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Pounds to Kilograms
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Pounds to Kilograms — quick reference

1 lb = 0.4536 kg
Common Pounds to Kilograms conversions
lb kg
1 lb 0.4536 kg
2 lb 0.9072 kg
3 lb 1.3608 kg
5 lb 2.268 kg
10 lb 4.5359 kg
20 lb 9.0718 kg
25 lb 11.3398 kg
50 lb 22.6796 kg
100 lb 45.3592 kg
250 lb 113.3981 kg
500 lb 226.7962 kg
1000 lb 453.5924 kg
// about this tool

Pounds to Kilograms Online

Updated 2026-08-19

Convert pounds to kilograms online for free. Enter a weight in pounds and SnapTools shows the exact value in kilograms instantly, in your browser — nothing is uploaded.

One pound is exactly 0.45359237 kilograms, so you multiply pounds by 0.453592. For quick reference: 1 lb ≈ 0.45 kg, 5 lb ≈ 2.27 kg, 10 lb ≈ 4.54 kg, 100 lb ≈ 45.36 kg, and 150 lb ≈ 68.04 kg. Enter any value above for the precise figure, or use the full Weight Converter for ounces and stones.

// how to use

  1. 1 Type a weight in pounds into the input.
  2. 2 SnapTools shows the value in kilograms instantly as you type.
  3. 3 Copy the result, or open the Weight Converter for ounces, stones, and more.

// examples

Body weight
Input
150
Output
68.0388555
Round number
Input
10
Output
4.5359237

// common uses

Converting body weight from pounds to kg Reading US product weights in metric Shipping and parcel weights across systems Bringing imperial weights into a metric record

// faq

Is my input uploaded to a server?
No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
How many kilograms are in a pound?
One pound is exactly 0.45359237 kilograms, by the international definition. So you multiply pounds by 0.453592 to get kilograms.
How do I convert pounds to kg quickly?
Divide by 2.2 for a close estimate — 150 pounds is about 68 kg. This tool applies the exact factor for a precise result.
Is weight the same as mass here?
In everyday use they are interchangeable, and that is how this tool treats them — it converts between pounds and kilograms, the units a scale reports.
How do I convert stones and pounds first?
Multiply the stones by 14 and add the pounds to get total pounds, then convert — or use the full Weight Converter, which includes stones directly.

// works with your data

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Use this via API

Get a free API key → 
curl -X POST https://thesnaptools.com/api/v1/tools/pounds-to-kg \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"150"}'