🔢 Math & Conversions
Math calculators handle the everyday calculations that used to mean digging for a calculator app or scribbling on scrap paper. Percentages, fractions, ratios, unit conversions, and roots. The operations you actually need for school, work, and daily life.
Binary Calculator
Convert between binary, octal, and decimal number systems.
Combinations and Permutations
Calculate combinations (nCr) and permutations (nPr) for any values.
Electricity Calculator
Calculate electricity costs for any appliance based on power, usage, and rate.
Factorial Calculator
Calculate the factorial of any number up to 170.
Fraction Calculator
Add, subtract, multiply, and divide fractions, or convert a decimal to its fraction form.
Fuel Cost Calculator
Calculate trip fuel costs based on distance, efficiency, and fuel price.
Hex Calculator
Convert between hexadecimal, decimal, and binary number systems.
Percentage Calculator
Calculate percentages, percentage changes, and more.
Prime Numbers Calculator
Check if a number is prime, find prime factors, and list primes up to any value.
Roman Numeral Converter
Convert between Roman numerals and numbers (1-3999).
Scientific Calculator
Perform advanced math with trigonometric, logarithmic, and exponential functions.
Scientific Notation Converter
Convert between decimal and scientific notation instantly.
Significant Figures Calculator
Count significant figures and round numbers to a specified number of sig figs.
Speed Converter
Convert between mph, km/h, knots, meters per second, and Mach speed.
Ratio Calculator
Simplify ratios and find missing values in proportions.
Time Converter
Convert between seconds, minutes, hours, days, weeks, and more.
Square Root Calculator
Calculate square roots and nth roots of any number.
Unit Converter
Convert between units of length, weight, volume, temperature, and more.
Average Calculator
Find the mean, median, mode, and range of any list of numbers.
Half Life Calculator
Work out how much of a decaying sample is left, or how long it takes to reach a target amount.
Logarithm Calculator
Calculate logarithms in any base, plus antilogs and powers.
Percent Error Calculator
Calculate percent error between an experimental and an accepted value.
Quadratic Equation Solver
Solve any quadratic equation and see the roots, discriminant, and vertex.
Distance Calculator
Find the distance between two points, convert distance units, or get a hypotenuse.
GCD and LCM Calculator
Find the greatest common divisor and least common multiple of any numbers.
Slope Calculator
Find the slope, equation, angle and intercepts of a line from two points.
Everyday Math, No Memorization
Not everyone carries multiplication tables in their head, and that is fine. These calculators handle the mechanics so you can focus on what the numbers mean. Convert measurements for a recipe, check your work on homework, quickly figure a percentage during a sale. The math is done correctly every time.
Conversions Without the Confusion
Unit converters solve the practical problem of switching between measurement systems. Whether you are following a recipe that uses metric, checking luggage weight limits in pounds, or converting miles to kilometers for a road trip abroad, the right conversion is one click away.