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Weight Converter
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// about this tool

Weight Converter Online

Updated 2026-07-09

Convert weight and mass online for free between kilograms, grams, tonnes, pounds, ounces, and stones. Enter a value, pick the units, and SnapTools shows the result instantly. Everything runs in your browser, so nothing you enter is uploaded.

Weight conversions come up everywhere — body weight in stones or kilograms, recipe ingredients in ounces or grams, parcels in pounds. This converter uses the standard international definition (a pound is exactly 0.45359237 kg), so every result is accurate in any direction, whether for the kitchen, the gym, or the shipping label.

// how to use

  1. 1 Enter a weight or mass value in the input panel.
  2. 2 Choose the unit you're converting from and the unit you're converting to.
  3. 3 Read the converted value on the right, then copy it.

// examples

Kilograms to pounds
Input
1 kg → lb
Output
2.2046226 lb
Pounds to kilograms
Input
150 lb → kg
Output
68.038856 kg
Ounces to grams
Input
8 oz → g
Output
226.796 g

// common uses

Converting body weight between kilograms, pounds, and stones Adjusting recipe ingredient weights across systems Shipping and parcel weight conversions Reading product specs given in another unit

// faq

No. The conversion runs entirely in your browser, so nothing you enter leaves your machine.
Grams, kilograms, and tonnes on the metric side, and ounces, pounds, and stones on the imperial side, with conversion in any direction.
About 2.2046226 lb. This converter uses the standard definition (1 lb = 0.45359237 kg), so results are precise rather than rounded.
In everyday use the terms are interchangeable and that is how this tool treats them — it converts between units of mass such as kilograms and pounds, which is what scales report.
Yes. Stones are supported, so you can convert body weight between stones, pounds, and kilograms directly.

// related

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Use this via API

Get a free API key → 
curl -X POST https://snaptools.dev/api/v1/tools/weight-converter \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"value":"1 kg \u2192 lb"}'
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