Maths
10Fraction Calculator
Add, subtract, multiply and divide fractions with step-by-step working. Shows results as improper fraction, mixed number and decimal
🔬 Maths & ScienceLogarithm Calculator
Calculate logarithms in any base with presets for log10, natural log and log2 plus antilog and change of base formula
🔬 Maths & ScienceMaths Worksheet Generator
Generate printable maths worksheets with addition, subtraction, multiplication, and division. Set difficulty, number range, and question count. Includes answer keys.
📚 EducationNumber to Words Converter
Convert any number to written English words. Supports negatives, decimals, and numbers up to quadrillions. Toggle between UK and US English formats.
🔬 Maths & SciencePercentage Calculator
Calculate percentages easily — find X% of a number, percentage change, increase and decrease. Four calculators in one tool.
🔬 Maths & ScienceSum Calculator
Add up numbers instantly. Paste numbers in any format - one per line, comma-separated, or mixed in with text. Shows sum, average, min, max, and count.
🔬 Maths & ScienceTimes Tables Practice
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.
📚 EducationGreatest Common Factor Calculator
Find the GCF and LCM of two or more numbers with prime factorisation and step-by-step Euclidean algorithm working
🔬 Maths & SciencePrime Number Checker
Check if a number is prime, see its factors if composite, and find the next 10 prime numbers with list primes up to N
🔬 Maths & ScienceScientific Notation Converter
Convert between standard and scientific notation showing mantissa and exponent separately for very large and small numbers
🔬 Maths & SciencePercentage
5Percentage Calculator
Calculate percentages easily — find X% of a number, percentage change, increase and decrease. Four calculators in one tool.
🔬 Maths & SciencePercent Change Calculator
Calculate the percentage change between two values. Shows increase or decrease with colour coding, absolute change and the formula used
🔬 Maths & SciencePercentage Decrease Calculator
Calculate a value after a percentage decrease, or find what percentage decrease goes from one value to another. Two-way calculation with formula
🔬 Maths & SciencePercentage Difference Calculator
Calculate the percentage difference between two values. Unlike percent change, this is order-independent and uses the average as the base
🔬 Maths & SciencePercentage Increase Calculator
Calculate a value after a percentage increase, or find what percentage increase goes from one value to another. Two-way calculation with formula
🔬 Maths & ScienceGeometry
3Area Calculator
Calculate the area of rectangles, circles, triangles, trapezoids, ellipses and parallelograms. Shows formula and step-by-step working
🔬 Maths & ScienceVolume Calculator
Calculate the volume of common 3D shapes including cube, sphere, cylinder, cone and pyramid with results in cubic cm, m and litres
🔬 Maths & SciencePythagorean Theorem Calculator
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
🔬 Maths & ScienceNumber
3Number to Words Converter
Convert any number to written English words. Supports negatives, decimals, and numbers up to quadrillions. Toggle between UK and US English formats.
🔬 Maths & ScienceRandom Number Generator
Generate random numbers, roll dice, flip coins and pick random colours. Bulk generation with configurable ranges and duplicate control
🔬 Maths & SciencePrime Number Checker
Check if a number is prime, see its factors if composite, and find the next 10 prime numbers with list primes up to N
🔬 Maths & ScienceVolume
2Cubic Feet Calculator
Calculate volume in cubic feet from length, width and height. Supports feet, inches, cm, metres and yards with conversions to litres, gallons and more
🔬 Maths & ScienceVolume Calculator
Calculate the volume of common 3D shapes including cube, sphere, cylinder, cone and pyramid with results in cubic cm, m and litres
🔬 Maths & ScienceShapes
2Area Calculator
Calculate the area of rectangles, circles, triangles, trapezoids, ellipses and parallelograms. Shows formula and step-by-step working
🔬 Maths & ScienceVolume Calculator
Calculate the volume of common 3D shapes including cube, sphere, cylinder, cone and pyramid with results in cubic cm, m and litres
🔬 Maths & ScienceArithmetic
2Fraction Calculator
Add, subtract, multiply and divide fractions with step-by-step working. Shows results as improper fraction, mixed number and decimal
🔬 Maths & ScienceMixed Numbers Calculator
Add, subtract, multiply and divide mixed numbers and fractions. Convert between mixed numbers, improper fractions and decimals with step-by-step working
🔬 Maths & ScienceStatistics
2Probability Calculator
Calculate probability, combinations (nCr), permutations (nPr) and independent events with formulas and step-by-step working
🔬 Maths & ScienceStandard Deviation Calculator
Calculate mean, median, mode, variance and standard deviation for any dataset. Shows step-by-step working and visual distribution
🔬 Maths & ScienceIncrease
2Percent Change Calculator
Calculate the percentage change between two values. Shows increase or decrease with colour coding, absolute change and the formula used
🔬 Maths & SciencePercentage Increase Calculator
Calculate a value after a percentage increase, or find what percentage increase goes from one value to another. Two-way calculation with formula
🔬 Maths & ScienceDecrease
2Percent Change Calculator
Calculate the percentage change between two values. Shows increase or decrease with colour coding, absolute change and the formula used
🔬 Maths & SciencePercentage Decrease Calculator
Calculate a value after a percentage decrease, or find what percentage decrease goes from one value to another. Two-way calculation with formula
🔬 Maths & ScienceMultiplication
2Maths Worksheet Generator
Generate printable maths worksheets with addition, subtraction, multiplication, and division. Set difficulty, number range, and question count. Includes answer keys.
📚 EducationTimes Tables Practice
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.
📚 EducationFactors
2Greatest Common Factor Calculator
Find the GCF and LCM of two or more numbers with prime factorisation and step-by-step Euclidean algorithm working
🔬 Maths & SciencePrime Number Checker
Check if a number is prime, see its factors if composite, and find the next 10 prime numbers with list primes up to N
🔬 Maths & ScienceOther
3Quadratic Equation Solver
Solve quadratic equations with step-by-step working showing discriminant calculation and real or complex roots
🔬 Maths & ScienceScreen Size Calculator
Calculate the actual width and height of a screen from its diagonal size and aspect ratio. Useful when buying monitors, TVs, or tablets.
🔬 Maths & ScienceTrigonometry Calculator
Calculate sin, cos, tan, csc, sec and cot for any angle in degrees or radians with visual unit circle indicator
🔬 Maths & Science