified in metric units, but patient weight is sometimes recorded in pounds in the US.

Unit Definitions

Kilogram (kg)

The SI base unit of mass. Since 2019, defined by fixing the Planck constant to exactly 6.62607015 × 10⁻³⁴ J·s.

Pound (lb)

The international avoirdupois pound is defined as exactly 0.45359237 kilograms by the 1959 international yard and pound agreement. There are also troy and apothecary pounds, but they are no longer used commercially.

Mass vs. Weight

Strictly speaking, kilogram is a unit of mass and pound is also a unit of mass. But in everyday usage, the word "weight" usually refers to mass. On the surface of the Earth, a 70 kg person also "weighs" about 154 pounds because gravity here is roughly constant. On the Moon, the same person would still have a mass of 70 kg, but a "weight" about 1/6 as large in newtons. The converter above converts between mass units only — it does not account for local gravity.

Accuracy and Rounding

Because the pound is defined as exactly 0.45359237 kilograms, the kilograms-to-pounds factor is an exact decimal of many digits. Displayed results are capped at the significant-figure precision appropriate to the input magnitude.

Related Converters

• Pounds to Kilograms — reverse conversion
• Grams to Ounces
• Stones to Kilograms
• All Mass Converters

Frequently Asked Questions