The tool

Votre calculatrice en ligne

Click a key or type freely. The result updates as you write.

Online Calculator

Online Productivité, Bureautique & Documents

Sign in

Angle Decimals Auto hist.

Quick keys: Ans last result · \% percentage · // comment · gcd(12,18) · sqrt(8) · sin(30°) · hex(255) · bin8(5) · conv(5,'km','mi') · conv(20,'°C','°F') · def("a", 12) · f(x)=x^2 · integ(sin(x),0,pi) · deriv(x^3,x) · solve(x^2-4=0) · det([[1,2],[3,4]]) · moy(1,2,3,4) · combi(10,3) · shortcuts: Enter=result · Ctrl+K=palette. 100% local, nothing leaves your device.

0,0 0Like 0Comment All tools

Free or Premium?

The calculator is free and unlimited: no account, nothing to install. Premium unlocks the whole Volade ecosystem.

FreeAll calculation functions: expressions, trigonometry, fractions, matrices

FreeHistory and variables persist locally

FreeFunction graphs, unit conversion, number bases

PremiumCloud backup and multi-device synchronisation

PremiumReusable libraries and shared custom functions

Unlock Premium

Features

A complete calculator, from school to research

From addition to parametric curves, everything is brought together in a single unified calculation engine.

Full expressions

Operator precedence, nested parentheses, powers, roots, factorials, percentages and scientific notation power the engine. The exact result (fraction, radical) is displayed alongside the decimal value and the approximation.

Try an expression

Extended engine

Fractions, matrices, vectors, complex numbers, probability, statistics, number bases, congruences and number theory: everything combines freely in a single expression.

Discover the functions

Total privacy

No calculation, no input and no history ever leaves your device: the engine runs entirely in the browser, even offline, with a Web Worker for heavy computations.

Learn more

How it works

Calculate in three steps

No installation, no sign-up: just a calculation engine ready to use.

Type

Type freely (2+3×4, sqrt(2), sin(30°)) or use the calculator keys. Syntax highlighting and autocomplete guide you.

Get the result

The calculation updates in real time: exact value, configurable decimal and approximation — all shown simultaneously.

Reuse

The full history is kept locally: reuse the last result (Ans), pin your favourite calculations, define variables and share an expression by URL.

Specialised modes

Standard, scientific, advanced and more

Switch keyboards on the fly: each mode offers the right keys and functions.

Standard mode

The four operations, percentages, roots, memory and pinned results — ideal for everyday life, bills and VAT.

Scientific mode

Trigonometry in DEG/RAD/GRAD, logarithms, exponentials, factorials, constants π, e, φ — perfect for science and high school.

Advanced mode

Symbolic calculation, equations, integrals and derivatives, limits, sequences, matrices, vectors and function graphs right in the tool window.

All the calculator functions

Arithmetic, algebra and numbers

The basics: addition, subtraction, multiplication, division, modulo, percentages (relative, increase, decrease), powers, square/cube/nth roots, fractional exponents, inverse, absolute value, opposite, factorial, double factorial, subfactorial, rounding, floor, ceiling, truncation, integer and fractional parts, GCD, LCM, primality test, prime factorisation, sum/product of numbers, arithmetic/geometric/harmonic means, median, mode, min/max, cumulative sums and products, comparisons. Large numbers are handled with arbitrary precision (BigInt) up to thousands of digits, with configurable decimal display and banker's rounding.

Fractions et nombres exacts

Fraction ↔ decimal conversion, automatic simplification, addition/subtraction/multiplication/division of fractions, mixed numbers ↔ improper fractions, comparison, GCD/LCM of fractions, continued fractions and step-by-step simplification display. The engine always provides the exact result (fraction or radical) alongside the approximate value.

Constantes et fonctions élémentaires

π, e, φ, √2, √3, √5 and custom constants; powers of 10 and 2 (positive, negative, fractional); ln, log, log₂ and custom bases; e^x, 10^x, 2^x. The imaginary constant i is available for complex calculation.

