Metric & Imperial weight conversions

What is 8.6 pounds in pounds and ounces?

Our converter does its sums properly.
We give the results in stones, pounds (lb) and ounces (oz), not as decimal fractions of a pound (8.nn lb).

If you need the actual formulas so you can do your own conversions to scientific accuracy, Wikipedia has a brilliant article covering Conversion of Units that encompasses every a huge array of calculations for every conceivable unit of measurement.

As a rough guide if you are measuring liquids: 1 ml of water equals 1 gram, 1 liter of water weighs approx 1 kg - other liquids may differ