Percentage Calculator
X% of Y, what-percent-is-this, percentage change, mark-ups, discounts and reverse percentages — each answer comes with the working spelled out in plain English. Nothing leaves your machine.
When would I use this?
Splitting a bill, checking a discount, working out VAT backwards from a receipt, sanity-checking “sales are up 12%” in a report, or just refusing to open a spreadsheet for one number. Pick what you’re working out, type the numbers, and the answer appears as you type — along with every step of the arithmetic written out in plain English, so you can paste the working into an email and show exactly how you got there. Nothing is uploaded anywhere; it all happens on your computer.
01 What are you working out?
02 Answer & working
Type your numbers above and the answer appears here as you type — no Calculate button needed.