Mathematics calculators
Useful mathematics for everyday calculations, science, technical studies and engineering: percentages, proportions, numbers, algebra, geometry, vectors, matrices and statistics.
Numbers & everyday maths
- Percentage calculatorAnswer the common percentage questions directly: percent of a value, percentage represented by a part, original total, or increase and decrease.
- Proportion calculatorChoose A, B, C or D as the unknown, then enter the three known values. The diagram substitutes your numbers directly into the two fractions.
- Fraction calculatorEnter two integer fractions, choose an operation and get the reduced exact fraction together with its decimal value.
- Scientific notationConvert a finite decimal number to scientific notation, or reconstruct the decimal value from a coefficient and base-10 exponent.
- Significant figuresEnter the number as written so trailing decimal zeros are preserved, then choose how many significant figures to keep.
Algebra
Geometry
- Volume calculatorChoose a common 3D shape, enter its dimensions in one consistent length unit and calculate the enclosed volume.
- Triangle solverSolve a triangle from SSS, SAS, ASA or AAS data. Find all sides and angles, area and perimeter; detect impossible triangles.
- Coordinate geometry calculatorFind distance, midpoint, slope and line equation between two 2D points, with explicit vertical-line and identical-point states.
- Circle calculatorStart from radius, diameter, circumference or area and calculate the other circle quantities on one page.
- Regular polygon calculatorCalculate area, perimeter, apothem, circumradius and angles from side count and side length of a regular polygon.
Vectors & matrices
- Vector calculatorCalculate norms, vector sums, differences, scalar products kA and unit vectors in 2D or 3D.
- Dot product and angle between vectors calculatorFind the dot product, vector norms, cosine and angle between two 2D or 3D vectors.
- Cross product calculatorCalculate A×B, its norm and the areas of the associated parallelogram and triangle from two 3D vectors.
- Matrix calculatorCalculate determinants, inverses, sums, differences and products of 2×2 or 3×3 matrices with structured matrix results.