Weight and Mass / lb → kg
Convert Pounds to Kilograms
Translate weights on shipping labels or equipment into kilograms. Enter pounds as a decimal; 8 pounds 8 ounces is 8.5 pounds.
Reverse: Kilograms to Pounds →
How to convert pounds to kilograms
These units measure mass. Converting recipe weights to cups requires an ingredient-specific density; the same volume of flour and water will not have the same mass.
Use x for the value in lb, b for the intermediate value in kg, and y for the result in kg.
kg = lb × 0.45359237
Worked examples
150 lb ≈ 68.0388555 kg
Step 1: (150 × 0.45359237) ≈ 68.0388555 kg.
Step 2: 68.0388555 ÷ 1 ≈ 68.0388555 kg.300 lb ≈ 136.077711 kg
Step 1: (300 × 0.45359237) ≈ 136.077711 kg.
Step 2: 136.077711 ÷ 1 ≈ 136.077711 kg.
Results are rounded to 12 significant digits. Converting units does not increase the precision of the original measurement. Very large or small values outside JavaScript’s finite numeric range are rejected.
About Pounds
The international avoirdupois pound is exactly 0.45359237 kilograms and contains 16 avoirdupois ounces. It is not a troy pound.
About Kilograms
The kilogram is the SI base unit of mass. The Weight category converts mass measurements; it does not calculate gravitational force.
Definitions and sources
Use mass units consistently
Pounds and ounces here are avoirdupois units: 16 ounces make one pound. Enter 8 pounds 8 ounces as 8.5 pounds, rather than 8.8 pounds. Precious metals may use troy ounces, which are not included here.
A weight conversion preserves mass. It cannot tell you how many cups an ingredient fills without knowing its density and how it was measured. Use a kitchen scale when a recipe specifies mass.
Keeping ingredients in the same mass unit also makes it easier to compare quantities in recipe calculations.
Pounds to kilograms reference table
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 | 0.45359237 |
| 5 | 2.26796185 |
| 10 | 4.5359237 |
| 25 | 11.33980925 |
| 50 | 22.6796185 |
| 100 | 45.359237 |
| 1000 | 453.59237 |
Browse every weight and mass conversion →