Free online math calculators with clear, step-by-step answers
Calculate percentages, simplify fractions, solve algebra problems, find area and volume, and work with averages or finance. MathKit provides quick results, formulas, worked examples, and learning guides for students, teachers, and everyday calculations.
Popular Calculators
Free calculators for common maths questions.
Percentage Calculator
Calculate percentage of a value
Quadratic Equation Solver
Solve a·x² + b·x + c = 0 with the quadratic formula
Compound Interest Calculator
A = P × (1 + r/100)^t, compounded annually
Triangle Area Calculator
Area of a triangle from base and height
Fraction Calculator
Convert a fraction to its decimal value
Mean Calculator
Arithmetic mean of a data set
Date Difference Calculator
Days between two dates
Pythagorean Theorem Calculator
Hypotenuse of a right triangle
Explore Math Calculators by Category
Choose a topic to find the right calculator, formula, or worked example.
Basic Math
Addition, subtraction, multiplication, division and more.
Fractions & Decimals
Convert, compare, and calculate with fractions and decimals.
Percentages
Find percentages, increases, decreases, and discounts.
Geometry
Area, perimeter, volume, and surface area calculators.
Algebra
Solve equations, factor expressions, and simplify terms.
Statistics
Mean, median, mode, standard deviation, and probability.
Finance
Loan, interest, tax, and investment calculators.
Trigonometry
Sin, cos, tan, inverse functions, and right triangles.
Math Tables
Multiplication, addition, squares, cubes, factors, prime numbers and more — quick reference tables for practice and revision.
Browse tablesMath Practice
Timed quizzes, topic tests, and printable worksheets to practise concepts and check your understanding.
Start practicingMath Learning Guides
Plain-English guides to fractions, percentages, geometry, algebra, and statistics, with worked examples and related calculators.
Read guides