Maths & Conversion Calculators
Solve maths problems faster than you can type them into a search bar. Percentages, fractions, averages, exponents, quadratic equations, standard deviation — each calculator shows the formula, the working, and the result. Built for students, teachers, and anyone who needs a quick answer they can trust.
Most popular
Calculate percentages easily — find what percent of a number is, percentage chan...
Fraction CalculatorAdd, subtract, multiply, and divide fractions. Simplifies results to the lowest ...
Area CalculatorCalculate the area of common shapes — rectangle, circle, triangle, trapezium, an...
Percentage Calculator
Calculate percentages easily — find what percent of a number is, percentage change, and more.
Fraction Calculator
Add, subtract, multiply, and divide fractions. Simplifies results to the lowest terms automatically.
Area Calculator
Calculate the area of common shapes — rectangle, circle, triangle, trapezium, and more.
Average Calculator
Calculate the mean, median, mode, and range from any set of numbers. Enter your data and get all four measures of central tendency instantly.
Ratio Calculator
Solve proportions and find the missing value in A:B = C:D. Simplify ratios, scale recipes, convert map distances, and work with any proportional relationship.
Quadratic Equation Solver
Solve any quadratic equation ax² + bx + c = 0. Get both roots, the discriminant, vertex coordinates, and axis of symmetry with full working shown.
Exponent Calculator
Calculate any power or root. Enter a base and exponent to compute bⁿ, including negative exponents, fractional exponents (roots), and zero power.
LCM & HCF Calculator
Find the Least Common Multiple (LCM) and Highest Common Factor (HCF/GCD) of two or more numbers. Uses prime factorisation and the Euclidean algorithm with step-by-step working.
Roman Numeral Converter
Convert between Roman numerals and standard (Arabic) numbers. Enter a Roman numeral like XIV or a number like 2024 and get the conversion instantly with the breakdown explained.
Scientific Notation Converter
Convert between standard notation and scientific notation. Enter any number and get it expressed as a × 10ⁿ, or enter scientific notation to see the full number.
Prime Number Calculator
Check if a number is prime, find its complete prime factorisation, and list all prime numbers up to a given limit. Uses trial division and the Sieve of Eratosthenes.
Scientific Calculator
Free online scientific calculator with trigonometry, logarithms, exponents, factorials, and constants.
Mean, Median & Mode Calculator
Calculate the mean, median, mode, range, sum, and count from any list of numbers.
Standard Deviation Calculator
Calculate the standard deviation, variance, and mean from any list of numbers. Shows both population and sample standard deviation.
Fraction to Decimal Calculator
Convert fractions to decimals and decimals to fractions instantly. Shows simplified fractions, percentages, and whether the decimal terminates or recurs.
Place Value Calculator
Enter any number and see each digit's place value — ones, tens, hundreds, thousands, and beyond. Works with decimals too.
Frequently Asked Questions
Do these calculators show the working?
Yes. Most maths calculators show step-by-step working so you can understand how the answer was reached — useful for homework, revision, and checking your own calculations.
Can I use these for my coursework?
You can use them to check your work and understand methods. Always show your own working in coursework submissions — these tools are for verification and learning, not copying.
What's the difference between the Average Calculator and the Mean, Median & Mode Calculator?
The Average Calculator gives you all four measures (mean, median, mode, range) in one go. The Mean, Median & Mode Calculator provides more detailed step-by-step breakdowns of each calculation.
What Can You Calculate?
The Percentage Calculator calculate percentages easily — find what percent of a number is, percentage change, and more.
The Fraction Calculator add, subtract, multiply, and divide fractions. Simplifies results to the lowest terms automatically.
The Area Calculator calculate the area of common shapes — rectangle, circle, triangle, trapezium, and more.
The Average Calculator calculate the mean, median, mode, and range from any set of numbers. Enter your data and get all four measures of central tendency instantly.
The Ratio Calculator solve proportions and find the missing value in A:B = C:D. Simplify ratios, scale recipes, convert map distances, and work with any proportional relationship.
The Quadratic Equation Solver solve any quadratic equation ax² + bx + c = 0. Get both roots, the discriminant, vertex coordinates, and axis of symmetry with full working shown.
The Exponent Calculator calculate any power or root. Enter a base and exponent to compute bⁿ, including negative exponents, fractional exponents (roots), and zero power.
The LCM & HCF Calculator find the Least Common Multiple (LCM) and Highest Common Factor (HCF/GCD) of two or more numbers. Uses prime factorisation and the Euclidean algorithm with step-by-step working.
The Roman Numeral Converter convert between Roman numerals and standard (Arabic) numbers. Enter a Roman numeral like XIV or a number like 2024 and get the conversion instantly with the breakdown explained.
The Scientific Notation Converter convert between standard notation and scientific notation. Enter any number and get it expressed as a × 10ⁿ, or enter scientific notation to see the full number.
The Prime Number Calculator check if a number is prime, find its complete prime factorisation, and list all prime numbers up to a given limit. Uses trial division and the Sieve of Eratosthenes.
The Scientific Calculator free online scientific calculator with trigonometry, logarithms, exponents, factorials, and constants.
The Mean, Median & Mode Calculator calculate the mean, median, mode, range, sum, and count from any list of numbers.
The Standard Deviation Calculator calculate the standard deviation, variance, and mean from any list of numbers. Shows both population and sample standard deviation.
The Fraction to Decimal Calculator convert fractions to decimals and decimals to fractions instantly. Shows simplified fractions, percentages, and whether the decimal terminates or recurs.
The Place Value Calculator enter any number and see each digit's place value — ones, tens, hundreds, thousands, and beyond. Works with decimals too.
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