The best free graphing calculators in 2026
There has never been more good, free graphing software. The right choice depends less on which is “best” than on what you need it for: an exam, a geometry lesson, a calculus assignment or a research paper. Here is a fair look at five, including our own, ihateDesmos, which we have tried not to favour.
Disclosure: we make ihateDesmos. Every claim about the other tools was checked against their own documentation on 20 October 2026, and we have linked our detailed comparisons where they exist.
What we looked for
- Graphing range: functions, equations, inequalities, polar and parametric curves, 3D.
- Mathematics beyond the graph: algebra, calculus, statistics, differential equations.
- Accuracy and honesty: how it handles asymptotes, exact values and numerical error.
- Practicalities: cost, accounts, offline use, exports and exam acceptance.
Desmos: the classroom standard
Desmos made fast, beautiful, free graphing the norm. Its graphing calculator is quick to learn, supports sliders, tables, lists, regressions, a complex-number mode and image export, and there is a separate 3D calculator, a scientific calculator, a matrix calculator and a geometry tool. Its biggest practical advantage is that the digital SAT and many state tests build Desmos into the exam, so practising with it means no surprises on the day.
Best for: school maths, exam practice, and classroom activities through Desmos Classroom (now part of Amplify). Less suited to: symbolic algebra, which it does not do. See ihateDesmos vs Desmos.
GeoGebra: the everything platform
GeoGebra is an extraordinary free project: graphing, dynamic geometry, a computer algebra system, 3D with STL export for printing, probability and a spreadsheet, plus hundreds of thousands of shared teaching materials. Its geometry constructions, which stay connected as you drag them, are unmatched.
Best for: geometry, teachers who want ready-made applets, and courses built around it. Less suited to: people who want one simple interface; its breadth means many apps and views to learn. See ihateDesmos vs GeoGebra.
ihateDesmos: graphs with the maths attached
ihateDesmos is a calculator-first tool that puts a computer algebra system, statistics, differential equations and complex functions in the same expression list as the graph. It reports error estimates on integrals, refines roots to about twelve digits, uses interval arithmetic to draw curves that sampling plotters can miss, and exports SVG, PDF, TikZ, STL, OBJ, GIF and video. Notebooks combine prose and live graphs. It is free, needs no account and works offline after one visit.
Best for: university calculus and differential equations, statistics with error bars, and figures for reports and papers. Less suited to: exams (it is not an approved exam calculator) and geometry constructions, which it does not do.
NumWorks: a real calculator in your browser
NumWorks makes a physical graphing calculator popular in European schools, and offers a free online simulator of it. It behaves exactly like the handheld, including its Python app, which makes it the best choice if you will be using a NumWorks in class or in an exam that allows it.
Best for: students who own or will use a NumWorks calculator. Less suited to: large screens and complex graphs, since it reproduces a small calculator display.
Wolfram|Alpha: the answer engine
Wolfram|Alpha is not a graphing calculator in the usual sense: you ask a question, in maths or plain English, and it computes an answer, often with plots. Built on Mathematica, it solves far harder symbolic problems than any of the others and draws on a vast store of curated data. Step-by-step solutions are limited for free users and unlimited with a paid Pro subscription.
Best for: one-off hard problems and checking answers. Less suited to: exploring a graph interactively. See ihateDesmos vs Wolfram|Alpha.
At a glance
| Desmos | GeoGebra | ihateDesmos | NumWorks | Wolfram|Alpha | |
|---|---|---|---|---|---|
| Free | Yes | Yes | Yes | Yes (simulator) | Yes, with paid Pro |
| 3D graphing | Yes | Yes | Yes | No | Plots on request |
| Symbolic algebra | No | Yes | Yes | Not built in | Yes, the strongest |
| Slope fields | Via templates | Yes | Yes | Not documented | Yes |
| Geometry constructions | Yes | Yes | No | No | No |
| Built into major exams | Yes (SAT, ACT, many state tests) | Varies by country | No | Varies (the handheld) | No |
Which should you use?
- Preparing for the SAT, ACT or a state test: Desmos, because it is what you will see on the day.
- Learning geometry, or your teacher uses GeoGebra: GeoGebra.
- Calculus, differential equations or statistics at university: ihateDesmos or GeoGebra, with Wolfram|Alpha to check hard algebra.
- Making figures for a report or paper: ihateDesmos (SVG, PDF and TikZ export) or GeoGebra.
- Using a NumWorks in class: the NumWorks simulator.
All five are free to try, so the best test is the graph you actually need to draw.