Lbs to Kg Converter
Created by: Ethan Brooks Conversion Specialist
Last updated:
To convert lbs to kg, multiply by 0.4536 (or divide by 2.2046). 100 lb is 45.4 kg, 150 lb is 68.0 kg and 200 lb is 90.7 kg. To go from kg to lbs, multiply by 2.2046: 70 kg is 154.3 lb. Enter pounds or kilograms below, or use the charts.
Lbs to Kg Converter
Conversion1 lb = 0.4536 kg. Switch direction to convert kilograms to pounds.
Lbs to kg conversion chart
kg = lb × 0.45359237. lb = kg × 2.20462.
| Pounds (lb) | Kilograms (kg) |
|---|---|
| 1 lb | 0.4536 kg |
| 2 lb | 0.9072 kg |
| 5 lb | 2.268 kg |
| 7.5 lb | 3.4019 kg |
| 10 lb | 4.5359 kg |
| 15 lb | 6.8039 kg |
| 20 lb | 9.0718 kg |
| 25 lb | 11.3398 kg |
| 30 lb | 13.6078 kg |
| 40 lb | 18.1437 kg |
| 45 lb | 20.4117 kg |
| 50 lb | 22.6796 kg |
| 100 lb | 45.3592 kg |
| 110 lb | 49.8952 kg |
| 120 lb | 54.4311 kg |
| 130 lb | 58.967 kg |
| 140 lb | 63.5029 kg |
| 150 lb | 68.0389 kg |
| 160 lb | 72.5748 kg |
| 170 lb | 77.1107 kg |
| 180 lb | 81.6466 kg |
| 190 lb | 86.1826 kg |
| 200 lb | 90.7185 kg |
| 220 lb | 99.7903 kg |
| 250 lb | 113.3981 kg |
| 300 lb | 136.0777 kg |
| Kilograms (kg) | Pounds (lb) |
|---|---|
| 1 kg | 2.2046 lb |
| 2 kg | 4.4092 lb |
| 2.5 kg | 5.5116 lb |
| 5 kg | 11.0231 lb |
| 10 kg | 22.0462 lb |
| 15 kg | 33.0693 lb |
| 20 kg | 44.0925 lb |
| 23 kg | 50.7063 lb |
| 25 kg | 55.1156 lb |
| 32 kg | 70.5479 lb |
| 40 kg | 88.1849 lb |
| 45 kg | 99.208 lb |
| 50 kg | 110.2311 lb |
| 55 kg | 121.2542 lb |
| 60 kg | 132.2774 lb |
| 65 kg | 143.3005 lb |
| 70 kg | 154.3236 lb |
| 75 kg | 165.3467 lb |
| 80 kg | 176.3698 lb |
| 85 kg | 187.3929 lb |
| 90 kg | 198.416 lb |
| 100 kg | 220.4623 lb |
| 120 kg | 264.5547 lb |
How to convert pounds to kilograms
kg = lb × 0.45359237
lb = kg ÷ 0.45359237 ≈ kg × 2.20462
For mental math, divide by 2.2. 165 lb ÷ 2.2 = 75 kg, which is within 0.1% of the exact 74.84 kg. Dividing by 2 alone overstates the result by about 10%.
Where you see kilograms
- Airline baggage: 23 kg (50.7 lb) checked, 7 to 10 kg (15.4 to 22 lb) carry-on on many carriers.
- Weightlifting plates: a 20 kg barbell is 44.1 lb; a 25 kg plate is 55.1 lb.
- Medicine: doses are often written per kilogram of body weight (mg/kg).
- Newborn weights outside the US: 3.4 kg is about 7 lb 8 oz.
Frequently Asked Questions
How do I convert lbs to kg?
Multiply pounds by 0.45359237, or divide by 2.20462. 150 lb × 0.4536 = 68.0 kg. For a quick estimate, halve the pounds and subtract 10%: 150 ÷ 2 = 75, minus 7.5 = 67.5 kg.
How many kg is 1 lb?
One pound is exactly 0.45359237 kg (453.6 grams). One kilogram is 2.2046 pounds.
How many kg is 200 lbs?
200 lb is 90.7 kg. 180 lb is 81.6 kg, and 250 lb is 113.4 kg.
How many lbs is 50 kg?
50 kg is 110.2 lb. A common checked-bag limit of 23 kg is 50.7 lb, and 32 kg is 70.5 lb.
How do I convert lbs and ounces to kg?
Turn the ounces into a fraction of a pound first (ounces ÷ 16), add it to the pounds, then multiply by 0.4536. A 7 lb 8 oz baby is 7.5 lb × 0.4536 = 3.40 kg.
Why is the factor 0.45359237 exactly?
In 1959 the US, UK and other Commonwealth countries agreed to define the pound by the kilogram, fixing 1 lb at exactly 0.45359237 kg. The factor is a definition, not a measurement.
Sources and References
- NIST Handbook 44, Appendix C: General Tables of Units of Measurement. 1 avoirdupois pound = 0.453 592 37 kilogram exactly.
- NIST Special Publication 811. Appendix B: conversion factors for mass.