What does a UK stone in pound?

There are 14 pounds (lb) in a UK stone (st). So, 1 st = 14 lb.

For Example

If a person weighs 10 st, then their weight is 10 st * 14 lb/st = 140 lb.

Similarly, if a bag of rice weighs 2.5 st, then its weight is 2.5 st * 14 lb/st = 35 lb.