Weight Converter
Convert between grams, kilograms, tonnes, ounces, pounds, stones and tons.
Processing: This tool runs entirely in your browser. Your input and any file you open stay on your device — nothing is uploaded to a server.
How to use the weight converter
- Type the amount you want to convert.
- Choose the unit you have and the unit you want.
- Read the result, or use the table showing all 9 units at once.
About this tool
A pound is defined as exactly 0.45359237 kilograms, so metric and imperial weights convert exactly. The units that cause confusion are the tons: a US ton is 2,000 pounds, an imperial (long) ton is 2,240 pounds, and a metric tonne is 1,000 kilograms — three different weights sharing one word.
Stones remain the everyday unit for body weight in the UK and Ireland, which is why they are included alongside the more formal units.
Common uses
- Converting body weight between kilograms, pounds and stones.
- Checking a shipping weight given in the other system.
- Following a recipe that measures in ounces.
Frequently asked questions
- How many pounds are in a kilogram?
- About 2.20462. The exact relationship is defined the other way: one pound is exactly 0.45359237 kg.
- What is the difference between a ton and a tonne?
- A tonne is 1,000 kg. A US ton is about 907 kg and an imperial ton about 1,016 kg — all three are offered here separately.
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