Weight Converter

Convert between kilograms, pounds, grams, ounces, tonnes and stone

Enter Weight

Value

Unit

All Conversions

Key Formulas

1 kg = 2.20462 lbs

1 lb = 16 oz = 453.592 g

1 stone = 14 lbs = 6.35029 kg

1 tonne = 1000 kg

How Weight Conversion Works

Weight (mass) conversion uses fixed ratios based on the kilogram as the SI base unit of mass.

Metric Units

Metric: milligram (mg), gram (g), kilogram (kg), tonne (t). Each step is a factor of 1000.

Imperial Units

Imperial: ounce (oz), pound (lb), stone (st). 16 oz = 1 lb, 14 lbs = 1 stone.

Frequently Asked Questions

How many pounds are in a kilogram?

There are approximately 2.20462 pounds in one kilogram.

How many grams are in an ounce?

There are approximately 28.3495 grams in one ounce.

What is a stone in weight?

A stone is 14 pounds or about 6.35 kilograms. Commonly used in the UK and Ireland for body weight.

What is the difference between mass and weight?

Mass measures the amount of matter (in kg), weight is the force of gravity on that mass. On Earth's surface they are proportional.

Go deeper

Read the SnoopTool guide behind this tool

The calculator gives you the number. These SnoopTool guides explain the method, the assumptions and the decision — with worked examples, data tables and FAQs.

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Answers, not just a number

Questions this calculator answers, worked out in full — the number first, then the table and the formula behind it.

How many kg is 1 pound?0.4536 kg — and 1 kg is 2.2046 pounds.

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