Pounds to Kilograms Converter
Enter a weight in pounds to convert it to kilograms. The calculator also shows larger results as kilograms and remaining grams.
This calculator uses the international avoirdupois pound, the standard pound used for body weight, luggage, parcels, product weights, and other everyday measurements.
Enter zero or any positive weight. A decimal such as 5.5 lb means 5 lb 8 oz, while 5.8 lb does not mean 5 lb 8 oz.
Kilograms + remaining grams
68 kg 38.8555 g
Automatic: up to 8 decimals. Results are rounded for display.
Start with a common example
Choose a sample pound value, then replace it with the weight from your scale, booking, parcel label, or product information. The examples are for quick reference only. Baggage limits can vary by airline, route, fare, and ticket type.
Have pounds and ounces?
Enter the whole pounds and remaining ounces separately. For example, a weight of 5 lb 8 oz can be entered directly and converted to kilograms. The ounces field should be less than 16 because 16 oz equals 1 lb.
Choose the right converter
Use the converter that matches the unit shown on your scale, label, recipe, or booking.
- Convert kilograms to pounds when a metric weight needs to be shown in pounds.
- Convert pounds to grams when you need a gram result for recipes, food packages, or smaller parcels.
- Convert ounces to grams when the weight is given only in ounces. If the label shows both pounds and ounces, use the separate fields above.
- Explore other weight conversions when you need stones, tonnes, milligrams, short tons, troy ounces, or another weight unit.
Check pound-based luggage against a kilogram allowance
A bag weighing 50 lb is exactly 22.6796185 kg, so it is slightly below a 23 kg limit. The difference is about 0.32 kg. Similarly, 44 lb ≈ 19.9581 kg, which is only about 42 g below 20 kg.
Always check the number and unit shown on your booking. If the allowance is 23 kg, compare the converted value directly with 23 kg rather than rounding it first. A display of 22.7 kg is easier to read, but the unrounded value shows how close the bag is to the limit.
This calculator compares weight values only. Airline baggage rules can vary by carrier, route, fare, bag type, and passenger status. Your scale may also have a small measurement tolerance.
Convert a body-weight reading without adding false precision
A weight of 150 lb converts to 68.0388555 kg. For most body-weight logs, 68.0 kg is a more practical value to record.
Keep the original 150 lb reading with the converted value when you want an easy reference back to the measurement from the scale.
Convert the change before rounding
A change of 5 lb equals about 2.268 kg. For example, if your weight changes from 150 lb to 145 lb, convert the 5 lb difference directly or use the unrounded kilogram values. If you subtract two kilogram results that were rounded separately, the final change may be slightly different.
Enter pounds and ounces as a mixed weight
A weight written as 5 lb 8 oz is not the same as 5.8 lb. Since 16 oz equals 1 lb, 8 oz is half a pound. That means:
5 lb 8 oz = 5.5 lb
The pounds-and-ounces fields above handle this conversion automatically. For example, 5 lb 8 oz ≈ 2.494758 kg, or about 2 kg 495 g.
Use decimal pounds when a form has one lb field, such as 5.5 lb. Use the separate pounds and ounces fields when copying a weight written as 5 lb 8 oz. Then use either the decimal kilogram result or the kilograms-and-grams format, depending on what you need.
Common pounds-to-kilograms values
| Pounds (lb) | Kilograms (kg) | How to read it |
|---|---|---|
| 10 | 4.536 | A small parcel or packed item. |
| 15 | 6.804 | A possible cabin-bag allowance; verify the airline's own limit. |
| 22 | 9.979 | Close to 10 kg, but slightly below it. |
| 44 | 19.958 | Close to 20 kg, with a difference of about 42 g. |
| 50 | 22.680 | Below 23 kg; those two baggage limits are not identical. |
| 70 | 31.751 | A heavier-bag or equipment reference point. |
| 150 | 68.039 | A body-weight example, often displayed as 68.0 kg. |
| 200 | 90.718 | Another practical body-weight reference point. |
How the conversion and rounding work
One international avoirdupois pound is exactly 0.45359237 kg. To convert pounds to kilograms, multiply the pound value by 0.45359237. For example:
50 lb x 0.45359237 = 22.6796185 kg
Automatic mode shows up to eight decimal places. One decimal place is often enough for body weight, while two or three decimals can be useful when checking luggage or parcel weights close to a limit. If a very small nonzero result would round to zero, the calculator keeps extra digits so the value remains visible.
Rounding only changes how the result is displayed. It does not change the conversion or make the original measurement more accurate. Choose a level of rounding that matches your scale and how the result will be used.
Common Questions about pounds and Kilograms
Is dividing pounds by 2.2 exact?
No. Dividing by 2.2 is useful for a quick estimate, but it is not exact. 1 lb equals exactly 0.45359237 kg, so this calculator uses that fixed value for the conversion.
Is 50 lb the same as 23 kg for luggage?
No. 50 lb = 22.6796185 kg, while 23 kg ≈ 50.7063 lb. This means 50 lb is about 0.32 kg below 23 kg. Always follow the number and unit shown on your booking.
How do I convert a weight written as pounds and ounces?
Use the separate pounds-and-ounces fields above. For example, 5 lb 8 oz = 5.5 lb, which converts to about 2.494758 kg.
How many decimal places should I use for body weight?
One decimal place is usually enough for body-weight records. Extra digits can show the conversion in more detail, but they do not make the original scale reading more accurate.
Can I use this result when buying a shipping label?
You can use it to convert the parcel's measured weight. Weigh the complete package, including the box, envelope, padding, and other packing materials. Then check the carrier's rules for rounding, dimensions, and billable weight before purchasing the label.