Math calculators
Maths calculators for arithmetic, algebra, statistics, and number theory. From basic percentages to standard deviation — plain-language explanations included.
29 calculators
- ANOVA Calculator
A one-way analysis of variance for up to five groups. Paste each group as a list of numbers and the calculator returns the F statistic, the degrees of freedom, the p-value, eta-squared, and the full SS / df / MS table.
- Antilog Calculator
The antilogarithm is the inverse of the logarithm — antilog_b(x) = b^x. Enter an exponent x and a base; the calculator returns b^x plus 10^x, e^x and 2^x for reference.
- Arithmetic Sequence Calculator
Enter the first term, the common difference, and how many terms you want. The calculator lists every term, the nth term aₙ, and the running total Sₙ.
- 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.
- Binomial Distribution Calculator
Enter the number of trials, the probability of success on each trial, and the number of successes you are interested in. The calculator returns the exact binomial probability P(X = k), every cumulative probability around k, and the mean and standard deviation of the distribution.
- Chi-Square Test Calculator
A Pearson chi-square goodness-of-fit test on a single set of category counts. Paste observed counts and the calculator returns χ², degrees of freedom, the right-tailed p-value, and every cell’s contribution. Expected counts are optional — leave blank for a uniform distribution, or enter counts or ratios to test a specific hypothesis.
- 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.
- Five-Number Summary Calculator
Paste or type a list of numbers and the calculator returns Tukey's five-number summary — minimum, Q1, median, Q3 and maximum — plus the interquartile range, Tukey fences and any outliers.
- 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.
- Geometric Mean Calculator
Paste or type any list of positive numbers. The calculator returns the geometric mean — the right average for growth rates, compounding returns, and ratios — alongside the arithmetic and harmonic means for comparison.
- Geometric Sequence Calculator
Enter the first term, the common ratio, and how many terms you want. The calculator lists every term, the nth term aₙ, the partial sum Sₙ, and — when |r| < 1 — the infinite sum S∞.
- Harmonic Mean Calculator
Paste or type any list of positive numbers. The calculator returns the harmonic mean — the right average for rates and ratios — alongside the geometric and arithmetic means for comparison.
- 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.
- Percentage Calculator
Pick the question you need answered — a percentage of a number, one number as a percentage of another, or the percentage change between two numbers — and enter the two values.
- 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.