Weight & Mass Converter
Convert kilograms, pounds, grams, and ounces with instant results.
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Choose the unit you have and the unit you need.
About This Tool
Why use Weight & Mass Converter?
Convert between milligrams, grams, kilograms, metric tons, ounces and pounds. The pound is defined as exactly 0.45359237 kg and the ounce as one sixteenth of a pound, so every conversion here is exact before rounding.
One kilogram is about 2.205 pounds, which is why airline limits quoted as 23 kg appear as 50 lb. In cooking, 100 g is about 3.5 oz and 1 lb is 454 g — worth remembering when following a US recipe with a metric scale.
Key Benefits
Metric and imperial
Milligrams to metric tons alongside ounces and pounds, covering kitchen, gym and shipping use.
Exact definitions
The pound and ounce are defined in terms of the kilogram, so results are precise.
Fast switching
Change either unit and the conversion recalculates as you type.
How to use Weight & Mass Converter
- 1
Choose the unit you have and the unit you need.
- 2
Enter the value and read the result immediately.
- 3
Swap the units for the reverse conversion.
- 4
For body weight in stones, convert to pounds and divide by 14.
Best use cases
Convert body weight between kilograms and pounds.
Follow a recipe written in the other measurement system.
Check luggage weight against an airline limit.
Convert shipping weights for a courier form.
Weight & Mass Converter FAQs
How many pounds is 1 kilogram?
2.20462 lb. To convert pounds to kilograms, multiply by 0.453592.
How many grams are in an ounce?
28.3495 g for the standard (avoirdupois) ounce used for food. A troy ounce, used for precious metals, is 31.1035 g.
How do I convert kilograms to stones?
Divide by 6.35029. 70 kg is 11.02 stone, which is 11 stone and about 0.3 lb.
Is weight the same as mass?
Strictly no — mass is measured in kilograms and weight is a force in newtons. In everyday use the two are used interchangeably, which is what these units assume.
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