Weight & Mass Converter

Weight & Mass Converter

Local Processing

Convert between metric and imperial weight and mass units including milligram, gram, kilogram, tonne, ounce, pound, stone, and carat.

How It Works & Processing Standards

Convert between the units listed below using kg as the base unit.

mg1 mg = 0.000001 kg
g1 g = 0.001 kg
t1 t = 1000 kg
oz1 oz = 0.02835 kg
lb1 lb = 0.453592 kg
st1 st = 6.350293 kg
ct1 ct = 0.0002 kg

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Turns body weight, parcel weight or ingredients into other countries’ units using exact definitions such as 1 lb = 0.45359237 kg.

How to Use Weight & Mass Converter

  1. 1
    Enter a valueDecimals and negative numbers (for temperature, say) are accepted.
  2. 2
    Choose unitsPick the unit you have and the unit you want. The swap button reverses the direction.
  3. 3
    Read, copy or shareResults show up to six decimal places. Copy them or create a share link with the same value.

Examples

70 kg in pounds
Input: 70 kg → lb
Result: 154.323584
An 8 oz steak in grams
Input: 8 oz → g
Result: 226.796185

Common Use Cases

  • Recipe ounces and pounds in grams
  • International shipping weight limits in kg
  • Gem weights in carats as grams

Frequently Asked Questions (FAQ)

How much is a carat?

Exactly 0.2 g.

Is this the ounce used for gold?

No. This is the avoirdupois ounce (about 28.35 g), not the troy ounce for precious metals (about 31.1 g).

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