How it works
Convert kilograms to pounds or pounds to kilograms instantly, with the exact conversion factor and a compact reference table.
Choose the conversion direction, enter a weight and pick how many decimal places you need. One international pound equals exactly 0.45359237 kilograms, so the same exact factor is used in both directions. The reference table lists common values around your entry; 0 and decimal inputs are accepted.
Formula
lb = kg ÷ 0.45359237 and kg = lb × 0.45359237 (1 lb = 0.45359237 kg exactly).
kg- Mass in kilograms (kg)
lb- Mass in pounds (lb)
c- Exact conversion factor (0.45359237 kg per lb)
Examples
- 70 kg in poundsWeight 70 kg · convert kg → lb · 4 decimals≈ 154.3236 lb
- 154.3236 lb in kilogramsWeight 154.3236 lb · convert lb → kg · 4 decimals≈ 70 kg
Frequently asked questions
Why 0.45359237?
That is the exact definition of the international avoirdupois pound, adopted in 1959, so results do not depend on a rounded approximation.
How many decimals should I use?
Four decimals is enough for most uses; two or three are fine for everyday weights. The precision selector changes the displayed result and the table.
Can I convert 0 or decimal weights?
Yes. 0 kg is 0 lb and decimal values are converted exactly like whole numbers.
Does this convert ounces or stones?
No — this page converts only kilograms and pounds.
How to read the result
The result is the same mass expressed in the other unit. Multiply kilograms by about 2.20462 to get pounds, or divide pounds by the same factor to get kilograms.
Limitations
Rounding is applied only to the displayed result; the conversion itself uses the exact factor. Very large values are limited by the input range (up to one billion).
Source: International avoirdupois pound = 0.45359237 kg (exact, 1959 agreement).