Best Free Online Scientific Calculator in 2026 (Google, Desmos and More)
Need a free online scientific calculator right now? You do not have to dig out an old Casio. For more than a decade Google has shown a full scientific calculator right in search results, and today several free web calculators go even further with graphs, fractions and step-by-step answers. Here are the best free online scientific calculator options in 2026, and how to use them.
Quick answer: Type “calculator” into Google to open a free scientific calculator with trigonometry, logs, powers and roots. For school and exams, Desmos Scientific is clean and ad-free. GeoGebra and Desmos Graphing draw graphs, and Wolfram Alpha solves equations with step-by-step answers. Windows, Mac, iPhone and Android all have a scientific mode built in too.
Table of Contents
1. Google’s online scientific calculator
Search calculator (external site) or type any sum, such as sin(30) * 2^5, into Google. The calculator supports:
- Trigonometry (sin, cos, tan) in degrees or radians
- Logarithms (log, ln), powers, roots and factorials
- Pi, e, percentages and the Ans key
- Unit conversions, such as “5 miles in km”
It works on desktop and mobile, and you can even use voice search. More hidden Google tricks: try Google Gravity, or learn to search Google the better way.
2. Desmos Scientific Calculator
Desmos Scientific (external site) is free, ad-free and approved for many school and state exams. It shows fractions properly, keeps a history of calculations and works great on tablets.
3. Graphing calculators
- Desmos Graphing (external site): type an equation and see the graph instantly, with sliders for variables.
- GeoGebra (external site): graphing, geometry, 3D and CAS (algebra) tools in one free app.
4. Wolfram Alpha
Wolfram Alpha (external site) answers maths questions in plain English, such as “solve x^2 – 5x + 6 = 0”, and shows step-by-step solutions with a Pro subscription.
5. Built-in scientific calculators
- Windows: open Calculator and choose Scientific from the menu.
- Mac: open Calculator and press Cmd + 2 for Scientific.
- iPhone: in the Calculator app, tap the calculator icon to switch to Scientific, or turn the phone sideways.
- Android: open Calculator and tap the expand arrow or rotate the phone.
Tips for accurate answers
- Check whether you are in degrees (Deg) or radians (Rad) before trigonometry.
- Use brackets to control the order of operations.
- For exams, check which calculators are allowed; many accept Desmos.
FAQ
Is Google’s calculator free?
Yes. It is built into Google search, with no app or sign-in needed.
Which online calculator is best for students?
Desmos Scientific for everyday maths and exams, and Desmos Graphing or GeoGebra for graphs.
Can an online calculator show working steps?
Wolfram Alpha and some AI assistants can show steps. Always check the method yourself.
Which calculator do you use most? Tell us in the comments.
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fantastic Calculator Awesome :) excellent work google thanks sharing this post keep it up
Google will Always Give nice things to all peoples.But this really to all students.While they are in online they are easy to use this Google calculator.Thanks for this peculiar calculator.
very nice Calculator Awesome :) good work google thanks sharing this post keep it up