Kilograms or pounds? Grams or ounces? This weight converter handles all six common mass units with exact international conversion factors. Whether you're reading a recipe, checking luggage limits, or comparing gym plates, enter a value and get an accurate conversion plus the formula it used.
Converted value
2.2046
Every conversion goes through kilograms, using exact factors:
value in kg = value × (kg per unit) → result = kg ÷ (kg per unit)
Both were fixed by the 1959 international yard and pound agreement — exact by definition. Metric steps are decimal (1 tonne = 1,000 kg, 1 kg = 1,000 g).
Convert 1 kilogram to pounds:
And 500 grams to ounces: 0.5 ÷ 0.028349523125 = 17.637 oz.
Converted value is shown to four decimal places. The conversion used line gives the exact per-unit factor for reuse elsewhere.
Note on everyday vs technical use: kitchen scales and luggage limits don't need four decimals — round to one or two. Shipping and laboratory work might want the full factor, which is exact.
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Content last reviewed on 2026-10-06.