At One Place

Pounds to kilograms

1 pound in kilograms
1 lb = 0.45359 kg
kg = lb × 0.45359237

To convert pounds to kilograms, multiply by 0.45359237. The table below gives the values people look up most often, and the converter works for any number.

Pounds to kilograms table

Common pound values converted to kilograms.
Pounds Kilograms
1 lb 0.45359
2 lb 0.90718
3 lb 1.360777
4 lb 1.814369
5 lb 2.267962
10 lb 4.535924
15 lb 6.803886
20 lb 9.071847
25 lb 11.33981
30 lb 13.60777
40 lb 18.14369
50 lb 22.67962
75 lb 34.01943
100 lb 45.35924
250 lb 113.3981
500 lb 226.7962
1,000 lb 453.5924

How the conversion works

The relationship is kg = lb × 0.45359237. Both units measure mass, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

Common questions

How many kilograms are in one pound?
One pound equals 0.45359 kilograms. kg = lb × 0.45359237.
How do you convert pounds to kilograms?
Use kg = lb × 0.45359237. So 10 lb is 4.535924 kg.
How many pounds are in one kilogram?
One kilogram equals 2.204623 pounds, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked