Free Calculators
Age, percentage, date and hours calculators with instant answers.
All 9 calculators
Pick a tool to get started — every one is free and works in your browser.
Age Calculator
Find your exact age in years, months and days.
Open toolPercentage Calculator
Calculate percentages, percentage change and more.
Open toolDate Calculator
Count days between dates, or add and subtract days.
Open toolHours Calculator
Weekly time card: hours worked, overtime and pay.
Open toolGPA Calculator
Semester and cumulative GPA on a 4.0 scale.
Open toolFinal Grade Calculator
What do I need on my final exam?
Open toolScientific Calculator
Free online scientific calculator with trig, logs and more.
Open toolGas Mileage Calculator
MPG, L/100 km and fuel cost per mile.
Open toolFuel Cost Calculator
How much gas a road trip will cost.
Open toolAbout our calculators
Quick, accurate calculators for everyday questions. How old am I exactly? What is 15% of 240? How many days until a deadline? How many hours did I work this week? Type your numbers and the answer updates as you go.
Every calculator shows the working, so you can check the result and learn the method.