โ Basic Math & Numbers
Free basic math calculators: fractions, percentages and percent change, ratios, LCM and GCD, exponents, logarithms, number bases, Roman numerals and more.
The everyday arithmetic that slips memory: fraction operations with steps, percentage change between two values, ratio simplification, LCM and GCD, plus quick roots, exponents and logarithms.
Number-system helpers convert between binary, octal, decimal and hex, and Roman numerals both ways. Significant-figures and scientific-notation tools keep results honest in labs and homework alike.
Basic Calculator
A clean, fast basic calculator for everyday math. Add, subtract, multiply, divide, use percentages and toggle signs โ all running locally in your browser.
Exponent Calculator
Raise any base to any power. Enter a base and an exponent to get the result instantly โ supports positive, negative and fractional exponents.
Factorial Calculator
Compute the factorial of any non-negative integer instantly.
Fraction Calculator
Add, subtract, multiply, and divide fractions instantly. Get simplified results with step-by-step math. Perfect for students, teachers, and everyday use.
LCM & GCD Calculator
Find the least common multiple and greatest common divisor instantly.
Log Calculator
Compute logarithms with any base. Enter a number and a base to get logโ(x), plus the natural log ln and common log logโโ for convenience.
Number Base Converter
Convert between binary (base 2), octal (base 8), decimal (base 10) and hexadecimal (base 16) with full precision. Works with negatives and fractions.
Percentage Change Calculator
Find the percentage increase or decrease between any two values.
Prime Number Checker
Instantly check if any number is prime with full factorization.
Ratio Calculator
Simplify, scale, and solve ratios for any proportion.
Roman Numeral Converter
Convert Arabic numbers to Roman numerals and back instantly.
Scientific Calculator
Perform advanced calculations with trigonometry, logarithms, exponents, and more. A full-featured scientific calculator that runs entirely in your browser.
Scientific Notation Calculator
Convert any number into scientific notation, engineering notation and e-notation. Enter a value and see all three standard forms at once.
Number Sequence Calculator
Identify and extend arithmetic and geometric sequences. Enter the first few terms to find the common difference or ratio, the next terms, the nth term and the partial sum.
Significant Figures Calculator
Round any number to the exact number of significant figures you need. Enter a value and the target sig-fig count to get a precise, correctly rounded result.
Square Root Calculator
Find the square root, cube root or any nth root of a number. Enter a value and a root degree to get an instant, precise result.
Frequently asked questions
Do the fraction calculators show the steps?
Yes โ sums, differences, products and quotients come with the intermediate common-denominator steps, not just the final reduced answer.
How is percentage change calculated?
Difference divided by the original value; the tools also flag the direction of change and handle negative bases explicitly.
What can the number base converter do?
Instant two-way conversion between binary, octal, decimal and hexadecimal, with bit widths shown for engineering use.