Twenty-one calculators · instant results · no sign-in
Every number, worked out.
Type a value and the answer updates as you go — with the working shown underneath, so you can check it rather than trust it.
Math
11Scientific calculator
Full keypad with powers, roots, logs and trigonometry.
Basic calculator
Add, subtract, multiply and divide with large keys.
Graphing calculator
Interactive function plots with sliders, zoom and image export.
3D graphing calculator
Explore live 3D surfaces, points, and animated variables.
Matrix calculator
Add, subtract, multiply, transpose, determinant and inverse up to 5×5.
Math notebook
A calculation per line, each with its own answer and a running sum.
Dynamic geometry
Construct points, lines, circles and polygons with live dependencies and measurements.
Geometry calculator
Area, perimeter and diagonals of flat shapes.
3D solid calculator
Volume and surface area of solids, with a live 3D model.
Quadratic equation solver
Solve ax² + bx + c = 0 with discriminant and roots.
Percentage calculator
Percent of a number, share of a total, and percent change.
Convert
04Finance
05Loan payment calculator
Monthly instalment, total interest and total repaid.
VAT and sales tax calculator
Add tax to a net price or strip it from a gross one.
Zakat calculator
2.5% of zakatable wealth, checked against the nisab.
Tip and bill split calculator
Tip amount, total bill and the share per person.
Compound interest calculator
Future value of savings with periodic compounding.