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Snap any SAT math question
Take a photo or upload a screenshot of any question from a practice test, Bluebook, or your homework.

Welcome to CalcHack

An account keeps your scans and your membership on every device you use.

Guests get the same free scans — an account is only required to buy a Pro membership. You can sign up anytime in Settings.

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Stuck on a question?

Snap it. CalcHack finds the fastest way to solve it in Desmos — or tells you when doing it by hand is quicker.

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1

Snap the question with your camera

2

Get the fastest Desmos strategy

3

Watch it solved on a live graph

Built for the digital SAT

Answers come back as the exact keystrokes for the Desmos calculator built into Bluebook — plus a live graph so you can see it work.

Linear systemsQuadraticsCircles & conicsExponentialsTrigStatisticsWord problems

Desmos cheat sheet →
See a worked example →

Walkthrough

Answer look wrong? Tell me about it — it's how this gets better.

History

Every question you scan is saved here. Pin the tricky ones to review before test day.

Saved scans

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CalcHack Pro

Unlimited scans. Every strategy. Test-day ready.

✓Unlimited question scansFree plan includes 5 scans per day
✓Live interactive Desmos graphsTap through each step on a real calculator
✓"Fastest method" verdictsKnow instantly when Desmos beats algebra
✓Full scan historyBuild a personal review bank before test day
Monthly
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BEST FOR TEST DAY
3 months
$14.99
$5.00/mo · a full prep cycle
Annual
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$3.33/mo · a full school year
$14.99 billed today, then $14.99 every 3 months until you cancel. Cancel any time in Settings → Manage or cancel; it takes two clicks and you keep Pro until the period you paid for ends. Full refund within 14 days, no questions asked.

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Settings

Appearance
Hide the answer at firstBlurs the answer so you can try the steps yourself. Turn this off to see it straight away.
AI Engine
100% free, no credit card. Get one in ~60 seconds: go to aistudio.google.com → sign in with any Google account → Get API key. Free tier allows hundreds of scans per day. Stored only on this device.
Optional. Get a key at console.anthropic.com. Each scan costs roughly 1–2¢.
Graphing
CalcHack uses its own Desmos API key. You can override it here with your own if you prefer.
Data
Scan history0 saved scans on this device

Signed in, your scans sync to your account and follow you between devices. As a guest they stay on this device only.

v2.8 · answer toggle
Desmos cheat sheet  ·  Worked example

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CalcHack is an independent study tool. It is not affiliated with or endorsed by College Board®, Desmos, or Google. SAT® is a registered trademark of College Board. Graph powered by the Desmos API.

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