Convert Pound (lb) to Gram (g)
Category: Mass
1 lb = 453.59237 g
High-precision rounding: 6 decimals
How to convert pound (lb) to gram (g)
Mass quantifies the amount of matter. The kilogram is defined by Planck’s constant, which anchors mass to fundamental physics. In practice, grams and pounds dominate everyday use—from recipes and parcels to body weight—while tonnes and long tons appear in logistics and industry.
This converter calculates Pound (lb) to Gram (g) values by using the correct conversion rule for the Mass category. For linear units, standardized factors are used. For temperature, the calculator applies the proper formula with offsets.
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Quick conversion table
Handy values for Pound (lb) to Gram (g). Click a value to open that exact result.
Conversion formula
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Confusing mass (lb) with force (lbf) in engineering contexts.
- Mixing metric tonnes (t) with short/long tons.
Unit facts
- Pound (lb): The (avoirdupois) pound is exactly 0.45359237 kg (1959). Still used for body weight and groceries in US/UK.
- Gram (g): A gram is 1/1000 of a kilogram; ubiquitous in cooking and chemistry.
About Pound (lb)
Pound (lb)
Imperial/US unit of mass; exactly 0.45359237 kg. Popular for body weight, groceries, and engineering specs in US industry.
History: Standardized in 1959; traces back to the Roman libra. Different historical pounds existed (avoirdupois, troy) before modern unification.
About Gram (g)
Gram (g)
Equals 1/1000 kg. Standard for recipes, nutrition labels, and lab reagents. Converts cleanly across the metric ladder without rounding traps.
History: Introduced with the original metric system after the French Revolution. Its use expanded with mass manufacturing and standardized packaging.