Weight & Mass Converter
Convert between any weight or mass unit instantly — metric, imperial, US customary, or compound formats like stones and pounds.
1 Kilograms (kg) =
2.2
Converted via 1000 g per kg and 453.59237 g per lb. Avoirdupois factors are exact under the 1959 International Yard and Pound Agreement.
How to use this calculator
Enter a value, choose your starting unit from the "From" dropdown, then pick the unit you want in the "To" dropdown. The result updates instantly as you type.
How the calculation works
Every unit is converted via a single intermediate value in grams. Multiply your input by the "grams per unit" factor for the source unit, then divide by the factor for the target unit. Avoirdupois factors are exact as defined by the 1959 International Yard and Pound Agreement: 1 lb = 0.45359237 kg.
Worked example
70 kg → pounds: 70 × 1000 g/kg = 70 000 g ÷ 453.59237 g/lb ≈ 154.324 lb.
Frequently asked questions
How many pounds are in a kilogram?
One kilogram is approximately 2.2046226 pounds. The exact relationship is 1 lb = 0.45359237 kg, fixed by the 1959 International Yard and Pound Agreement.
How do I convert kilograms to stone and pounds?
Select "kg" as the "From" unit, enter your value, then pick "Stone + pounds" from the "To" dropdown. A stone is 14 lb (about 6.35 kg), so 75 kg becomes 11 st 11.35 lb.
What is the difference between a short ton, long ton, and metric tonne?
A US short ton is 2000 lb (≈ 907.18 kg). A UK long ton is 2240 lb (≈ 1016.05 kg). A metric tonne is exactly 1000 kg (≈ 2204.62 lb). All three are sometimes just called a "ton", so always check which one you mean.
Are ounces always 28.35 grams?
For weight (avoirdupois ounces), yes — exactly 28.349523125 g. The troy ounce used for precious metals is different (31.1034768 g) and is not included here. This converter uses avoirdupois throughout.
How accurate are the results?
Conversions are computed in full floating-point precision using the exact NIST factors. The display rounds to a sensible number of decimal places for readability.