Free Online Calculators & Tools
50+ fast, free calculators and tools. No signup required.
Math Calculators
Scientific Calculator
Trigonometry, logarithms, exponents and more
Percentage Calculator
Calculate percentages, increases, decreases
Fraction Calculator
Add, subtract, multiply, divide fractions
Average Calculator
Mean, median, mode and range
Square Root Calculator
Square roots, cube roots, perfect squares
Standard Deviation
Population and sample SD, variance
GCF & LCM Calculator
Greatest common factor & least common multiple
Factorial Calculator
Calculate n! for any number
Quadratic Solver
Solve ax² + bx + c = 0
Random Number Generator
Generate random numbers in any range
Finance Calculators
Mortgage Calculator
Monthly payments, interest, amortization
Compound Interest
Investment growth over time
Loan Calculator
Monthly payment for any loan
Discount Calculator
Sale price and savings calculator
Tip Calculator
Calculate tips and split bills
Electricity Cost
Power consumption & cost calculator
Fuel Cost Calculator
Trip fuel cost & gas mileage
Grade Calculators
Conversion Tools
Temperature Converter
Celsius, Fahrenheit, Kelvin
Length Converter
Meters, feet, inches, km, miles
Weight Converter
Kg, pounds, ounces, grams, stones
Speed Converter
km/h, mph, m/s, knots, Mach
Area Converter
sq ft, acres, hectares, sq meters
Volume Converter
Liters, gallons, cups, mL, fl oz
Pressure Converter
PSI, bar, atm, Pascal, torr
Number Base Converter
Binary, decimal, hex, octal
Color Converter
HEX, RGB, HSL with color picker
Data Storage Converter
Bytes, KB, MB, GB, TB, bits
Electrical
Text Tools
Health
Time
Utility Tools
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