Math & Numbers

Full expression calculator with history.

Add, subtract, multiply and divide fractions and simplify.

X% of Y, percentage increase or decrease, and what % is X of Y.

Simplify and scale ratios.

Check if a number is prime and list the next N primes.

GCD and LCM for multiple numbers.

Factorial with large number support.

Convert between binary, octal, decimal and hex.

Convert between Roman numerals and integers.

Mean, median, mode, standard deviation and variance from a list.

Random numbers with range, count and seed options.

Compute a mod b with step-by-step explanation.

nCr and nPr calculator.

Round numbers to N significant figures.

Convert between standard and scientific notation.