Recent calculations
Choose an entry to edit it. History stays in this tab.
Using this calculator
A familiar scientific keypad for practicing arithmetic, fractions, trigonometry, statistics and more. Press mode to choose degrees, radians or gradians. Press data for one- or two-variable statistics; 2nd → data opens the same statistics workspace.
Enter completes a calculation. The answer-toggle key shows a simple fraction approximation when available. Arrow keys edit the entry or recall history. Percent means divide by 100: 100 + 10% gives 100.1. Calculations and memory stay in this browser tab and clear on reload.
Scope and differences
This is an independent calculator inspired by TI-36X Pro workflows, not a TI product or a firmware emulator. Menus and fraction entry are adapted for the web; results use ordinary double-precision arithmetic, not TI’s exact-expression system. Fraction conversions and numerical solvers are approximate. Statistics use the exclusive-median quartile convention.
Available tools: one- and two-variable statistics, linear regression, function tables, bracketed real-root solving, quadratic real roots, linear systems, numerical derivatives and integrals, matrices up to 3 × 3, two- or three-dimensional vectors, complex arithmetic, integer base conversion, selected constants and unit conversions. Distribution functions, stored-operation sequences and TI-specific display modes are not reproduced.
Original calculation code and artwork. Open-source reference attribution. TI-36X Pro is a Texas Instruments trademark; no affiliation or endorsement. Parsing uses mathjs under its Apache 2.0 license and notices.