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Pounds to Grams Converter

Convert pounds to grams exactly — including pounds-and-ounces weights like 7 lb 4 oz, and the stone used for body weight.

Conversion table

WeightIn Grams
0.5226.8 g
1453.59 g
1.5680.39 g
2907.18 g
2.51,133.98 g
31,360.78 g
41,814.37 g
52,267.96 g
62,721.55 g
73,175.15 g
83,628.74 g
94,082.33 g
104,535.92 g
125,443.11 g
156,803.89 g

📊 Pounds You Meet in Real Life

  • 1 oz28.35 g
  • 1/4 lb (4 oz)113.4 g
  • 1/2 lb (8 oz)226.8 g
  • 1 lb (16 oz)453.59 g
  • 5 lb bag of flour2268 g
  • 1 stone (14 lb)6350 g

Reading Pounds Correctly

  • A pound is 16 ounces, not 10. So 1.5 lb is 1 lb 8 oz, and 1 lb 8 oz is 680 g — not 1.8 lb.
  • A weight written 7 lb 4 oz means 7 pounds PLUS 4 ounces. Convert the ounces separately: 7 × 453.59 + 4 × 28.35 = 3289 g.
  • The stone is still standard for body weight in Britain and Ireland: 11 st 6 lb is 72.6 kg.
  • US recipes measure flour and sugar by volume, not weight, so a recipe in cups will not give you a pound figure to convert.

One Pound Is Exactly 453.59237 Grams

That is not a measurement anyone took with a balance. It is a definition, agreed on 1 July 1959 when the standards bodies of the United States, the United Kingdom, Canada, Australia, New Zealand and South Africa signed the International Yard and Pound Agreement. From that date the international avoirdupois pound was fixed at exactly 0.45359237 kilograms, which means the pound is now derived from the kilogram rather than from any physical prototype. That matters more than it sounds: before 1959 the American and British pounds were slightly different numbers, and a shipment certified in one country did not have exactly the same legal weight in the other.

Sixteen Ounces, Not Ten

The single most common mistake with pounds is treating the decimal part as ounces. A pound is divided into 16 ounces, so 1.5 lb is 1 pound and 8 ounces, and a weight reported as 1 lb 8 oz is 680 g, not 1.8 lb. To convert a mixed weight, handle the two parts separately: multiply the whole pounds by 453.59237, multiply the ounces by 28.349523, and add them. Going the other way, divide the grams by 453.59237, keep the whole number as pounds, and multiply what is left over by 16 to get the ounces.

The Divisions Inside a Pound

  • 1 lb = 16 oz = 453.59237 g. The ounce is therefore 28.349523 g exactly.
  • A quarter pound is 4 oz = 113.4 g — the raw weight of a quarter pounder patty before it cooks down.
  • Half a pound is 8 oz = 226.8 g, which is also the weight of one US stick of butter.
  • 1 stone = 14 lb = 6350.29 g. Used for body weight in the UK and Ireland, almost nowhere else.
  • 1 US short ton = 2000 lb = 907.18 kg. The UK long ton is 2240 lb = 1016.05 kg — a 12% difference with the same name.
  • The troy pound of 373.24 g has only 12 ounces and applies solely to precious metals. Never use it for food or shipping.

Where You Will Need This

  • American recipes on a European scale: 1 lb of mince is 454 g, a 5 lb bag of flour is 2268 g.
  • Birth weights, which US and UK hospitals still report in pounds and ounces: 7 lb 4 oz is 3289 g, 8 lb 11 oz is 3941 g.
  • Gym equipment: a 45 lb plate is 20.41 kg, a 35 lb plate is 15.88 kg. Neither matches the metric bumper plates beside them.
  • Airline baggage: the 50 lb limit is 22.68 kg. European scales set to 23 kg will let through a bag the airline rejects.
  • Postage: carriers bill by whole ounces below a pound, so 12.3 oz bills as 13 oz. Always round up when estimating.
  • Medication dosed per pound of body weight, common in US veterinary medicine, where the conversion error goes straight into the dose.

Worked Examples

Including the mixed weights people actually type

A newborn at 7 lb 4 oz

  1. Whole pounds: 7 × 453.59237 = 3175.15 g
  2. The ounces separately: 4 × 28.349523 = 113.40 g
  3. Add them: 3175.15 + 113.40 = 3288.55 g

7 lb 4 oz = 3289 g = 3.29 kg

Converting body weight in stones

  1. 11 st 6 lb means 11 × 14 + 6 = 160 lb
  2. 160 × 453.59237 = 72 574.8 g
  3. Divide by 1000 for the figure a doctor would use: 72.57 kg

11 st 6 lb = 72.6 kg

Frequently Asked Questions

How many grams are in 2 pounds?

907.18 g, or 0.907 kg. It is worth remembering because 2000 lb — a US short ton — is 907.18 kg, the same digits shifted by three places.

How do I convert 7 lb 4 oz to grams?

Convert the two parts separately and add: 7 × 453.59237 = 3175.15 g, and 4 × 28.349523 = 113.40 g, giving 3288.55 g. Do not type 7.4 lb — that is 7 pounds and 6.4 ounces, a different weight.

Why do American recipes use cups instead of pounds?

Because US home baking standardised on volume measures in the early twentieth century, when scales were less common in kitchens. It is why a US recipe rarely gives you a pound figure to convert: you get cups, and a cup of flour is about 120 g while a cup of sugar is about 200 g.

Is a pound the same in the US and the UK?

Yes, since the 1959 agreement fixed both at exactly 453.59237 g. What differs is the ton: a US short ton is 2000 lb, a UK long ton is 2240 lb.

How many grams is a stone?

6350.29 g, since a stone is 14 pounds. Britain and Ireland still use it for body weight, so 12 stone is 76.2 kg.

What is a quarter pound in grams?

113.4 g. That is the raw weight of a quarter pounder patty; it loses roughly a quarter of its mass to water and fat while cooking, ending up nearer 85 g.

Should I use 453.6 or 454 grams per pound?

For cooking, shipping estimates and everyday use, 454 is fine — the error is nine parts per million. Use the full 453.59237 when a legal weight, a dosage or a certification depends on it.

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