Convert Pounds to Grams

The Conversion Formula

To convert pounds to grams, multiply the value by the conversion factor: 1 lb = 453.59 g. For a worked example, suppose you need to convert 25 lb to grams: 25 × 453.59 = 11339.8 g. To convert in the opposite direction, divide by 453.59, or equivalently multiply by 0.00220462.

About pounds

The pound (lb) traces its roots to the Roman 'libra', which is why its abbreviation is 'lb'. The modern 'avoirdupois pound' was standardized in 1959 to be exactly 0.45359237 kilograms, creating a bridge between the imperial and metric worlds. While the UK has officially adopted metric, the pound remains the cultural standard for body weight there (often via 'stones') and is the official unit of weight in the United States. pounds are commonly used in Body weight (US), Grocery produce (US), Baby birth weight, and Dumbbells and kettlebells (US), Boxing weight classes.

A loaf of sandwich bread weighs about 1 pound.

About grams

The gram was the foundational unit of the original metric system in 18th-century France. Defined as the absolute weight of a volume of pure water equal to the cube of the hundredth part of a meter (1 cm³), it brought logic to a chaotic world of measurements. It remains the standard for cooking, chemistry, and postal services. The gram is the base for the CGS system, which preceded the modern SI system. grams are commonly used in Cooking and baking ingredients, Nutritional labels (sugar, protein), Gold and jewelry, and Letter mail weights, Laboratory chemistry.

A standard paperclip weighs approximately 1 gram.

When Would You Convert pounds to grams?

Converting between pounds and grams is one of the most common weight conversions. You might need this conversion when working with international specifications, following instructions written for a different measurement system, or comparing values across different standards. Having the conversion factor (1 lb = 453.59 g) memorized or bookmarked can save time in professional and everyday contexts alike.