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Pounds are the imperial unit of weight; kilograms the metric one. Bodyweight, gym plates, luggage and shipping all cross between them, so this converter turns pounds into kilograms and back with a fixed factor.
lbs to kg Converter: step-by-step worked example
What is a body weight of 150 lb in kilograms?
- Value
- 150
- Direction
- Pounds → Kilograms
- 1
Conversion factor (definition)
1 lb = 0.45359237 kg (1959, exact) → 1 kg = 1 ÷ 0.45359237 ≈ 2.2046226218 lb
1 kg = 2.2046226218 lb = 2.2046 lb
- 2
Inverse factor
1 lb = 1 ÷ 2.2046226218 kg
1 ÷ 2.2046226218 = 0.4536 kg
- 3
Conversion
kg → lb: × 2.2046226218 · lb → kg: ÷ 2.2046226218
150 lb ÷ 2.2046226218 = 68.0389 kg
- 4
Check (reverse direction)
Convert the result back with the inverse operation
68.0389 kg × 2.2046226218 = 150.0001 lb
- kg68.0389
- lb150
- st10.7143
Good to know: Quick estimate: kg × 2.2 ≈ lb. A 45 lb gym plate is 20.4 kg, not 20 kg; in the UK body weight is often given in stone (1 st = 14 lb).
lbs to kg Converter — how it works
The conversion factor
1 pound = 0.453592 kilograms (and 1 kg = 2.20462 lb).
| To convert | Do this |
|---|---|
| lb → kg | multiply by 0.453592 |
| kg → lb | multiply by 2.20462 |
Common values
| Pounds | Kilograms |
|---|---|
| 1 lb | 0.45 kg |
| 10 lb | 4.54 kg |
| 100 lb | 45.36 kg |
| 150 lb | 68.04 kg |
Worked example
A 150 lb person weighs 150 × 0.453592 = 68.0 kg. A 45 lb barbell plate is 45 × 0.453592 = 20.4 kg, close to the 20 kg metric plate.
Kilograms to pounds table
| Kilograms | Pounds (lb) |
|---|---|
| 1 | 2.2 |
| 2 | 4.41 |
| 5 | 11.02 |
| 10 | 22.05 |
| 20 | 44.09 |
| 50 | 110.23 |
| 60 | 132.28 |
| 70 | 154.32 |
| 80 | 176.37 |
| 90 | 198.42 |
| 100 | 220.46 |
Pounds to kilograms table
| Pounds (lb) | Kilograms |
|---|---|
| 1 | 0.45 |
| 5 | 2.27 |
| 10 | 4.54 |
| 20 | 9.07 |
| 50 | 22.68 |
| 100 | 45.36 |
| 150 | 68.04 |
| 200 | 90.72 |
Frequently asked questions
How many kg is 1 pound?+
One pound is 0.453592 kilograms — a little under half a kilo. To convert pounds to kilograms, multiply by 0.453592 (or divide by 2.20462).
How do I convert lbs to kg?+
Multiply the pound value by 0.453592, or divide by 2.20462. For a quick estimate, halve it and take off a little: 100 lb ≈ 45 kg.
How do I convert kg back to pounds?+
Multiply the kilogram value by 2.20462. So 70 kg × 2.20462 = 154.3 lb.
What is 200 lbs in kg?+
200 pounds is 90.7 kilograms. Conversely, 90 kg is about 198.4 lb.
Is the conversion exact?+
The factor 0.45359237 kg per pound is exact by definition, so the conversion is precise; results are just rounded for display.
About this page
- Publisher:
- Kalkoro — Teknolojig Bilişim Teknolojileri A.Ş., İstanbul
- Written by:
- Ahmet Tur — Editor (Math, date & time, unit conversion, physics & chemistry, everyday tools)
- Reviewed by:
- Kübra Yıldız — Editor
Parameters come from official sources; the last update date is shown at the bottom of the page.
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Results are for information only. For official matters the relevant authority's calculation prevails.
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