Pregnancy Times:  A calculator which enables you to work out the approximate date on which your baby may be due.

Female weight/male weight: What is the "average" weight for a typical person of your height and gender? Find out here.

Smoking costs:  How much do you think you could save each year if you gave up smoking.  Work it out here - you may be pleasantly (or unpleasantly) surprised.

Body Mass Index / Body Fat calculator:  These two interactive calculators help you to work out how much of your body is made up of fat, and whether you may be designated as clinically overweight or not.  Try them out and see for yourself.