About StudyTools

Cutoff points: some schools start an A at 90%, others at 93%.
Plus/minus: not every school uses A- / B+ steps.
Weighted courses: AP, IB and honors classes may map to 4.5 or 5.0 instead of 4.0.

StudyTools is a collection of free, in-browser calculators and practical guides made for students. No accounts, no installs, no clutter — open a tool, get an answer, get back to studying.

Why we made it

Most student calculators are buried inside apps or behind sign-ups. We wanted a set of fast, honest tools that work on any device and answer the questions students actually ask: What is my GPA? What do I need on the final? How long should I study?

Our approach

Tools are transparent — you can see the formula and check the math.
Guides are short and practical, not padded.
Everything runs in your browser; your numbers never leave your device.