Free maths help for school and home
Maths answers that actually make sense
SolvCalc is a free scientific calculator with eight maths solvers that show their working, so you can learn the method as well as get the answer.
Open the calculator Browse all calculators
- No sign-up or download
- Shows every step
- Works on Chromebooks and phones
Free online scientific calculator
Trig, logs, roots, powers and brackets. Tap the keys or use your keyboard: digits, + - * /, Enter for equals, Backspace to delete, Esc to clear.
Eight maths calculators that show their working
Pick the one that matches your question. Each page explains the method, gives a worked example and answers the usual questions.
Why we built SolvCalc
Most online calculators hand you a number and leave you to wonder whether it is right. That is fine for a quick sum, but it is not much use when you are trying to learn how to do something, or when you need to explain your answer to a teacher. SolvCalc was built around a simple idea: the working matters as much as the result.
So when you add two fractions here, you see the common denominator being found. When you solve a quadratic, you see the discriminant, then the formula, then the answer. If your own working on paper gives a different result, you can compare line by line and spot the slip in seconds.
It is free, it has no sign-up, and it is designed to be the tab you keep open next to your homework.
What is SolvCalc good for?
People arrive with all sorts of questions. Here is a quick map of where to go.
| If you are working on... | Start here | Why it helps |
|---|---|---|
| Fractions and mixed numbers | Fraction calculator | Finds the common denominator and simplifies for you |
| Sale prices, tax, grade percentages | Percentage calculator | Four common percentage questions in one place |
| Algebra and parabolas | Quadratic solver | Shows discriminant, roots and vertex |
| Data and statistics | Averages calculator | Mean, median, mode, range and spread together |
| Geometry | Area and perimeter | Five shapes with the formula written out |
| Triangles | Pythagoras calculator | Finds the missing side and the angles |
Not sure which one you need? Browse the full list of calculators or read one of our study guides.
Getting the most from the scientific calculator
The calculator above follows the standard order of operations, often remembered as BODMAS or PEMDAS: brackets first, then powers and roots, then multiplication and division, then addition and subtraction. A few habits make a big difference.
- Use brackets generously. Typing (3 + 5) × 2 gives 16, but 3 + 5 × 2 gives 13. If a question has a fraction line, put the top and the bottom in brackets.
- Check the angle mode. The trig keys work in degrees, which is what most school questions expect. If you are given radians, convert first.
- Use the shift hints. The small labels above each key show the second function, such as sin⁻¹ above sin.
- Replay instead of retyping. If you spot a typo in a long expression, press Replay, fix the one part that is wrong and run it again.
- Estimate first. If 49 × 51 should be close to 50 × 50, you expect about 2,500. An answer of 25,000 means a key slipped.
For parents and teachers
If you are helping a child with homework, the working shown beneath each result is the useful bit. Ask them to explain each line in their own words before you reveal the next. If they can, they understand it; if they cannot, you have found exactly where to help.
Teachers are welcome to use the calculators in lessons and to link to individual pages from class notes. Everything runs in the browser with no account, so there is nothing for students to install or sign up for, and nothing they type is sent to us.
How to use SolvCalc in three steps
No account, no setup. Just open a page and go.
Pick the right tool
Use the scientific calculator for quick sums, or choose a specialist calculator for fractions, percentages, equations and more.
Enter your numbers
Type them in, check the labels, and press Calculate. The calculator tells you straight away if something does not make sense.
Read the working
Compare each step with your own method. Where they differ is where to look again.
From the study guides
Plain-English explanations with worked examples. No jargon walls.
Frequently asked questions
Is SolvCalc really free?
Yes. Every calculator and guide is free to use, with no account, no download and no limit on how many sums you run.
Does the scientific calculator work in degrees or radians?
Degrees. The sin, cos and tan keys expect degrees and their inverses return degrees, which matches most school questions. If your question uses radians, convert by multiplying by 180 and dividing by pi.
Can I use SolvCalc on a school Chromebook or a phone?
Yes. It runs in any modern browser, so it works on Chromebooks, laptops, tablets and phones without installing anything.
Will SolvCalc do my homework for me?
It will check it, and show you how the answer is reached. We would rather you understand the method, because that is what stays with you in the exam.
What is the difference between a calc solver and a normal calculator?
A normal calculator gives a number. A calc solver, which is how many people describe tools like SolvCalc, also shows the steps and explains the method, so you can learn from it.
Do you store the numbers I enter?
No. All the calculations happen in your browser. Nothing you type into a calculator is sent to our servers.