A Free Online Scientific Calculator Worth Bookmarking
Alongside your GPA, NEB Science and Management students often need a proper scientific calculator for coursework — integration, matrices, statistics, equation solving, and more. Most "online scientific calculators" only offer basic trig and log buttons. The one below is different: it's a full browser recreation of the Casio fx-991ES PLUS.
Open the free scientific calculator →Why it's worth using
- Natural textbook display for fractions, powers, and roots — not a flat text input.
- Definite integration, differentiation, and summation (Σ) built in.
- Matrices, vectors, and complex number arithmetic (rectangular and polar).
- Quadratic, cubic, and simultaneous equation solving with real and complex roots.
- Statistics with 7 regression types, plus base-N (binary/octal/hex) and bitwise operations.
- Runs entirely in the browser, works offline as a PWA, no sign-up required.
Quick FAQ
- Is it free to use?
- Yes — it's free with no account required.
- Does it work like a real Casio calculator?
- It follows the fx-991ES PLUS layout and function set closely, including SHIFT/ALPHA key behavior and natural display.
- Can I use it on my phone?
- Yes, it's responsive and also installable offline as a PWA.