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Metric to imperial mass converter

Convert grams, kilograms and metric tonnes to imperial and US customary units: grain, ounce, pound, stone, short hundredweight (US), long hundredweight (UK), short ton (US) and long ton (UK), and back.

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Pound

2.204622622 lb

Equivalents

Metric tonne0.001 t
Kilogram1 kg
Gram1000 g
Grain15432.35835 gr
Ounce35.27396195 oz
Pound2.204622622 lb
Stone0.1574730444 st
Short hundredweight (US)0.02204622622 sh cwt
Long hundredweight (UK)0.01968413055 long cwt
Short ton (US)0.001102311311 sh tn
Long ton (UK)0.0009842065276 long tn

They all derive from the avoirdupois pound, fixed in 1959 at exactly 453.59237 g:

  • 1 grain = 64.79891 mg (1 pound = 7000 grains)
  • 1 ounce = 1/16 pound ≈ 28.35 g
  • 1 stone = 14 pounds ≈ 6.35 kg
  • Short hundredweight (US) = 100 pounds; long hundredweight (UK) = 112 pounds
  • Short ton (US) = 2000 pounds ≈ 907.18 kg; long ton (UK) = 2240 pounds ≈ 1016.05 kg

Use cases

  • Following recipes in ounces and pounds.
  • Understanding body weights in stone or pounds.
  • Comparing loads given in short or long tons.

How it works

  1. 1

    Type the amount

    Decimals with a dot or a comma are accepted, as are negative values.

  2. 2

    Pick the units

    Choose the source and target units; the result and the equivalents table update instantly.

Technical details

  • The ounce is the avoirdupois ounce (food and parcels), not the troy ounce used for precious metals (31.1 g).
  • Results use 10 significant figures; very large or very small values are shown in scientific notation (e.g. 1e-10).

Frequently asked questions

How many grams are in a pound?

Exactly 453.59237 g, a little under half a kilogram.

Why are there short and long tons?

The US defined the hundredweight as 100 pounds and the UK as 112; a ton is 20 hundredweights in both, giving 2000 and 2240 pounds.

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