Math calculators
Maths calculators for arithmetic, algebra, statistics, and number theory. From basic percentages to standard deviation — plain-language explanations included.
19 calculators
- Average Calculator
Paste or type a list of numbers — separated by commas, spaces or new lines — and the calculator returns the mean, median, mode and range, alongside the sum, count, minimum and maximum.
- Big Number Calculator
Perform exact arithmetic on integers of any size — no rounding, no overflow. Powered by JavaScript BigInt for arbitrary-precision results.
- Confidence Interval Calculator
Enter your sample mean, standard deviation and sample size, choose a confidence level, and the calculator returns the confidence interval for the population mean along with the margin of error and standard error.
- Distance Between Two Points Calculator
Find the straight-line (Euclidean) distance between any two points in 2D or 3D space. Enter the x, y, and z coordinates of each point — leave z at 0 for a 2D problem.
- Exponent Calculator
Enter a base and an exponent and the calculator returns b raised to the power n. Works for positive, negative, integer and fractional exponents, with automatic scientific-notation output for extreme results.
- Factor Calculator
Enter any whole number and the calculator lists every positive factor (divisor), its prime factorisation, all of its factor pairs, and σ(n) — the sum of its divisors — along with whether the number is prime, composite, or perfect.
- Fraction Calculator
Pick an operation, enter two fractions, and the calculator returns the exact answer in lowest terms — along with the decimal value, mixed-number form, and the unsimplified intermediate so you can follow the working.
- GCF Calculator
Enter any list of whole numbers and the calculator returns the greatest common factor — the largest positive integer that divides every input exactly — along with its prime factorisation, all of its divisors, and the Euclidean reduction steps.
- Hex Calculator
Convert any number between hexadecimal, decimal, binary, and octal — all four representations side by side.
- LCM Calculator
Enter any list of whole numbers and the calculator returns the lowest common multiple — the smallest positive integer that every input divides into exactly — along with the greatest common divisor and the reduction steps.
- Logarithm Calculator
Pick a base (10, e, 2, or any positive number ≠ 1) and enter a positive argument x. The calculator returns log_b(x) plus the three standard logs alongside.
- Number Sequence Calculator
Generate arithmetic and geometric sequences from a first term and a common difference or ratio. The calculator returns the nth term, the partial sum, the list of terms, and (where it exists) the infinite geometric sum.
- P-Value Calculator
Convert a z, t or chi-squared test statistic into a p-value. Pick one- or two-tailed, enter your degrees of freedom (for t and χ²), and the calculator returns the exact p-value and whether the result is significant at α = 0.05 and α = 0.01.
- Percent Error Calculator
Enter a measured (experimental) value and an actual (true) value to see the percent error — the standard metric used in physics, chemistry, and engineering labs to express how close a measurement is to the accepted value.
- Quadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0 for its real or complex roots, with the discriminant, vertex and axis of symmetry shown alongside.
- Ratio Calculator
Enter two ratios A : B and C : D. The calculator simplifies each to lowest terms, shows the decimal and percentage values, tests whether the ratios are equivalent by cross-multiplication, and reports the scale factor between them.
- Root Calculator
Enter a number and a root degree to compute the nth root. Square root (n=2), cube root (n=3), or any higher integer degree. Odd roots of negative numbers return a negative real result; even roots of negative numbers return a complex-number message.
- Sample Size Calculator
Determine the minimum number of respondents needed to estimate a population proportion at a chosen confidence level and margin of error. Optional finite-population correction tightens the requirement when the population is small.
- Standard Deviation Calculator
Paste or type a list of numbers and the calculator returns the standard deviation and variance, with a toggle between the sample (n − 1) and population (n) variants. Mean, sum of squared deviations and range are shown alongside.