Everyday units

Mass converter

Convert grams, kilograms, pounds and ounces.

Popular mass conversions

Convert kilograms to grams with a fixed kg-to-g calculator, a worked example and guidance on decimal weights.

Convert grams to kilograms, including quantities below one kilogram, using the exact 1000-gram relationship.

Convert kilograms to avoirdupois pounds using the international pound definition, with a clear kg-to-lb example.

Convert decimal pounds to kilograms with the exact international pound factor and tips for pounds-and-ounces inputs.

From everyday arithmetic to powers, roots and trigonometry.

Find a percentage of any number in one simple step.

See the price after a percentage discount.