Basic Math

Average eight values (0–100) with sum, median and highest/lowest rows for instant insight into your numbers.

Perform quick arithmetic — add, subtract, multiply, divide, or find the modulo remainder — between any two numbers in seconds.

Add, subtract, multiply and divide numbers up to 10^30 with exact and compact results. Fast arithmetic for very large values online.

Find the greatest common factor, common divisors, LCM and simplest ratio of any two numbers.

Solve any exponential equation: enter two of base, exponent and result and compute the third, with the laws of exponents explained.

Add, subtract, multiply and divide two fractions with instant results reduced to simplest form, plus their decimal equivalent.

Find the greatest common factor, least common multiple and simplest ratio of any two numbers up to 10000.

Find the least common multiple and greatest common divisor of any two numbers up to 1000, with the exact integer result instantly.

Solve log_b(x) = y for any one of the base, the argument or the exponent, with common log, natural log and base conversion support.

Solve long division problems for free — enter dividend and divisor to get the integer quotient, the remainder and the exact decimal value.

Free basic math calculator for addition, subtraction, multiplication, division and modulo, with percentages, squares and more.

Find the nth term and the sum of the first n terms for arithmetic or geometric sequences, with the average term value and the common step.

Compute the percent error between an observed measurement and an exact value, with signed error and absolute difference for accuracy checks in labs and quality control.

Find the smallest prime factor of any number up to 99,999, learn whether it is prime, and read an Euler totient estimate alongside the largest possible factor.

Analyze the prime factorization of any number up to 99,999: find the smallest and largest prime factors, the exponent of the smallest factor and the remaining cofactor.

Simplify any ratio to its lowest terms and split any total amount between two parts. Great for recipes, mixing and sharing money.

Free root calculator that finds square roots, cube roots, and any nth root of a number with instant results and verification.

Round any number to the desired decimal places under five standard modes: half up, half down, half to even, up or down, with whole-number and nearest-ten views.

Evaluate trigonometric, logarithmic, exponential and power functions on any value, in degrees or radians, with instant results.

Convert between ordinary decimal numbers and scientific notation (m × 10ⁿ) instantly, in either direction.