Weight converter
Convert mass between kg, g, mg, lb, oz and metric tonnes with exact factors: 1 lb = 453.59237 g. Example: 2.5 kg is 5.511557 lb.
What to know
The weight page converts six units: kilogram, gram, milligram, pound, ounce and metric tonne. Values pass through kilograms using these exact factors: 1 lb = 0.45359237 kg, 1 oz = 0.028349523125 kg, 1 g = 0.001 kg, 1 mg = 0.000001 kg and 1 t = 1,000 kg.
Worked example: 2.5 kg to lb is 2.5 / 0.45359237 = 5.511557 lb. For a baking recipe, 8 oz to g is 8 x 28.349523125 = 226.796185 g, and a 1,000 kg load is exactly 1 t.
The ounce here is the avoirdupois ounce used for food, mail and body weight. It is not the troy ounce used for gold, and the stone and the US short ton are not offered, so convert them by hand if your source uses them.
Strictly speaking these are mass units. On Earth the difference from weight as a force does not matter for scales and shipping labels, which is why everyday tools label the result as weight.
Body-weight conversions are the most common request. A person weighing 70 kg is 154.323584 lb, and a parcel of 5 lb is 2.26796185 kg, shown as 2.267962 after rounding to 6 decimals.
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How to use Weight converter
- Enter 2.5 in the Value field.
- Select kg in From and lb in To.
- Read the Result line, which shows 5.511557 lb.
- Switch To to oz to see 88.184905 oz for the same mass.
Quick answers
How many grams are in a pound?
Exactly 453.59237 g. Pick lb to g and enter 1.
Is the ounce here the troy ounce used for gold?
No. It is the avoirdupois ounce of 28.349523125 g. Troy ounces weigh about 31.1 g and are not included.
How many kilograms is 150 lb?
68.038856 kg, calculated as 150 x 0.45359237.