%
Percentage calculator
Percent of a number, percentage change, reverse percentages
VAT
VAT calculator (UK)
Add or remove VAT at 20%, 5% or any rate
$
Tip calculator
Tip, total and each share, with rounding
×
Multiplication chart
The 1 to 12 chart, interactive and printable
Each calculator shows the working under the result, and each page explains the method so you can do the same sum without a calculator next time.
Do it in your head next time
Kalc trains times tables, fractions, percentages and algebra in about ten minutes a day.