Math and everyday calculators

Discounts, mean, median and mode, standard deviation, ratios, scientific functions, random numbers and fuel economy.

Mean, median and mode calculator

Find the mean, median or mode of a list of numbers and see where each centre falls among your values.

Find the sale price after a percentage discount and how much you save, or work out the discount percentage from two prices.

Work out litres per 100 km or kilometres per litre from the distance driven and the fuel used on a trip.

Pick a whole number between two limits. The same seed always gives the same pick, so a draw can be repeated and checked.

Reduce a ratio such as 16 : 9 to a value per one, or scale it to a new size while keeping the same proportion.

Calculate square roots, whole-number powers, natural logarithms and the sine of an angle in degrees, to ten decimal places.

Measure how spread out a list of numbers is, as a population or a sample, with the mean and variance shown.