Weight and Mass Unit Converter
Convert between metric and imperial units of mass — grams, kilograms, tonnes, ounces, pounds, stones, and both US and imperial tons — using the exact international avoirdupois pound. The result updates as you type.
Conversion reference
| From | To | Result |
|---|---|---|
| 1 kg | Pound (lb) | 2.20462262185 lb |
| 1 kg | Ounce (oz) | 35.2739619496 oz |
| 1 kg | Gram (g) | 1000 g |
| 1 lb | Kilogram (kg) | 0.45359237 kg |
| 1 lb | Gram (g) | 453.59237 g |
| 1 lb | Ounce (oz) | 16 oz |
| 1 t | US ton (short) (ton (US)) | 1.10231131092 ton (US) |
| 1 t | Imperial ton (long) (ton (UK)) | 0.984206527611 ton (UK) |
| 1 t | Kilogram (kg) | 1000 kg |
| 1 st | Kilogram (kg) | 6.35029318 kg |
| 1 st | Pound (lb) | 14 lb |
Values are generated by the converter engine, at Auto precision.
About this converter
The converter expresses both units in kilograms and takes the ratio. The imperial units are anchored to the international avoirdupois pound, 0.45359237 kg exactly, so pounds, ounces, stones, and tons all convert without rounding error.
Mass vs weight: everyday speech says “weight” for what is really mass. Mass (kilograms) does not change with location; weight is the downward force that mass experiences in gravity and is measured in newtons. This tool handles mass — for force, use the Engineering converter.
How to use it
- Type the quantity you want to convert in the Value field.
- Choose the unit to convert from and the unit you want the answer in.
- Read the result, Copy it, or press Swap to reverse the direction.
- Set Precision to a fixed number of decimals if you want a rounded figure for a label or form.
The result updates as you type — there is no Calculate button. Use Swap to reverse the two units, and Reset to return to the defaults.
Formula and common values
value_in_target = value_in_source × (source_kg ÷ target_kg).
- 1 kilogram = 1000 grams = 2.2046226218 pounds = 35.27396195 ounces
- 1 pound = 0.45359237 kilograms = 16 ounces (exact)
- 1 stone = 14 pounds ≈ 6.35029318 kilograms
- 1 metric ton = 1000 kg ≈ 1.1023 US tons ≈ 0.9842 imperial tons
FAQ
How many pounds are in a kilogram?
One kilogram is about 2.2046226218 pounds. The pound is defined as 0.45359237 kilograms exactly, so 1 kg = 1 / 0.45359237 lb.
Is this converting weight or mass?
Mass. Kilograms, grams, pounds, ounces, stones, and tons are all units of mass here. In everyday language "weight" is used for what is technically mass; true weight is a force (mass × gravity) and is measured in newtons — see the Engineering converter for force units.
What is the difference between a US ton and an imperial ton?
A US (short) ton is 2000 pounds ≈ 907.18 kg. An imperial (long) ton is 2240 pounds ≈ 1016.05 kg. A metric ton (tonne) is 1000 kg, close to but not equal to either.
How many grams are in an ounce?
One avoirdupois ounce is 28.349523125 grams exactly (a sixteenth of a pound). This is not the same as a troy ounce, used for precious metals, which is about 31.103 g.
Don't see the tool you need?
Goeroe Digital builds custom calculators, generators, and business tools on request.
Request a Custom ToolThis is a free tool provided by Goeroe Digital. All results, generated files, and figures are estimates or drafts for general informational use only. Goeroe Digital accepts no responsibility or liability for any output, outcome, loss, or decision arising from the use of these free tools — always review the results yourself before relying on them.