How do I convert pounds to grams?

Multiply the number of pounds by 453.592 to get grams.

Pounds to Grams

Convert pounds to grams instantly. Free, fast, no signup.

By AbraCalc Editorial Team · Reviewed by AbraCalc Methodology Review · Last reviewed: 2026-06-25 2 sources

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APA

AbraCalc. (2026). Pounds to Grams [Online calculator]. Retrieved from https://abracalc.com/converter/pounds-to-grams/

BibTeX

@misc{abracalc-pounds-to-grams, author = {AbraCalc}, title = {Pounds to Grams}, year = {2026}, howpublished = {\url{https://abracalc.com/converter/pounds-to-grams/}} }

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How to use this tool

Enter pounds in the fields above.
Results update instantly as you type — or click Calculate.
Read your grams and the full breakdown beneath it.

Convert pounds to grams instantly. Free, fast, no signup.

Formula

Grams = Pounds × 453.59237

This exact factor is defined by international agreement: 1 pound (avoirdupois) = 453.59237 grams exactly.

How it works

Multiply the pound value by 453.59237 to get grams. This factor is an exact definition set by international standards bodies, so no rounding is introduced by the conversion itself — only by how many decimal places you choose to keep in your result.

Common mistake: Confusing avoirdupois pounds (used for everyday weight) with troy pounds (used for precious metals). A troy pound equals 373.24 grams, not 453.59 — using the wrong pound type can produce a significant error.

Worked example

Convert 1 pound to grams

Start with 1 pound.
Apply the conversion factor: 1 × 453.59237.
Result: 453.59237 grams.

1 pound = 453.59237 grams

Common mistakes to avoid

Using 450 g per pound instead of the exact 453.592, understating the gram result by about 0.8% -- over a 5 lb bag of flour that is 18 g off.
Confusing avoirdupois pounds with troy pounds (373.2 g each) -- the 453.592 factor applies only to the common avoirdupois pound.
Multiplying by 0.002205 instead of 453.592 -- that converts grams to pounds.

Key terms

Pound (avoirdupois): The standard pound used in everyday commerce in the US and UK, equal to exactly 453.59237 grams. Distinct from the troy pound used for precious metals.
Gram: The base unit of mass in the metric system, defined as one-thousandth of a kilogram.
Avoirdupois system: The common weight system used in the United States and historically in Britain, based on a pound of 16 ounces.
Troy pound: A unit of mass for precious metals equal to 12 troy ounces or approximately 373.24 grams — do not confuse with the avoirdupois pound.

Frequently asked questions

How do I convert pounds to grams?: Multiply the number of pounds by 453.592 to get grams.