Weight converter
Convert mass ("weight" in everyday speech) between metric and imperial units. The avoirdupois pound is exactly 0.453 592 37 kg.
US customary and British imperial units with the same name differ in size. Each is labelled US or UK in the unit list.
1 kilogram = 2.2046 pounds
How it’s calculated
lb = kg × 2.204622622
- Multiply the value in kilograms by 2.204622622.
- To go back, divide by 2.204622622 (or multiply by 0.45359237).
- 1 kg = 2.204622622 lb · 1 lb = 0.45359237 kg
Show worked solutionFactor, unit cancellation and rounding, step by step
Find the conversion factor
By definition 1 lb = 0.45359237 kg. Source: BIPM SI Brochure (9th ed.); NIST SP 811 / Handbook 44.
Multiply by the factor written as a fraction
Put kg in the denominator so it cancels, leaving lb.
Calculate (unrounded)
Round the answer
Rounded to 5 significant figures.
Answer: 2.2046 lb
1 kg in other units
Batch convert kg → lb
- 1 kg = 2.2046 lb
- 5 kg = 11.023 lb
- 10 kg = 22.046 lb
- 25 kg = 55.116 lb
Common weight conversions
Weight units and exact definitions
| Unit | System | Definition |
|---|---|---|
| Kilogram (kg) | SI (metric) | Base unit |
| Gram (g) | SI (metric) | 1 g = 0.001 kg |
| Milligram (mg) | SI (metric) | 1 mg = 0.000001 kg |
| Microgram (µg) | SI (metric) | 1 µg = 1e-9 kg |
| Tonne (metric ton) (t) | metric (non-SI) | 1 t = 1000 kg |
| Pound (lb) | US & imperial (identical) | 1 lb = 0.45359237 kg |
| Ounce (oz) | US & imperial (identical) | 1 oz = 0.02834952313 kg |
| Stone (st) | British imperial | 1 st = 6.35029318 kg |
| US short ton (ton (US)) | US customary | 1 ton (US) = 907.18474 kg |
| UK long ton (ton (UK)) | British imperial | 1 ton (UK) = 1016.046909 kg |
| Troy ounce (oz t) | other | 1 oz t = 0.0311034768 kg |
| Grain (gr) | US & imperial (identical) | 1 gr = 0.00006479891 kg |
| Carat (metric) (ct) | metric (non-SI) | 1 ct = 0.0002 kg |
| Slug (slug) | US & imperial (identical) | 1 slug = 14.59390294 kg |
Kilograms to pounds conversion table
| Kilograms (kg) | Pounds (lb) |
|---|---|
| 0.1 kg | 0.22046 lb |
| 0.5 kg | 1.1023 lb |
| 1 kg | 2.2046 lb |
| 2 kg | 4.4092 lb |
| 3 kg | 6.6139 lb |
| 4 kg | 8.8185 lb |
| 5 kg | 11.023 lb |
| 6 kg | 13.228 lb |
| 7 kg | 15.432 lb |
| 8 kg | 17.637 lb |
| 9 kg | 19.842 lb |
| 10 kg | 22.046 lb |
| 15 kg | 33.069 lb |
| 20 kg | 44.092 lb |
| 25 kg | 55.116 lb |
| 30 kg | 66.139 lb |
| 40 kg | 88.185 lb |
| 50 kg | 110.23 lb |
| 75 kg | 165.35 lb |
| 100 kg | 220.46 lb |
| 250 kg | 551.16 lb |
| 500 kg | 1,102.3 lb |
| 1,000 kg | 2,204.6 lb |
Frequently asked questions
Which weight units can I convert?
kilograms (kg), grams (g), milligrams (mg), micrograms (µg), tonnes (t), pounds (lb), ounces (oz), stone (st), US short tons (ton (US)), UK long tons (ton (UK)), troy ounces (oz t), grains (gr), carats (ct).
How accurate are the results?
Every unit is stored with its exact defining factor (NIST SP 811, NIST Handbook 44 or the BIPM SI Brochure). Calculations use double-precision arithmetic and are rounded only for display, to 5 significant figures by default (trailing zeros dropped, so 1 km shows as 1000 m). You can choose Auto (up to 10 digits), fixed decimals or more significant figures, or switch to scientific or engineering notation.
Why do US and UK (imperial) units give different answers?
Several units share a name but not a size. A US gallon is exactly 3.785411784 L while an imperial gallon is exactly 4.54609 L; a US fluid ounce is about 29.57 mL and a UK fluid ounce about 28.41 mL. Units are labelled US or UK throughout so you can pick the right one.