A gram is one thousandth of a kilogram.
Grams to Pounds Converter — g to lb
Convert Gram (g) to Pound (lb) using the exact conversion factor (1 gram = 0.0022046226 pound). See the formula, worked examples, conversion table, unit comparison, history, and common uses.
Grams to Pounds converter
Converter
Mass/Weight Converter
Convert SI mass, imperial weight, jewelry, atomic, and astronomy mass units.
Context values
Some unit families need one extra value for a physically accurate result.
An avoirdupois pound is exactly 0.45359237 kilograms.
Result = input x 0.001 / 0.45359237.
Mass uses the kilogram as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Grams to Pounds
Weight conversions between Gram and Pound come up constantly in everyday commerce, shipping, and cooking, since US packaging is usually labeled in pounds while most of the rest of the world uses kilograms. Gram is typically associated with standard small-mass unit worldwide, while Pound is typically associated with united States (primary mass/weight unit).
Formula
pounds = grams × 0.00220462262185
This factor comes from each unit's defined relationship to the category's base unit: 1 gram equals 0.001 base units, and 1 pound equals 0.45359237 base units, so dividing one by the other gives the direct gram-to-pound factor of 0.00220462262185.
Simple example
1 g × 0.002204622622 = 0.0022046226 lb
1 gram = 0.0022046226 pounds.
Real-world example
50 g × 0.002204622622 = 0.1102311311 lb
50 grams = 0.1102311311 pounds.
Conversion table
| Gram (g) | Pound (lb) |
|---|---|
| 1 g | 0.0022046226 lb |
| 5 g | 0.0110231131 lb |
| 10 g | 0.0220462262 lb |
| 25 g | 0.0551155656 lb |
| 50 g | 0.1102311311 lb |
| 100 g | 0.2204622622 lb |
Reverse conversion: Pound to Gram
0.0022046226 lb × 453.59237 = 0.9999999901 g
0.0022046226 pounds = 0.9999999901 grams.
grams = pounds × 453.59237
For a page dedicated to this direction, see Pound to Gram.
Gram vs. Pound
| Aspect | Gram | Pound |
|---|---|---|
| Family | SI derived (metric prefix) unit | US/imperial customary unit |
| Typical use | Cooking and nutrition labeling worldwide (including in the US, alongside ounces) | Body weight and food retail packaging in the United States |
| Where it's used | Standard small-mass unit worldwide | United States (primary mass/weight unit) |
Understanding the Gram
Gram (g) measures mass. A gram is one-thousandth of a kilogram, the SI base unit of mass. It is classified as a SI derived (metric prefix) unit.
Where it's used: Standard small-mass unit worldwide
Uses of the Gram today
- Cooking and nutrition labeling worldwide (including in the US, alongside ounces)
- Precious metal and small-item weighing
- Scientific and laboratory measurement
History of the Gram
Originally defined in 1795 as the mass of one cubic centimeter of water, the gram follows directly from the kilogram (1/1000 of it) under the modern SI system, inheriting the kilogram's various historical and current definitions.
Historical origin. Gram was not the invention of a single named person; it developed through the process described above.
Understanding the Pound
Pound (lb) measures mass. The avoirdupois pound is legally defined as exactly 0.45359237 kilograms, fixed by international treaty in 1959. It is classified as a US/imperial customary unit.
Where it's used: United States (primary mass/weight unit) United Kingdom (informal and some retail use) Various Caribbean and Pacific territories with historical UK/US ties
Pound-mass vs. pound-force. This page converts pound-mass (lbm), a unit of mass. Pound-force (lbf) is a separate unit measuring the force gravity exerts on one pound-mass, used in engineering contexts like pounds per square inch.
Uses of the Pound today
- Body weight and food retail packaging in the United States
- Postal, parcel, and freight weight in US shipping and logistics
- Pound-force (lbf) and its derivatives (psi, foot-pounds) in US engineering and aerospace
History of the Pound
Unlike the kilogram's single documented birth in revolutionary France, the pound's history is a long, layered narrowing of competing regional standards. The avoirdupois pound — ancestor of today's standard — emerged among London merchants in the early 14th century (recorded use around 1303), used for weighing wool and other bulk goods under the system merchants called 'avoir de pois,' Old French for 'goods of weight.' Its 16-ounce structure suited large-scale trade better than the 12-ounce troy pound used for precious metals.
Wool merchants used a related 'wool pound' of about 6,992 grains — close enough to 7,000 that Elizabeth I's government formally fixed the avoirdupois pound at exactly 7,000 grains in 1588, the value still used today. Britain and the US then refined their physical standards separately over the following centuries, leaving small discrepancies between them.
Those discrepancies were resolved on 1 July 1959, when the US, UK, Canada, Australia, New Zealand, and South Africa signed the International Yard and Pound Agreement, fixing the pound at exactly 0.45359237 kg and the yard at exactly 0.9144 m. The US National Bureau of Standards (now NIST) adopted the value immediately; the UK followed via its Weights and Measures Act 1963 — the value used by virtually every country today.
Historical origin. Pound was not the invention of a single named person; it developed through the process described above.
Gram — sources
- BIPM — The kilogram (SI base unit) — Basis for the gram as 1/1000 of the kilogram.
Pound — sources
- NIST — International yard and pound, Federal Register notice (1959) — Official 1959 refinement of the yard and pound values adopted by the US National Bureau of Standards.
- Encyclopaedia Britannica — 'Pound (unit of weight)' — History of the Tower, troy, and avoirdupois pounds and their standardization in England.
- UK Weights and Measures Act 1963, s.1(1) — Statutory UK definition of the pound as exactly 0.45359237 kilogram.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds are in 1 gram?
1 gram equals 0.0022046226 pounds, using the exact defined conversion factor rather than an estimate.
How do I convert gram to pound?
Multiply the gram value by 0.002204622622. The converter above does this instantly to whatever precision you set.
How do I convert pound back to gram?
Use the reverse factor: 1 pound equals 453.59237 grams. You can also use the swap control in the converter above to flip the direction instantly.
What is a gram?
Gram (g) measures mass. A gram is one-thousandth of a kilogram, the SI base unit of mass. It is classified as a SI derived (metric prefix) unit.
What is a pound?
Pound (lb) measures mass. The avoirdupois pound is legally defined as exactly 0.45359237 kilograms, fixed by international treaty in 1959. It is classified as a US/imperial customary unit.
Is the gram to pound conversion exact?
Yes. The avoirdupois pound is legally defined as exactly 0.45359237 kilograms, fixed by international treaty in 1959. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.
What is the difference between pound-mass vs. pound-force?
This page converts pound-mass (lbm), a unit of mass. Pound-force (lbf) is a separate unit measuring the force gravity exerts on one pound-mass, used in engineering contexts like pounds per square inch.
Where is the gram still used today?
Standard small-mass unit worldwide