Category: Imperial system

The international avoirdupois pound was officially defined as exactly 453.59237 grams by international agreement in 1959. This standardization resolved historical inconsistencies between various definitions of the pound and is the foundation for all modern pound-to-gram conversions.

According to the official avoirdupois system, one pound is exactly 453.59237 grams. This means that the common question, "Is 500g the same as 1 lb?" can be definitively answered with a resounding "no". While 500g is often a convenient rounding for half a kilogram in some contexts, it's not a precise equivalence for one pound.