Calculators Tools
Percentages, discounts, tips, dates and ages — instant answers with zero friction.
5 tools
Percentage Calculator
Three percentage problems, one tool: X% of Y, X is what percent of Y, and percent increase or decrease.
Age Calculator
Calculate exact age in years, months and days from any birth date — plus countdown to the next birthday.
Discount Calculator
Work out sale prices instantly: single or stacked discounts, tax after discount, and exactly how much you save.
Tip Calculator
Calculate tips and split bills fairly: percentage presets, per-person amounts and round-up helpers.
Date Calculator
Add or subtract days, weeks, months and years from any date — or measure the exact duration between two dates.