33 focused tools
A broad collection covering arithmetic, algebra, geometry, statistics, finance, number theory, conversions, and advanced functions.
33 interactive calculators
Mathematical Tools
Choose a focused calculator for everyday arithmetic, school mathematics, geometry, statistics, finance, conversions, or advanced formulas. Every tool includes validation, a formula explanation, a worked example, and a detailed result.
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Search by name, purpose, or category, then open a tool to calculate with realistic examples and formula guidance.
Showing 33 toolsAll calculations run in your browser.
Basic Calculator
Perform addition, subtraction, multiplication, division, remainder, and power calculations with a clear calculation trail.
Scientific Calculator
Calculate trigonometric values, inverse functions, logarithms, roots, exponentials, and absolute values in one focused calculator.
Advanced Area Calculator
Calculate the area of rectangles, squares, circles, triangles, parallelograms, trapezoids, ellipses, and regular polygons.
Logarithm & Exponential Calculator
Calculate common logs, natural logs, custom-base logarithms, antilogarithms, exponentials, and general powers with domain checks.
Percentage Calculator
Solve percentage-of, what-percent, percentage change, increase or decrease, and percentage difference problems with the appropriate formula.
Trigonometric Calculator
Calculate sine, cosine, tangent, reciprocal functions, and inverse trigonometric values in degrees or radians.
Unit Calculator
Convert length, mass, temperature, area, volume, speed, and time using category-aware units and transparent conversion factors.
Volume & Surface Area Calculator
Calculate volume and total surface area for cubes, rectangular prisms, spheres, cylinders, cones, pyramids, hemispheres, and ellipsoids.
Fraction Calculator
Add, subtract, multiply, or divide two fractions and receive a simplified fraction, decimal value, and mixed-number form.
Ratio & Proportion Calculator
Simplify a two-part ratio and solve a missing fourth value in an equivalent proportion.
Average, Median & Mode Calculator
Analyse a dataset to find count, sum, arithmetic mean, median, mode, minimum, maximum, and range.
Prime Number Checker
Determine whether a non-negative integer is prime and inspect its positive factors.
Factors & Multiples Calculator
List every positive factor of a whole number and generate its first several positive multiples.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of two non-zero integers.
Linear Equation Solver
Solve a one-variable linear equation in the form ax + b = 0 and verify the solution by substitution.
Quadratic Equation Solver
Solve ax² + bx + c = 0, classify the discriminant, and return real or complex roots.
Simultaneous Equations Solver
Solve two linear equations in two unknowns using determinants and check both equations.
Power & Root Calculator
Calculate a base raised to an exponent and an nth root, including valid odd roots of negative numbers.
Factorial, Permutation & Combination Calculator
Calculate n factorial, ordered arrangements nPr, and unordered selections nCr for whole-number inputs.
Sequence & Series Calculator
Find the nth term, sum, and opening terms of an arithmetic or geometric sequence.
Standard Deviation Calculator
Calculate mean, population variance and standard deviation, plus sample variance and standard deviation for a numeric dataset.
Probability Calculator
Calculate an event probability, percentage, complement, and odds from favorable and total equally likely outcomes.
Simple Interest Calculator
Calculate simple interest, final amount, annual interest, and effective return from principal, yearly rate, and time.
Compound Interest Calculator
Estimate compound growth, interest earned, periodic rate, and effective annual rate from principal, rate, time, and frequency.
Loan EMI Calculator
Estimate a fixed monthly loan payment, total repayment, total interest, and first-month interest from principal, rate, and tenure.
Discount & Tax Calculator
Calculate discount savings, price after discount, tax on the discounted price, and final payable amount.
Profit Margin Calculator
Calculate gross profit, profit margin on revenue, markup on cost, and break-even relationship from cost and selling price.
Speed, Distance & Time Calculator
Enter any two of speed, distance, and time to calculate the missing value and verify the relationship.
Pythagorean Theorem Calculator
Find the missing side of a right triangle from the other two sides and check whether the hypotenuse is valid.
Coordinate Geometry Calculator
Find distance, midpoint, slope, direction angle, and line equation from two Cartesian coordinate points.
Circle Calculator
Calculate diameter, circumference, area, semicircle area, and arc-related reference values from a radius.
Triangle Calculator
Use three side lengths to validate a triangle and calculate perimeter, semiperimeter, area, angles, and triangle type.
2×2 Matrix Calculator
Calculate determinant, trace, inverse, eigenvalues, and basic classification for a 2×2 matrix.
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Designed for useful answers
More than a blank calculator
Each page explains the formula, validates unrealistic inputs, provides a worked example, and presents related values alongside the main answer.
Real input validation
Tools check zero denominators, invalid triangle sides, logarithm domains, percentage baselines, loan terms, and other important edge cases.
Useful result details
See supporting values such as totals, percentages, formulas, root types, verification checks, and converted base units.