Calculators
Instant, accurate calculators for everyday math — percentages, age, health, and finance. No sign-up, no ads getting in the way of the number you need.
Popular Calculators
Percentage Calculator
Find a percentage of a number, or what percentage one number is of another.
Percentage Increase Calculator
Work out the percentage increase between two values.
Percentage Decrease Calculator
Work out the percentage decrease between two values.
Discount Calculator
Work out the sale price after a percentage discount.
Tip Calculator
Work out the tip and total bill, and split it between people.
Age Calculator
Find your exact age in years, months, and days from your birth date.
All Calculators
Percentage Calculator
Find a percentage of a number, or what percentage one number is of another.
Percentage Increase Calculator
Work out the percentage increase between two values.
Percentage Decrease Calculator
Work out the percentage decrease between two values.
Discount Calculator
Work out the sale price after a percentage discount.
Tip Calculator
Work out the tip and total bill, and split it between people.
Age Calculator
Find your exact age in years, months, and days from your birth date.
BMI Calculator
Calculate your Body Mass Index from your height and weight.
Loan Calculator
Estimate your monthly loan payment from the amount, rate, and term.
Compound Interest Calculator
See how an investment grows over time with compound interest.
BMR Calculator
Estimate your Basal Metabolic Rate — the calories your body burns at rest.
Mortgage Calculator
Estimate your monthly mortgage payment from home price, down payment, rate, and term.
Simple Interest Calculator
Calculate interest earned or owed using the simple interest formula.
VAT Calculator
Add or remove VAT from a price at any rate.
Sales Tax Calculator
Add or remove sales tax from a price at any rate.
Average Calculator
Find the mean, median, min, and max of a list of numbers.
Ratio Calculator
Simplify a ratio, or solve for a missing value in a proportion.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and simplify the result.
GPA Calculator
Calculate your Grade Point Average from letter grades and credit hours.
Date Difference Calculator
Find the exact time between two dates in years, months, and days.
Fuel Cost Calculator
Estimate the fuel cost of a trip from distance, consumption, and fuel price.
Salary Calculator
Convert between hourly rate and annual salary.
Calcul de l'impôt sur le revenu
Estimez votre impôt sur le revenu à partir du barème progressif 2024 et du quotient familial.
Calcul indemnité de licenciement
Calculez l'indemnité légale minimale de licenciement selon votre salaire et votre ancienneté.
Calcul bulletin de paie (brut en net)
Convertissez un salaire brut en net avec le détail de chaque cotisation salariale.
Square Root Calculator
Find the square root of any non-negative number.
Cube Root Calculator
Find the cube root of any number, including negatives.
GCD Calculator
Find the greatest common divisor of two numbers.
LCM Calculator
Find the least common multiple of two numbers.
Prime Number Checker
Check if a number is prime, and see its prime factors if not.
Leap Year Checker
Check whether a year is a leap year.
Days in Month Calculator
Find how many days are in any month of any year.
Unix Timestamp Converter
Convert between a Unix timestamp and a human-readable date.
Countdown Calculator
See a live countdown to any future date and time.
Related Guides
How to Calculate a Percentage
How to Calculate Percentage Increase
How to Calculate Percentage Decrease
How to Calculate a Discount
What Is BMI and How to Calculate It
Simple vs Compound Interest: What's the Difference?
How to Calculate Your Exact Age
How to Calculate GPA
Gross vs Net Salary: What's the Difference?
Comment calculer l'indemnité de licenciement
Comment calculer son impôt sur le revenu
How to Find the GCD and LCM of Two Numbers
How to Check If a Number Is Prime
What Is a Leap Year and Why Does It Exist?
Frequently Asked Questions
- Are the tools in Calculators free to use?
- Yes — every tool is free, with no sign-up and no usage limits.
- Does my data leave my browser?
- No — every tool in Calculators processes your input entirely on your device. Nothing is uploaded to a server.
- How do I find a specific tool?
- Use the search bar in the header, or browse the full list below — each tool links to a page with an explanation and a worked example.