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Convert between metric and imperial weight units instantly.
⚖️ Covers both everyday weight (kg, lb, oz, stones) and precise mass units (carats for gemstones, grains for ammunition/medicine). Mass and weight share this one converter.
Weight (or more precisely, mass) is measured in two main systems worldwide. The metric system (milligrams, grams, kilograms, metric tons) is used in nearly every country and is based on powers of 10. The imperial system (ounces, pounds, stones) is used primarily in the United States and, for body weight, in the UK and Ireland.
Technically, mass (kilograms) measures how much matter something contains, while weight (newtons, or pounds-force) measures the gravitational force on that mass. Your mass is the same on Earth and the Moon; your weight is about 1/6 on the Moon. In everyday use, we treat them as interchangeable, and this converter does the same.
The Weight Converter converts weight converterfrom one unit to another using the exact internationally defined conversion factors. Type a value, choose your source and target units, and the converted result is shown instantly — no waiting, no page reload.
Manual conversion is error-prone because it means memorizing ratios (how many feet in a meter, how many pints in a liter). This tool removes that friction: the conversion factor is built in, and the math is done to full precision with no rounding until the final displayed number.
Common uses: people reach for this tool when they need to look up a kg to lbs converter for body weight, pounds to kg converter, convert kilograms to pounds, or kg lbs oz grams converter.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
The Weight Converter is based on the following formula:
lb = kg × 2.2046226218 oz = lb × 16 kg = lb × 0.45359237
Variables: kg = mass in kilograms lb = mass in pounds (1 lb = 0.45359237 kg) oz = mass in ounces (1 lb = 16 oz)
Kilograms to pounds and ounces. 1 kg = 2.20462 lb, 1 lb = 16 oz, 1 g = 0.035274 oz. Conversions use the international avoirdupois pound, the exact standard since 1959.
Worked example: Convert 70 kg to pounds: lb = 70 × 2.2046226218 = 154.32 lb Split into pounds and ounces: 0.32 lb × 16 = 5.12 oz, so 70 kg ≈ 154 lb 5.12 oz Check the reverse: 154.32 lb × 0.45359237 = 70.00 kg
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