Back to School Math Tools 2026 — Free Student Calculators
Heading back to school? Bookmark this page — every math calculator you'll need this year, free and mobile-friendly.
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Quadratic Formula
Solve any quadratic equation ax²+bx+c=0. Enter coefficients — get all roots via quadratic formula, c
Pythagorean Theorem
Apply the Pythagorean theorem to find any side of a right triangle. Enter two sides — get the missin
Percentage Calculator
Calculate percentages, increases and decreases. Quick calculation with worked example and formula. F
Standard Deviation
Calculate variance and standard deviation. Step-by-step solution with formula, example dataset and i
GPA Calculator
Calculate GPA quickly and accurately. Enter your values — see the result with the formula, worked ex