Math & Numbers

These tools are for anyone who needs quick percentage or number answers: students checking work, shoppers comparing discounts, or anyone doing “X% of Y” or percent change without opening a spreadsheet.

Common tasks include working out a tip as a check against this category’s percentage tools, finding a sale price, comparing two values as a percent, or converting between number formats. Everything runs in the browser—no sign-up or app install.

Pick the percentage calculator when you need “percent of,” “what percent,” or percent change in one place. Use the discount calculator when you have an original price and a percent-off or amount-off and want the final price and savings shown clearly.

If you are budgeting or comparing quotes, write down the inputs with the result so you can reproduce the same math later. For mortgages, loans, and compound growth, switch to Money & Finance rather than shoehorning those problems into a simple percent tool.