How to convert lbs to kg
Example: 150 lb ÷ 2.20462 = 68.0 kg. The fastest mental route: halve the pounds, then take off 10% of that — 150 → 75 → 75 − 7.5 = 67.5 kg, within 1% of exact.
Lbs to kg conversion chart
| lb | kg |
|---|---|
| 1 | 0.5 |
| 2 | 0.9 |
| 5 | 2.3 |
| 1 | 4.5 |
| 15 | 6.8 |
| 2 | 9.1 |
| 25 | 11.3 |
| 3 | 13.6 |
| 4 | 18.1 |
| 5 | 22.7 |
| 75 | 34 |
| 1 | 45.4 |
| 11 | 49.9 |
| 12 | 54.4 |
| 13 | 59 |
| 14 | 63.5 |
| 15 | 68 |
| 16 | 72.6 |
| 18 | 81.6 |
| 2 | 90.7 |
| 22 | 99.8 |
| 25 | 113.4 |
Real-world anchors
- US checked-bag limit: 50 lb = 22.7 kg — just under the international 23 kg standard.
- Dumbbells: the 45 lb plate is 20.4 kg; metric gyms use 20 kg (44.1 lb) plates instead — lifters crossing systems notice their "same" lifts shift slightly.
- Newborns: the classic "7 lb 8 oz" birth weight is 3.4 kg. Ounces are sixteenths of a pound: 8 oz = 0.5 lb.
Pounds and ounces together
To convert a lb-oz weight, turn ounces into a decimal first (divide by 16), then convert: 7 lb 8 oz → 7.5 lb → 3.40 kg. Going the other way, 3.2 kg → 7.05 lb → 7 lb and 0.05 × 16 ≈ 1 oz.
Frequently asked questions
How many kg is 1 pound?
Exactly 0.45359237 kg — about 454 grams. Two important cousins: 1 stone (14 lb) is 6.35 kg, and 1 US ton (2,000 lb) is 907 kg.
How much is 150 lbs in kg?
150 lb = 68.0 kg. Halve it (75) and subtract 10% of that (7.5) for a fast 67.5 — the exact answer sits between.
What's 1 lb in grams?
453.6 g — a hair under half a kilogram. This is why '500 g' and '1 lb' packages of pasta or butter feel interchangeable but aren't quite: the metric pack gives you 10% more.
How do I convert pounds and ounces to kg?
Divide the ounces by 16 to get decimal pounds, add, then multiply by 0.4536. Example: 8 lb 4 oz = 8.25 lb = 3.74 kg.
Why do US scales use pounds?
US customary units descend from British imperial ones, and the 1975 metrication push was voluntary. Medicine and science in the US use kg — which is why hospitals weigh you in one unit and gyms in another.