Maths & Science Calculators

11 free calculators · Updated for 2026/27

Maths problems from homework, coursework and everyday work usually need a quick, reliable answer rather than a lesson. Calculators in the maths group handle fractions, powers and logarithms, statistics, probability and number systems, with related values shown alongside (a mixed number and decimal, or the variance and range) so an answer can be sense-checked rather than simply copied. They suit revision, marking and any task where a value has to be converted into another form.

Adding, subtracting, multiplying and dividing fractions is handled by the Fraction Calculator, which returns the simplified fraction, mixed number and decimal together. The Standard Deviation Calculator turns a set of numbers into variance, mean, median and range, the Probability Calculator covers combined events along with combinations and permutations, and the Binary / Hex / Decimal Converter moves a value between binary, decimal, hexadecimal and octal. The Prime Number Checker tests a number and gives its prime factorisation.

S

Square Root, Powers & Logarithm Calculator

Calculate square roots, cube roots, custom powers, and logarithms (log10, ln, log2).
F

Fraction Calculator

Add, subtract, multiply and divide fractions. Shows simplified result, mixed number and decimal.
S

Standard Deviation Calculator

Calculate standard deviation, variance, mean, median, min, max and range from a set of numbers.
M

Mean, Median & Mode Calculator

Calculate mean, median, mode, range, sum, min and max from a set of numbers. Shows sorted data.
B

Binary / Hex / Decimal Converter

Convert between binary, decimal, hexadecimal and octal number systems instantly.
P

Probability Calculator

Calculate event probabilities, combinations and permutations. P(A or B), P(A and B), nCr, nPr.
R

Roman Numeral Converter

Convert between decimal numbers and Roman numerals (I, V, X, L, C, D, M). Both directions.
T

Trigonometry Calculator

Calculate sin, cos, tan and inverse functions in degrees or radians. Includes sec, csc, cot.
P

Prime Number Checker

Check if a number is prime, find prime factorisation, and list primes up to N.
E

Exponent / Power Calculator

Calculate any number raised to any power. See common powers of your base number.
L

Logarithm Calculator

Calculate log₁₀, ln, log₂ and custom base logarithms. Includes antilog and log rules.