Everyday Calculators & Tools
Percentages, dates, conversions, and more — free, fast, and no sign-up required.
Percentage Calculator
Percent of a number, percent change, and 'X is what percent of Y' — three modes in one.
Open tool →Age Calculator
Exact age in years, months, and days from any birth date to today or a target date.
Open tool →Date Difference Calculator
Days, weeks, months, and years between any two dates — with business-day option.
Open tool →Time Zone Converter
Find equivalent times across UTC, EST, PST, GMT, IST, and 100+ other zones.
Open tool →Fuel Cost Calculator
Trip gas cost from distance, MPG, and price per gallon — perfect for road trips.
Open tool →Unit Converter
Convert length, weight, volume, area, and temperature between metric and imperial.
Open tool →GPA Calculator
Semester or cumulative GPA on a 4.0 scale from letter grades and credit hours.
Open tool →Grade Needed Calculator
Final exam score required to reach a target grade in the course.
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