If there are ounces, divide them by 16 and add them to the pounds.
Multiply the pounds by 0.45359237 to get kilograms; multiply by 1,000 for grams.
Worked example
180 lb × 0.45359237 = 81.65 kg. A 5 lb bag of flour is 2.27 kg, and a 50 lb suitcase is 22.68 kg.
lbs to kg chart
Pounds to kilograms, rounded to 2 decimals
lb
kg
1 lb
0.45 kg
2 lb
0.91 kg
5 lb
2.27 kg
8 lb
3.63 kg
10 lb
4.54 kg
20 lb
9.07 kg
25 lb
11.34 kg
40 lb
18.14 kg
50 lb
22.68 kg
100 lb
45.36 kg
110 lb
49.9 kg
120 lb
54.43 kg
130 lb
58.97 kg
140 lb
63.5 kg
150 lb
68.04 kg
160 lb
72.57 kg
170 lb
77.11 kg
180 lb
81.65 kg
190 lb
86.18 kg
200 lb
90.72 kg
210 lb
95.25 kg
220 lb
99.79 kg
230 lb
104.33 kg
240 lb
108.86 kg
250 lb
113.4 kg
260 lb
117.93 kg
270 lb
122.47 kg
280 lb
127.01 kg
290 lb
131.54 kg
300 lb
136.08 kg
The pound is exactly 0.45359237 kg by definition, so these conversions are exact to the decimals shown. Everything runs in your browser.
Frequently asked questions
How many kilograms are in a pound?
Exactly 0.45359237 kg. That's the definition of the international pound, agreed in 1959, so a pound is a little under half a kilogram.
How do I convert lbs to kg?
Multiply by 0.45359237. For 150 lb: 150 × 0.45359237 = 68.04 kg. Dividing by 2.20462 gives the same answer.
How do I convert pounds and ounces to kg?
Turn the ounces into pounds first (16 oz in a pound), then multiply by 0.45359237. 7 lb 8 oz is 7.5 lb, which is 3.4 kg; enter 7 pounds and 8 ounces above to get it directly.
Is there a quick way to convert lbs to kg in my head?
Halve it and take away a tenth of the result: 200 lb → 100 − 10 = 90 kg, against the exact 90.72 kg.
Why is pound written lb?
From the Latin libra, a Roman unit of weight; the same root gives the £ sign. lbs is the common plural, though lb is used for both.
