There's a category of math you'll do a hundred times in your life and still not bother to memorize the steps for. Long-form percentage problems. Greatest common divisors. Quadratic roots. Statistics on a list of numbers your boss just pasted into Slack. CalcMaster's math section is for those exact moments.
The everyday three
Basic, Percentage, and Scientific. If you're working out a tip, a markup, or sin(45°), these three cover ~80% of all math you'll ever need to do on a website. The Scientific one supports parentheses, constants (π, e), trig, log, and exp.
The number-theory three
| Calculator | Solves |
|---|---|
| Prime Checker | Is N prime? If not, what are its factors? |
| GCD / LCM | Greatest common divisor, least common multiple — accepts any list |
| Number System | Binary ↔ octal ↔ decimal ↔ hex, in one live grid |
These come up surprisingly often if you write code, study cryptography, or help a kid with homework.
The algebra three
- Quadratic Solver — roots of
ax² + bx + c = 0, with a graph so you can see where it hits zero - Logarithm —
log_b(x)with a base picker (default 10, common bases are 2, e, 10) - Fraction Calculator — add, subtract, multiply, divide; result is always reduced
The combinatorics + stats two
Permutation & Combination covers nPr (order matters) and nCr (order doesn't). If you've ever stared at a probability question wondering which one applies, the answer is: "does swapping the order create a different outcome?" If yes, P. If no, C.
Statistics takes a comma-separated list and returns mean, median, mode, range, variance, and standard deviation — plus a quick histogram. Paste your data, get the answer, move on.
The matrix one
Matrix Calculator handles 2×2, 3×3, and 4×4 matrices: addition, multiplication, determinant, transpose, inverse. It's a niche tool, but when you need it (linear algebra homework, computer-graphics math, optimization problems), nothing else beats having it one click away.
Why a web calculator for math?
Three reasons:
- Phone keyboards are terrible for
cos⁻¹(0.5)or a 3×3 matrix. A real form beats them every time. - Stepwise output — most physical calculators just give you a number. CalcMaster shows the intermediate steps so you can verify (and learn).
- Shareable URLs — every result is a URL you can paste into a chat. (Coming in the next release.)
Browse the math category or jump straight to the scientific calculator which is the workhorse of this section.