How it works
- 01Type the weight in pounds. Fractions like 1/2 work too.
- 02Kilograms appear as you type. Type in the kilograms box to convert the other way.
- 03Use the chart for common weights, or switch to ounces, stone or grams.
Questions
›What are some common lbs to kg conversions?
1 lb = 0.453592 kg, 10 lb = 4.53592 kg, 100 lb = 45.3592 kg, 150 lb = 68.0389 kg and 200 lb = 90.7185 kg.
›How many kilograms are in a pound?
Exactly 0.45359237 kg. That has been the international definition of the pound since 1959.
›Is there a quick way to do it in my head?
Halve the pounds, then take away 10% of the result. For 150 lb: 75 − 7.5 = 67.5 kg, against an exact answer of 68.04 kg.
›How do I convert pounds and ounces?
There are 16 ounces in a pound, so 7 lb 8 oz is 7.5 lb, or 3.40 kg. You can also pick ounces as the from unit and type the total.
›Is my data uploaded anywhere?
No. This tool runs entirely in your browser, and Rounder never sends what you type or drop in to a server, ours or anyone else's. Once the page has loaded, along with any AI model the tool uses, it even works offline.
Popular conversions
Unit converterCM to inchesKG to lbsCelsius to FahrenheitKM to milesFeet to metersmL to ozMPH to km/h