kg to lbs Converter

How to convert kg to lbs

One pound is defined as exactly 0.45359237 kilograms, which gives a clean conversion in either direction:

• pounds = kg × 2.20462
• To go the other way: kg = pounds × 0.453592

For example, 70 kg × 2.20462 = 154.32 lb, and a 23 kg checked bag is about 50.7 lb. Type a value into either box above and the paired field, the 0–150 kg progress bar and the chart update instantly — clear a box and the other clears too.

kg to lbs conversion chart

These are the kilogram values people convert most often — handy for body weight, gym plates, luggage allowances and shipping. The pound column is rounded to two decimals:

Why 2.20462 is the conversion factor

The pound is defined internationally as exactly 0.45359237 kilograms, and 2.20462 is simply its reciprocal — the number of pounds in one kilogram. For a fast mental estimate, double the kilograms and add about 10% (70 kg → roughly 140 + 14 = 154 lb), then use the exact figure when it matters.

Body weight across the two systems

Body weight is where most people meet this conversion. Medical records almost everywhere use kilograms, including in the United States — drug dosing is calculated per kilogram, so a hospital will weigh you in kg regardless of what your bathroom scale says. Gyms, home scales and everyday conversation in the US stick to pounds, which is why the same person is "70 kg" at a clinic and "154 lb" at the gym.

The UK adds a third layer: stones. One stone is 14 pounds, so 70 kg is 154 lb, which is 11 stone 0 lb. To go from kilograms to stones and pounds, convert to pounds first, then divide by 14 — the whole number is the stones and the remainder is the pounds. 80 kg is 176.4 lb, or 12 stone 8.4 lb.

Luggage, freight and shipping

Airline baggage allowances are one of the few places where getting this wrong costs money directly. Most international carriers set limits in kilograms — commonly 23 kg for a checked bag in economy, which is 50.7 lb, and 7–10 kg for carry-on. US domestic airlines usually quote 50 lb, which is 22.7 kg. Those two limits look different but are effectively the same allowance expressed in two units, and a bag packed to one will pass the other.

Shipping and customs paperwork is nearly always metric, even for domestic US freight, so courier forms will ask for kilograms. If your scale reads pounds, multiply by 0.453592 — and round up rather than down, since carriers bill by weight bracket and an understated figure tends to get corrected at your expense.

Common conversions worth memorising

A handful of anchor points make it easy to sanity-check a number before reaching for the exact figure. 1 kg is about 2.2 lb, so 10 kg is roughly 22 lb and 100 kg is roughly 220 lb. Going the other way, 1 lb is a little under half a kilogram, so halving pounds gets you close to kilograms — 150 lb halves to 75, against a true figure of 68 kg, which is near enough to catch an order-of-magnitude mistake. Gym plates are a useful everyday reference too: the standard Olympic plate is 20 kg (44 lb), and a US 45 lb plate is 20.4 kg — close enough that the two are often used interchangeably, though a full barbell loaded either way differs by around a pound.

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