1 lb in kg
1 × 0.45359237
0.4536 kg
LBS to KG Converter
Convert lbs to kg instantly — a free pounds to kilograms converter with a full lbs to kg chart and the exact reverse formula. One pound equals 0.45359237 kilograms.
lb
kg
Edit either value — the other field updates instantly.
Result
68.0389 kg
1 lb = 0.45359237 kg
Values update as you type. Swap units to reverse the direction.
lb to kg formula
1 lb = 0.45359237 kg
Reverse: kilograms × 2.2046226218 = pounds
“lbs” and “lb” both mean pound — the plural and singular abbreviations of the same unit of weight. Converting lbs to kg means multiplying by 0.45359237, the exact number of kilograms in one international avoirdupois pound. This is the direction people need most often when reading a US label, a gym plate, or a body-weight number and then reporting it in metric: 150 lbs is 68.04 kg, and 200 lbs is 90.72 kg. The exact factor is a definition, not an approximation, so results are identical whether you call the unit pounds, pounds-mass or lbs. To go from kilograms back to pounds, multiply by 2.2046226218 — or use the kg to lbs converter. The same chart also answers the reversed reading, listed in the third column below, so “150 kg to lbs” is covered without leaving the page.
Definition source: NIST SI mass guidance.
Worked examples
100 lbs in kg
100 × 0.45359237
45.3592 kg
150 lbs in kg
150 × 0.45359237
68.0389 kg
200 lbs in kg
200 × 0.45359237
90.7185 kg
LBS to KG chart
| Pounds (lbs) | Kilograms (kg) | Kilograms back to lbs |
|---|---|---|
| 1 lb | 0.45 kg | 1 kg = 2.2046 lb |
| 2 lb | 0.91 kg | 2 kg = 4.4092 lb |
| 5 lb | 2.27 kg | 5 kg = 11.0231 lb |
| 10 lb | 4.54 kg | 10 kg = 22.0462 lb |
| 20 lb | 9.07 kg | 20 kg = 44.0925 lb |
| 25 lb | 11.34 kg | 25 kg = 55.1156 lb |
| 50 lb | 22.68 kg | 50 kg = 110.2311 lb |
| 75 lb | 34.02 kg | 75 kg = 165.3467 lb |
| 100 lb | 45.36 kg | 100 kg = 220.4623 lb |
| 110 lb | 49.90 kg | 110 kg = 242.5085 lb |
| 120 lb | 54.43 kg | 120 kg = 264.5547 lb |
| 130 lb | 58.97 kg | 130 kg = 286.6009 lb |
| 140 lb | 63.50 kg | 140 kg = 308.6472 lb |
| 150 lb | 68.04 kg | 150 kg = 330.6934 lb |
| 160 lb | 72.57 kg | 160 kg = 352.7396 lb |
| 170 lb | 77.11 kg | 170 kg = 374.7858 lb |
| 180 lb | 81.65 kg | 180 kg = 396.8321 lb |
| 190 lb | 86.18 kg | 190 kg = 418.8783 lb |
| 200 lb | 90.72 kg | 200 kg = 440.9245 lb |
| 220 lb | 99.79 kg | 220 kg = 485.0170 lb |
| 250 lb | 113.40 kg | 250 kg = 551.1557 lb |
| 300 lb | 136.08 kg | 300 kg = 661.3868 lb |
Every row is calculated from the exact published definition. The third column reads the same value in the opposite direction, so the reverse conversion needs no second page.
Common lbs to kg conversions
1 lbs to kg
1 pounds equals 0.45 kilograms (1 × 0.45359237).
10 lbs to kg
10 pounds equals 4.54 kilograms (10 × 0.45359237).
100 lbs to kg
100 pounds equals 45.36 kilograms (100 × 0.45359237).
150 lbs to kg
150 pounds equals 68.04 kilograms (150 × 0.45359237).
200 lbs to kg
200 pounds equals 90.72 kilograms (200 × 0.45359237).
300 lbs to kg
300 pounds equals 136.08 kilograms (300 × 0.45359237).
Frequently asked questions
How many kg is 1 lb?
One pound equals exactly 0.45359237 kilograms. Multiply any pound value by that factor to get kilograms.
Is lbs the same as pounds?
Yes. “lb” is the singular abbreviation and “lbs” the plural — both mean pound. LBS to KG and pounds to kilograms are the same conversion.
What is 150 lbs in kg?
150 pounds equals 68.0389 kilograms (150 × 0.45359237). Read the same value from the chart on this page.
What is 200 lbs in kg?
200 pounds equals 90.7185 kilograms. Type 200 in the pounds box above for the live result.
What is the lbs to kg formula?
Kilograms = pounds × 0.45359237. To reverse it, kilograms × 2.2046226218 = pounds.
Why is the factor 0.45359237 and not 0.45?
0.45359237 is the exact number of kilograms in one international avoirdupois pound. Rounding to 0.45 introduces about a 0.8% error, which matters for shipping and medical figures.
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Disclaimer
Conversion results use published unit definitions and are rounded for display. Verify critical engineering, medical, legal, or trade measurements with the relevant authority. Review our calculation methodology and full disclaimer.