Kilograms to Pounds Converter
Convert kg to lb instantly with the exact factor — free, no sign-up.
Type a weight in kilograms and get the exact pound equivalent instantly. The converter multiplies by the internationally defined factor of 2.2046226218, shows the math, and lets you swap direction with one tap.
How it's calculated
pounds = kilograms × 2.2046226218. The factor is exact: the international pound is legally defined as 0.45359237 kg, so 1 ÷ 0.45359237 = 2.2046226218.
How the kilogram-to-pound conversion works
The kilogram is the SI base unit of mass, defined by the Planck constant since 2019, while the pound is the imperial unit legally defined as exactly 0.45359237 kilograms. That exact definition is why converting is a single multiplication: pounds = kilograms × 2.2046226218. The factor 2.2046226218 is simply 1 ÷ 0.45359237, so every result on this page is exact to the precision of the international definition, not an approximation.
Because the relationship is linear, you can scale freely: half the kilograms means half the pounds, and doubling works the same way. There are no offsets or special cases like temperature scales have, which is why a kilogram-to-pound converter only needs one factor and never drifts.
Common kilogram to pound reference points
Memorizing a few anchors makes everyday estimates instant. One kilogram is about 2.2 pounds, so 5 kg is roughly 11.02 lb, 10 kg is 22.05 lb, and 20 kg is 44.09 lb — handy for luggage limits and parcel weights.
Body-weight landmarks help too: 50 kg converts to 110.23 lb, 60 kg to 132.28 lb, 70 kg to 154.32 lb, 80 kg to 176.37 lb, 90 kg to 198.42 lb, and 100 kg to 220.46 lb. In the gym, a 20 kg Olympic plate is 44.09 lb, which is why plates marked 45 lb are near-equivalents rather than exact matches.
Where you'll use kilograms to pounds
Travel is the most common trigger: airlines quote baggage allowances in kilograms on international tickets and pounds on US domestic ones, so a 23 kg checked-bag limit is 50.71 lb. Recipe sites flip between grams and ounces or pounds depending on the author's country, and fitness programs written in the US prescribe weights in pounds while most of the world trains in kilograms.
Shipping calculators, medical dosage charts, and product specs all mix the two systems. Whenever precision matters — medication, freight billing, engineering — use the full factor rather than the 2.2 shortcut, which can drift by nearly half a pound on a 100 kg load.
Frequently asked questions
What is the exact kg to lb conversion factor?
One kilogram equals exactly 2.2046226218487757 pounds, because the international pound is defined as exactly 0.45359237 kilograms. For everyday use 2.20462 is plenty; the converter above uses the full-precision factor.
How do I convert kg to lbs in my head?
Multiply by 2.2 for a quick estimate — 70 kg is about 154 lb. For better accuracy, add roughly 0.2% of your estimate on top: 154 + 0.3 ≈ 154.3 lb, very close to the exact 154.32 lb.
Why do the US and UK still use pounds instead of kilograms?
The pound predates the metric system and stayed in everyday use in the United States, while the UK uses a mix (stones and pounds for body weight). Science, medicine, and most industries worldwide use kilograms; this converter bridges the two systems.
Is 1 kg the same as 2.2 lbs?
Approximately, not exactly. 2.2 is a rounded shortcut; the exact value is 2.2046226218 lb. The shortcut is fine for luggage and recipes but is off by about 0.46 lb on a 100 kg measurement.