Main features
Percentage maths, done properly.
Several calculations
Work out a percentage, a ratio, an increase, a decrease or a discount - all the common types.
Instant results
The answer updates as you type, and you can paste numbers straight in to calculate.
History
Recent calculations are recorded automatically, handy when you want to compare or look back.
Local processing
Calculations run on your machine and are never uploaded to a server, so your privacy stays safe.