Calculators
Calculate percentages, discounts, and other common calculations.
30 tools in this category
Age Calculator
Calculate exact age in years, months, days, and total days from a birth date.
Amortization Calculator
Estimate loan payment, total interest, and a simple amortization schedule.
Compound Interest Calculator
Estimate future value, total contributions, and interest earned with compounding.
Date Difference Calculator
Calculate days, weeks, months, and years between two dates.
Day of the Week Calculator
Find the weekday for any date.
Decimal to Fraction Converter
Convert decimals into simple fraction approximations.
Discount Calculator
Calculate sale price, savings, and final total after discount.
Factorial Calculator
Calculate factorial values for whole numbers.
Fraction to Decimal Converter
Convert fractions into decimal values.
GCD LCM Calculator
Find the greatest common divisor and least common multiple.
GPA Calculator
Calculate GPA from grades and credit hours.
Hourly to Salary Calculator
Convert hourly pay into annual, monthly, and weekly salary estimates.
Leap Year Checker
Check whether a year is a leap year.
Loan Calculator
Estimate monthly payment, total interest, and total cost for a loan.
Matrix Calculator
Calculate a 2x2 matrix determinant and inverse.
Percentage Calculator
Calculate percentages, percentage increase/decrease, and solve common percentage problems.
Percentage Increase Calculator
Calculate percentage increase or decrease between two values.
Prime Number Checker
Check whether a whole number is prime.
Probability Calculator
Calculate independent event probabilities.
Roman Numeral Converter
Convert numbers to Roman numerals and Roman numerals back to numbers.
Salary to Hourly Calculator
Convert annual salary into hourly, weekly, and monthly pay estimates.
Sales Tax Calculator
Add or remove sales tax from a price with any tax rate.
Scientific Calculator
Evaluate common scientific calculator expressions in your browser.
Simple Interest Calculator
Calculate simple interest and total amount from principal, rate, and time.
Standard Deviation Calculator
Calculate sample standard deviation from a list of values.
Time Duration Calculator
Calculate time between two times and subtract breaks.
Timer & Stopwatch
Use a simple browser timer and stopwatch with no app install.
Unit Converter
Convert length, weight, temperature, volume, and speed units instantly.
Variance Calculator
Calculate sample variance from a list of values.
VAT Calculator
Calculate VAT, tax-inclusive, and tax-exclusive prices instantly.
Popular Calculators tools
Start with these frequently used tools in this category, or browse the full list above.
- Age Calculator — Calculate exact age in years, months, days, and total days from a birth date.
- Amortization Calculator — Estimate loan payment, total interest, and a simple amortization schedule.
- Compound Interest Calculator — Estimate future value, total contributions, and interest earned with compounding.
- Date Difference Calculator — Calculate days, weeks, months, and years between two dates.
- Day of the Week Calculator — Find the weekday for any date.
- Decimal to Fraction Converter — Convert decimals into simple fraction approximations.
- Discount Calculator — Calculate sale price, savings, and final total after discount.
- Factorial Calculator — Calculate factorial values for whole numbers.
About Calculators
Explore our collection of free calculators tools. All tools run directly in your browser, keeping your data private and secure. No sign-up required.
Whether you need to age calculator, amortization calculator, compound interest calculator, our tools are designed to be fast, simple, and effective. Bookmark your favorites for quick access.