How many grams are in a pound?

There are exactly 453.59237 grams in one avoirdupois pound. This is the internationally defined exact value. For most everyday purposes, 453.6 g per pound is accurate enough.

How do I convert pounds to grams?

Multiply the weight in pounds by 453.59237 to get the weight in grams. For example, 2.5 lb x 453.59237 = 1,133.98 g. For a quick mental estimate, multiply by 454.

What is the difference between a pound and a gram?

A gram is a metric unit of mass equal to one thousandth of a kilogram. A pound is an imperial unit equal to 453.59237 grams. Grams are used throughout the metric world (including New Zealand) for everyday weights such as food and postage, while pounds are common in the United States and still used informally in NZ for body weight and produce.

Pounds to Grams Converter

Enter a weight in pounds (lbs) to convert it to grams (g) and kilograms (kg) instantly, using the exact avoirdupois conversion of 1 lb = 453.59237 g. Choose your decimal precision and view the conversion table below.

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Exact conversion International avoirdupois pound. 1 lb = 453.59237 g (exact, by international agreement since 1959).

Enter Weight in Pounds

Weight (pounds)

Decimal places in result

Conversion Reference

Quick reference

Select a common value to fill the input, or type your own weight above.

Conversion Result

Pounds (input)

Grams
453.59
g

Kilograms

0.4536

Worked Example: Default Input (1 lb)

Using the default input of 1 pound:

grams = pounds x 453.59237

grams = 1 x 453.59237 = 453.59 g

kilograms = 453.59237 / 1000 = 0.4536 kg

This matches the result shown in the calculator above.

Common Pounds to Grams Conversions

Pounds (lb)	Grams (g)	Kilograms (kg)	Ounces (for reference)

How to Convert Pounds to Grams

The conversion from pounds to grams uses one fixed factor: 1 pound = 453.59237 grams. This value was set by international agreement in 1959 (the International Yard and Pound Agreement) and is exact, not approximate. To convert any number of pounds to grams, simply multiply by 453.59237.

For a quick mental estimate, round to 454 grams per pound. To convert to kilograms, divide the gram result by 1,000.

The Formula

To find	Formula
Grams from pounds	g = lb x 453.59237
Kilograms from pounds	kg = lb x 0.45359237
Pounds from grams (reverse)	lb = g / 453.59237

Pounds vs Grams: Which System Is Used Where?

New Zealand uses the metric system, so grams (g) and kilograms (kg) are the standard units for everyday weights, including food labels, postage, and cooking. Pounds are part of the imperial system, still used commonly in the United States and, informally, in some Commonwealth countries for body weight and produce.

You are most likely to need this conversion when following a recipe from a US source, weighing a parcel for international shipping, or buying ingredients from a market that prices by the pound. New Zealand supermarkets and nutrition labels always use metric weights.

Common Uses

Cooking and baking: US recipes often list ingredients in pounds or ounces. Convert to grams for accurate kitchen scales.
Postage and freight: Some international carriers quote weight limits in pounds, especially to and from the United States.
Gym and fitness: Weight plates and dumbbells sold in the US are marked in pounds. 1 lb plate = 453.6 g.
Online shopping: Product weights on US websites are often in pounds. Convert to estimate postage costs to NZ.
Fishing: Fish weights are sometimes quoted in pounds, particularly in international competitions.

Related Calculators

Essential Calculators: the full converter hub.
Grams to Pounds Converter: the reverse conversion.
Kilograms to Pounds Converter: convert kilograms to pounds.
Grams to Ounces Calculator: convert grams to ounces.
Kilograms to Ounces Converter: convert kg to oz.

Sources and method: International Bureau of Weights and Measures (BIPM). International Yard and Pound Agreement (1959) -- defines 1 avoirdupois pound as exactly 453.59237 grams. NIST Handbook 44, Appendix C (Unit Conversion Tables).

This converter uses the exact international avoirdupois pound definition. The troy pound (used for precious metals) is different: 1 troy pound = 373.24172 grams. The conversion above applies to the everyday (avoirdupois) pound used for food, body weight, and general merchandise.

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