Maths & Science

Add, subtract, multiply and divide fractions with step-by-step working. Shows results as improper fraction, mixed number and decimal

Calculate logarithms in any base with presets for log10, natural log and log2 plus antilog and change of base formula

Generate printable maths worksheets with addition, subtraction, multiplication, and division. Set difficulty, number range, and question count. Includes answer keys.

Calculate percentages easily — find X% of a number, percentage change, increase and decrease. Four calculators in one tool.

Interactive times tables drill with instant feedback and score tracking. Pick your tables, race the clock, and print practice worksheets. Perfect for kids and classrooms.

Find the GCF and LCM of two or more numbers with prime factorisation and step-by-step Euclidean algorithm working

Check if a number is prime, see its factors if composite, and find the next 10 prime numbers with list primes up to N

Convert between standard and scientific notation showing mantissa and exponent separately for very large and small numbers

Calculate percentages easily — find X% of a number, percentage change, increase and decrease. Four calculators in one tool.

Calculate the percentage change between two values. Shows increase or decrease with colour coding, absolute change and the formula used

Calculate a value after a percentage decrease, or find what percentage decrease goes from one value to another. Two-way calculation with formula

Calculate the percentage difference between two values. Unlike percent change, this is order-independent and uses the average as the base

Calculate a value after a percentage increase, or find what percentage increase goes from one value to another. Two-way calculation with formula

Calculate the area of rectangles, circles, triangles, trapezoids, ellipses and parallelograms. Shows formula and step-by-step working

Calculate the volume of common 3D shapes including cube, sphere, cylinder, cone and pyramid with results in cubic cm, m and litres

Find the missing side of a right triangle or check if three sides form a right triangle. Visual SVG diagram with step-by-step working

Calculate volume in cubic feet from length, width and height. Supports feet, inches, cm, metres and yards with conversions to litres, gallons and more

Calculate the volume of common 3D shapes including cube, sphere, cylinder, cone and pyramid with results in cubic cm, m and litres

Calculate the area of rectangles, circles, triangles, trapezoids, ellipses and parallelograms. Shows formula and step-by-step working

Calculate the volume of common 3D shapes including cube, sphere, cylinder, cone and pyramid with results in cubic cm, m and litres

Add, subtract, multiply and divide fractions with step-by-step working. Shows results as improper fraction, mixed number and decimal

Add, subtract, multiply and divide mixed numbers and fractions. Convert between mixed numbers, improper fractions and decimals with step-by-step working

Generate random numbers, roll dice, flip coins and pick random colours. Bulk generation with configurable ranges and duplicate control

Check if a number is prime, see its factors if composite, and find the next 10 prime numbers with list primes up to N

Calculate probability, combinations (nCr), permutations (nPr) and independent events with formulas and step-by-step working

Calculate mean, median, mode, variance and standard deviation for any dataset. Shows step-by-step working and visual distribution

Calculate the percentage change between two values. Shows increase or decrease with colour coding, absolute change and the formula used

Calculate a value after a percentage increase, or find what percentage increase goes from one value to another. Two-way calculation with formula

Calculate the percentage change between two values. Shows increase or decrease with colour coding, absolute change and the formula used

Calculate a value after a percentage decrease, or find what percentage decrease goes from one value to another. Two-way calculation with formula

Generate printable maths worksheets with addition, subtraction, multiplication, and division. Set difficulty, number range, and question count. Includes answer keys.

Interactive times tables drill with instant feedback and score tracking. Pick your tables, race the clock, and print practice worksheets. Perfect for kids and classrooms.

Find the GCF and LCM of two or more numbers with prime factorisation and step-by-step Euclidean algorithm working

Check if a number is prime, see its factors if composite, and find the next 10 prime numbers with list primes up to N

Solve quadratic equations with step-by-step working showing discriminant calculation and real or complex roots

Calculate the actual width and height of a screen from its diagonal size and aspect ratio. Useful when buying monitors, TVs, or tablets.

Calculate sin, cos, tan, csc, sec and cot for any angle in degrees or radians with visual unit circle indicator