Complete trigonometry

Sine, cosine, tangent, cotangent, secant, cosecant and their inverses (arcsine, arccosine, arctangent, arccotangent, arcsecant, arccosecant), hyperbolic and inverse hyperbolic functions, degrees/radians/gradians conversion (all three angular units selectable), compound trigonometry and angle simplification.

Calcul symbolique et résolution

First- and second-degree equations, polynomial, exponential, logarithmic and trigonometric equations, with fractions and roots; systems of two and three equations and linear systems; inequalities; symbolic solving with automatic solution search, exact and approximate display, automatic verification. Expansion, factorisation, simplification, expression reduction, polynomial expansion, collecting like terms and variable substitution. First/second/nth/partial/directional, implicit and logarithmic derivatives; indefinite, definite, double, triple, numerical and symbolic integrals; left, right and infinite limits; Taylor and Maclaurin series, series sums and products; arithmetic, geometric and recurrent sequences with general term, sum and limit.

Matrices, vecteurs et nombres complexes

Matrix creation [[a,b],[c,d]], addition, subtraction, multiplication, scalar product, transpose, determinant, trace, inverse, identity and zero matrices, rank, row echelon form, reduction, eigenvalues and eigenvectors, decomposition and solving systems with matrices. Free vectors [x,y,z]: sum, difference, scalar and cross product, norm, angle and projection, cartesian ↔ polar conversion. Complex numbers: real and imaginary parts, modulus, argument, conjugate, cartesian/polar/exponential forms, all operations, powers, roots, complex matrices.

Probability and statistics

Permutations, arrangements, combinations, binomial coefficients, binomial probability, binomial, normal, Poisson, exponential and uniform distributions; expectation, variance, standard deviation, covariance, correlation, descriptive statistics, linear and polynomial regression, interpolation, z-score, percentile, quartiles.

Bases numériques et arithmétique modulaire

Decimal ↔ binary/hexadecimal/octal conversion and all bases from 2 to 36, bitwise operations (AND, OR, XOR, NOT, left/right shifts, two's complement), modulo n arithmetic, congruences, number theory: integer factorisation, Euler's totient function, Möbius function, divisors, number and sum of divisors, extended GCD, Euclid's algorithm, Ackermann function.

Units et grandeur

Built-in conversion: length, mass, time, area, volume, speed, acceleration, force, energy, power, pressure, temperature, angle, frequency, charge, voltage, current, resistance, capacitance, inductance. Units appear directly in expressions, with compatibility checking, automatic conversion and simplification, compound unit calculation and dimensional analysis.

Graphs and geometry

y=f(x) graphing, multiple, parametric, polar, implicit functions, sequences, derivative, integral; zoom, pan, configurable grid and axes, automatic scaling, root/intersection/extremum finding, tangent, animatable cursors, 3D surfaces with rotation and slices, table of values, custom colours, hover coordinates and graph export.

Geometry: points, distance, midpoint, lines, slope, intersections, circles, triangles (Pythagoras, equilateral, isosceles, scalene, law of sines and cosines), quadrilaterals, regular polygons, ellipses, volumes and areas of common solids, coordinate calculator and analytic geometry, with step-by-step and formula display for each result.

Erreurs, précision et interface

Automatic detection: unbalanced parentheses, invalid syntax, division by zero, invalid root or logarithm, undefined result, numerical overflow. Handling of very large and very small numbers, arbitrary precision, banker's and scientific rounding, exact comparison. Numeric/scientific/mathematical keyboard and keyboard shortcuts, drag and drop, autocomplete, function and constant suggestions, syntax highlighting, coloured parentheses, automatic formatting, MathML and LaTeX display, natural input, import/export, full-screen mode, dark/light themes, high contrast, screen reader support, multilingual interface, configurable decimal separator.

Privacy, PWA and integration

100% browser-side calculations, offline operation, installable PWA, history and favourites stored locally, no account required, no data sent to any server, local import/export and backup/restore, sharing an expression or result by URL, printing, PDF, image, LaTeX and MathML export, local JavaScript API, Web Worker for heavy calculations, extensible engine, reusable custom functions, persistent variables, workspaces, tabs and result comparison, details, variables, functions, graph and history panels, command palette (Ctrl+K), built-in documentation, examples per function, domains of definition, symbolic and numerical verification (double computation), and automated tests of the math engine.

