Calculators tools
Quick, focused calculators for everyday math. Every tool runs entirely in your browser — free, no sign-up, nothing uploaded.
Percentage Calculator
Work out percentages, increases and changes.
Aspect Ratio Calculator
Solve width, height and aspect ratio.
About calculators tools
Some sums come up again and again — a percentage discount, a growth rate, the height that keeps an image at 16:9. These focused calculators give you a clear, labelled answer for each without the ambiguity of doing it in your head, so you get the right result the first time.
Browse other categories