Weight Converter
Convert between kilograms, pounds, grams, ounces, and stones.
Unit
Weight Converter
Generated on April 24, 2026
?What is the Weight Converter?
A weight converter switches effortlessly between the metric units of mass (kilograms, grams) and the imperial/US units (pounds, ounces, and the British stone). Whether you are following an American recipe from a Pakistani kitchen, measuring body weight for a medical form, shipping a parcel internationally, or comparing gym equipment specifications, accurate mass conversion matters. This tool runs entirely in your browser, supports decimals, and handles both very small amounts (grams for spices and jewelry) and large amounts (tonnes of construction material or freight).
The Formula
All supported units store a fixed conversion factor to kilograms (the SI base unit for mass). To convert, the tool multiplies your input by its source factor to reach kilograms, then divides by the target factor to produce the answer. This two-step 'base conversion' pattern works for any pair of linear units and avoids rounding error that creeps in when direct factors are chained for every pair. The pound-to-kilogram conversion factor 0.453592 is an internationally agreed definition, not a derived value — it has been exact since 1959.
Practical Examples
A 250-gram bag of flour in a US recipe converts to 8.82 ounces — handy when your measuring cup only shows imperial units.
A 150-pound adult weighs about 68.04 kg — useful for translating a US driving license or insurance form into metric health records.
1 stone equals 14 pounds or 6.35 kg — British fitness apps often ask for body weight in stones even when you use kilograms day-to-day.
A 2 kg courier parcel becomes 4.41 lb on a US shipping label, helping you confirm the carrier's billed weight bracket.
Newborn weight 3,400 g equals 7 lb 8 oz — useful for expat parents filling out birth certificates in different countries.
A 500 g block of butter is 17.64 ounces, or roughly 1.1 pounds — a reassuring conversion when following a US-based baking recipe.