FAQ

Frequently asked questions about the calculator

Everything you want to know before getting started.

How do I type an expression with parentheses?

Just write as you would on paper: (2+3)×(4−1) or (a+b)^2. Operator precedence is respected and parentheses can be nested freely. If you forget a parenthesis, the tool flags the error and offers to fix it.

Why do I see “exact” and “decimal” at the same time?

The engine calculates symbolically whenever possible: 4/6 gives 2/3, sqrt(2) stays √2, sin(30°) gives 1/2. The decimal value and the approximation are displayed alongside. You control the number of decimals.

How do I retrieve a previous result?

History is kept locally even after you close the tab. Click a calculation to reload it, use the Ans variable to resume the last result, pin your favourites, search through history or duplicate a calculation to edit it.

Can I define my own variables and functions?

Yes. Type def("a", 12) for a variable, f(x)=x^2 for a function, then use them anywhere: 2*a+f(3). Variables persist locally and can be reused across calculations, tabs and sessions.

Does the calculator work offline?

Yes. Everything happens in your browser: no connection is needed and you can install the calculator as an app (PWA). Your data stays on your device and nothing is sent to a server.

Which angle units are supported?

All three: degrees (DEG), radians (RAD) and gradians (GRAD), selectable in the options bar. You can also write sin(30°): the ° symbol forces degrees, while rad(π/2) converts explicitly.

How do I plot a function's graph?

Switch to “Advanced” mode then use the graph panel: enter f(x)=sin(x) or x^2, plot, zoom with the wheel and drag to pan. Two functions can be overlaid and you can locate roots, intersections, maxima and minima.

Is it really free with no sign-up?

Yes, unlimited and no account needed. The calculator is a free offering of the Volade ecosystem. Premium is only there to unlock the full set of tools (browser, CMS, desktop, mobile, scripts and API) and cloud sync.

How do I share a calculation?

Copy the expression (Ctrl+C) or share it by URL: the ?q= parameter preloads the expression for your recipient. You can also export history as JSON, print the result or export it as PDF, image, LaTeX or MathML.

Can I solve equations like x²−4 = 0?

Yes: solve(x^2-4=0) returns the exact solutions {-2 ; 2} and their approximations. The solver handles polynomial, exponential, logarithmic and trigonometric equations, as well as linear systems with up to three unknowns, with automatic verification.

How do I convert units?

Use conv(value, 'unit1', 'unit2'): for example conv(5,'km','mi'), conv(20,'°C','°F') or conv(1,'h','s'). Dimensions are checked automatically and the tool suggests compatible units (length, mass, time, area, volume, speed, force, energy, power, pressure, temperature, angle, frequency, electricity and more).

What does “BigInt” / high precision mean?

It's the arbitrary precision engine for integers: factorisation, primality, large powers and factorials run without any loss of precision, even on numbers several thousand digits long. Floating-point (decimal) calculation remains handled separately with your decimal setting.

100% local calculator: your data never leaves your computer

Unlike classic online calculators, no calculation is ever transmitted: the math engine runs in your browser, with a Web Worker for heavy operations without freezing the interface. You can then use it on sensitive data (notes, quotes, salaries) with complete peace of mind, even in airplane mode.

History, variables, favourites and settings are stored locally (localStorage) and exportable: backup, restore, UTF-8 zipped JSON import/export. The Volade Premium licence adds optional cloud sync that is encrypted, self-contained and independent of the tool.

Recommended for

Students and high-schoolers (trigonometry, fractions, equations, statistics), professionals (units, percentages, engineering notation, VAT), developers (bases 2/8/16/36, bitwise, JavaScript API), teachers (steps, table of values, LaTeX/MathML export) and anyone who wants a free and private online calculator.

One premium licence, all your web tools

Calculator, conversions, generators, PDF editors and 19+ free tools — and the entire Volade ecosystem with a single licence.

Go premium See the tools