Free Math & Everyday Calculators
From figuring out the tip at dinner to calculating your exact age in days or your weighted GPA, these calculators handle the everyday math you don't want to do by hand. Clean inputs, instant results, mobile-friendly.
Calculate exact age in years, months, days, hours, and seconds from any birth date.
Find days between two dates, or add/subtract days, weeks, months, or years from any date.
Find X% of Y, what percent X is of Y, and the percent change between two numbers — instantly.
Calculate tip, total, and per-person split for any restaurant bill — with quick-pick tip percentages.
About our math tools
Everyday math calculators for ages, percentages, dates, tips, GPAs and discounts.
Every tool in the Math & Everyday Calculators collection is engineered for speed and accuracy. We use battle-tested formulas, follow accessibility best practices (WCAG 2.2 AA), and pre-render every page to static HTML so results appear the moment you open the page — even on slow mobile connections.
Privacy is the foundation of Math. Inputs you type, files you select, and outputs you generate stay on your device. There is no upload step, no telemetry beyond anonymized page views, and no third-party tracking on tool calculation logic. That's why teachers, students, marketers, developers and everyday users return to WebGenAI thousands of times per month.
If you have a tool you'd like us to add to the math collection, let us know. We ship new tools every week based on what real users request.