108 Corner Calculator

A small, draggable TI-108-inspired calculator with percentage and square root keys.

108 Corner Calculator adds a small, movable calculator to the corner of your browser page—helpful for math practice and everyday calculations. Features: • Addition, subtraction, multiplication, and division • Dedicated percentage (%) and square root (√) keys • Memory functions • Keyboard input while the calculator is focused • Draggable placement Click the extension icon to show or hide the calculator. Drag the label above the buttons to move it. Calculations run locally. No account is required, and no user data is collected or transmitted. Works on regular web pages. Chrome internal pages and certain restricted pages do not support the calculator. School-managed accounts may require administrator approval. Inspired by the TI-108 layout. Independently developed and not affiliated with Texas Instruments or the TSIA2 testing program.