Math
The things you always try to do in your head, then give up and open Google.
Percentages
What is X% of Y, or the percentage change between two numbers.
Calculator
Simple calculator — add, subtract, multiply, divide, percentage.
VAT Calculator
Add or remove VAT from a price — adjustable rate.
Discount Calculator
Calculate price after discount, savings, or original price.
Unit Converter
Convert between length, weight, temperature, area and speed.
Geometry Calculator
Area, perimeter and volume of common geometric shapes.
Pythagorean Theorem
Find the missing side of a right triangle.
Statistics Calculator
Mean, median, mode and standard deviation of a number list.
Powers & Roots
Calculate a power (bⁿ) and nth root of a number.
Trigonometry
sin, cos, tan for any angle + degrees to radians.
Quadratic Equation
Solve ax² + bx + c = 0 with discriminant and step-by-step solution.
Linear Equation
Solve ax + b = cx + d — with step-by-step solution.
Combinations & Permutations
Calculate C(n,r), P(n,r) and n! with step-by-step.
Probability Calculator
Basic probability, addition rule, multiplication rule and conditional.
Factoring Calculator
Factor a quadratic expression and prime factorization.
Age Calculator
Precise age in years, months and days.
BMI Calculator
Body mass index with result interpretation.
Number to Words
Convert a number to words in English and Hebrew.
Loan Calculator
Monthly payment, total interest and total cost.
Tip Calculator
Calculate tip, total bill and split by people.
Date Calculator
Days between two dates, or add/subtract days from a date.
Mortgage Calculator
Monthly payment and total interest — two tracks.
Currency Converter
Exchange rates — dollar, euro, pound and 30+ currencies.
Net Salary Calculator
Gross to net salary — tax and social insurance.
Investment Calculator
Compound interest with monthly deposits — how much will you have?
Aspect Ratio Calculator
Calculate aspect ratio for images, video and screens.
Stopwatch / Timer
Stopwatch with laps, and countdown timer.
Birth Year Calculator
Enter an age — get the estimated birth year.
Daily Water Intake
Calculate how much water you need per day based on weight and activity.
Sleep Calculator
Calculate when to wake up or go to sleep based on sleep cycles.
GCD & LCM Calculator
Calculate the Greatest Common Divisor (GCD) and Least Common Multiple (LCM).
Prime Number Checker
Check if a number is prime and find its prime factorization.
Retirement Calculator
Plan your retirement — years left and how much savings you'll need.
Calorie Calculator
Calculate BMR and TDEE using the Harris-Benedict formula.
Scientific Calculator
Scientific calculator with trigonometric functions, logarithm and more.
Matrix Calculator
Add, subtract, multiply matrices, compute determinant and transpose online.