Math & Utilities
Free mathematical and conversion tools
Useful calculators for everyday math, conversions, and practical calculations. Perform calculations, convert units, work with percentages, dates, and more with our versatile utility calculators.
Available Calculators
Simple Calculator
Fast and easy basic calculator for everyday calculations
Scientific Calculator
Advanced calculator with trigonometry and scientific functions
Percentage Calculator
Calculate percentages, increases, and decreases
Age Calculator
Calculate exact age in years, months, and days
GPA Calculator
Calculate grade point average for academic performance
Time Duration Calculator
Calculate time difference between two dates or times
Fraction Calculator
Add, subtract, multiply, and divide fractions with steps
Rule of 72 Calculator
Calculate investment doubling time using Rule of 72
Unit Conversion Calculator
Convert between different units of measurement
Frequently Asked Questions
How do I calculate percentages?
Our Percentage Calculator handles all types: finding X% of a number, what percentage X is of Y, and percentage increases/decreases. Just enter your values and get instant results.
What is the Rule of 72?
The Rule of 72 is a quick way to estimate how long it takes money to double. Divide 72 by your interest rate to get approximate years. Our calculator shows both the estimate and exact calculation.
Are age calculations accurate?
Yes, our Age Calculator accounts for leap years and provides exact calculations down to the day. It also includes fun facts like your zodiac sign and days until your next birthday.
Simplify Your Daily Calculations
From percentages to unit conversions, our math utilities make everyday calculations quick and easy.