Percentage
What is x percent of y, what percent is a of b, and the percentage change from A to B.
Open a calculatorBrowse by tag
Conversion calculators
Percentages, units, and ECB currency rates.
Percent change
How much a figure moved, as a percent of the starting value.
Open a calculatorUnit converter
Weight, length, distance and temperature. Common units, no lookup table.
Open a calculatorCurrency
Euro, zloty, dollar and the other ECB currencies. The reference rate from the last TARGET business day.
Open a calculatorTime on the road
Hours and minutes for a distance at a constant speed.
Open a calculatorRecipe scale
Scale one amount from the servings the recipe was written for.
Open a calculatorPaint needed
Litres from wall area, coats and the tin’s m² per litre.
Open a calculatorFlooring
How many packs of floor from room area, waste and the box coverage.
Open a calculatorWallpaper
How many rolls from wall perimeter, height, roll size and waste.
Open a calculatorConcrete slab
Cubic metres for a rectangular slab, with a waste percent.
Open a calculator