Math & Scientific
Algebra Calculator
Algebra — it rearranges the equation and isolates the variable, using the quadratic formula for degree-2 equations. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Want to work through a calculation? Algebra Calculator does it from your expression or equation and shows the result clearly, with everything calculated in your browser.
About this calculator
Get algebra right and the rest of the task gets easier. It rearranges the equation and isolates the variable, using the quadratic formula for degree-2 equations. It matters when you need the exact relationship checked quickly rather than worked through by hand. Expand and solve 3(x − 2) = 9: 3x − 6 = 9, 3x = 15, x = 5 . The tool above does the same computation in your browser — free, private, nothing stored.
How to use
- Type an equation in x, for example x^2 - 4 = 0 or 2x + 3 = 7.
- Press Calculate to solve the equation.
- Read the solution: a linear equation gives one value of x, a quadratic gives up to two.
- Press Reset to clear the equation and start again.
Why use Algebra Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Based on standard, well-established formulas.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it for quick mental-math cross-checks
Use it for verifying answers from a textbook
Algebra in statistics and data coursework
Algebra in competitive-exam practice
Use it for science-fair and project numbers
Use it when working through problems
Technical notes
Algebra Calculator rearranges the equation and isolates the variable, using the quadratic formula for degree-2 equations.
Inputs are taken exactly as entered, so check for typos before trusting an answer.
Nothing you type is uploaded — the calculation happens entirely on your device.
FAQ
Which equations can the Algebra Calculator solve?
It solves linear equations such as 2x + 3 = 7 and quadratic equations such as x^2 - 4 = 0 in a single variable x. Higher-degree equations are not supported.
Do I need to move everything to one side first?
No. You can write the equation with an equals sign, such as 3x + 1 = x - 5, and the solver handles both sides for you.
Can I write 2x instead of 2*x?
Yes. Implicit multiplication is supported, so 2x and 3(x+1) are read as 2*x and 3*(x+1).
Does the Algebra Calculator send my data to a server?
No. The Algebra Calculator runs entirely in your browser, so nothing you enter is uploaded, stored, or shared.
Worked example
Expand and solve 3(x − 2) = 9: 3x − 6 = 9, 3x = 15, x = 5.