SAT math practice
Snap or upload an SAT math question you're practicing. CalcHack shows you the quickest method — usually in Desmos, sometimes by hand — and walks you through it step by step on a live graph.
If f(x) = 2x² − 7x + 3, what is the sum of the solutions of f(x) = 0?
Take a photo or upload a screenshot of a question from a practice test, Bluebook practice, or your homework.
A clear verdict: Desmos, or by hand. If Desmos wins, you get the exact keystrokes to type.
Tap through each step on a real embedded Desmos calculator — the same calculator that's built into Bluebook.
CalcHack tells you when doing it by hand is quicker — like sum-of-roots questions — instead of pushing the calculator every time.
Turn on Hide the answer in Settings to work the question yourself. Reveal only when you've had a go.
Walkthroughs flag the tempting wrong answer a question is built around, plus the algebra route if you prefer it.
Every scan is saved to your history. Pin the tricky ones and come back to them in your next study session.
After a few scans, CalcHack shows which topics come up most and links to free Khan Academy practice for that topic.
Linear systems, quadratics, circles & conics, exponentials, trig, statistics and word problems.
Bluebook gives you official practice tests. Khan Academy gives you free, structured lessons. CalcHack fits in between: when a practice question stops you, it shows you the quickest way through and how to do it in Desmos — so next time you can do it yourself.
Start free with 5 scans a day. Go Pro to remove the daily cap while you prep.
Cancel any time in Settings. Full refund within 14 days. Score improvement not guaranteed.
No. CalcHack is a study aid for practice and homework. Don't use it during any exam, proctored test, or anywhere your school or College Board doesn't allow outside help — see our Terms. What it does is help you get fluent with the Desmos calculator that's built into Bluebook, so you're comfortable with it on your own.
No — keep using both. CalcHack is for the moment a practice question stops you and you want to see the quickest way through it.
CalcHack uses an AI model, and AI can make mistakes. Always check the work against your own reasoning or the official answer key.
Not to start. A free account lets your scans follow you between your phone and laptop, and keeps a Pro membership attached to you rather than one browser.
No advertising trackers, and we don't sell personal data. CalcHack keeps anonymous daily totals (like how many scans happened) on its own server and deletes them after about 100 days. Details in our Privacy Policy.
Snap it and see the fastest way through. Five free every day.
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