Unit converter

Weight Converter

Use this free weight converter to convert kilograms, pounds, grams, ounces, stones, tons, carats, and troy ounces with stones-pounds and lb-oz readouts.

Convert weight or mass

Enter any non-negative mass value and select your source and target units.

Enter zero or any positive weight.
Adjust decimal rounding for results.

Quick pounds & ounces (or stones & pounds) input

Convert shipping parcels (lb + oz) or UK body weight (st + lb) into any unit.

Converted weight

70 Kilograms equals

154.323584 lb
Pounds & ounces (lb oz)154 lb 5.18 oz
Stones & pounds (st lb)11 st 0.32 lb
Direct conversion factor1 kg = 2.204623 lb
SI base equivalent (kg)70 kg

All weight & mass equivalents

    Exact international definitions: 1 avoirdupois pound = 0.45359237 kg, 1 ounce = 28.349523125 g, 1 troy ounce = 31.1034768 g.

    How weight and mass conversions work

    In everyday commerce, cooking, fitness, and shipping, "weight" refers to mass measured against exact international standards anchored to the kilogram (kg):

    • Metric units: 1 metric ton (tonne) = 1,000 kg; 1 kilogram = 1,000 grams (g); 1 gram = 1,000 milligrams (mg) = 1,000,000 micrograms (µg).
    • Imperial & US avoirdupois units: 1 pound (lb) = 0.45359237 kg exactly; 1 pound = 16 ounces (oz); 1 stone (st) = 14 pounds (6.35029318 kg).
    • Tons compared: A metric tonne is 1,000 kg (~2,204.62 lb), a US short ton is 2,000 lb (907.185 kg), and a UK imperial long ton is 2,240 lb (1,016.047 kg).
    • Jewelry & precious metals: Diamonds and gemstones use metric carats (1 ct = 0.2 g), while gold, silver, and platinum bullion are quoted in troy ounces (1 oz t = 31.1034768 g).

    Common pitfalls to avoid

    • Standard ounce vs. troy ounce: A troy ounce (31.103 g) is nearly 10% heavier than a kitchen/postal avoirdupois ounce (28.350 g). Always choose Troy ounce (oz t) when weighing gold or silver bullion.
    • Fluid ounces vs. weight ounces: Fluid ounces (fl oz) measure volume, whereas ounces (oz) measure mass. One fluid ounce of honey or oil does not weigh one avoirdupois ounce.
    • Decimal pounds on shipping scales: A scale reading of 4.5 lb equals 4 lb 8 oz (since 0.5 × 16 = 8 oz), not 4 lb 5 oz. Check the Pounds & ounces tile for parcel labels.

    Frequently asked questions

    How many pounds are in a kilogram?

    One kilogram equals approximately 2.20462262 pounds, because 1 pound is defined as exactly 0.45359237 kilograms.

    How many grams are in an ounce?

    One standard (avoirdupois) ounce equals 28.349523125 grams. For precious metals, one troy ounce equals 31.1034768 grams.

    How do I convert kilograms to stones and pounds?

    Enter your weight in kilograms and read the "Stones & pounds (st lb)" summary tile directly. Because 1 stone equals 14 pounds (6.35029 kg), 70 kg equals 11 stone 0.32 pounds.

    What is the difference between a metric ton, US ton, and UK ton?

    A metric ton (tonne) is 1,000 kg (2,204.62 lb). A US short ton is 2,000 lb (907.18 kg). A UK long ton is 2,240 lb (1,016.05 kg).

    How many carats are in a gram?

    There are exactly 5 metric carats in 1 gram (1 carat = 200 milligrams = 0.2 grams).

    Why are gold and silver weighed in troy ounces?

    Global bullion markets retained the historic troy system to maintain continuity in coin and bar standards. Always verify whether a quote uses oz t (31.1035 g) or standard oz (28.3495 g).

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