Calibrate

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Precision prep for every admission exam, worldwide

Calibrate your score.
Open every door.

Nearly 50,000 original practice questions and full-length timed tests at the real exam length — for the ISEE, SSAT, HSPT, SAT, ACT, UK 11+, IB, TOEFL and IELTS. Free to use, no card needed.

  • Every question written for this site — not scraped
  • Tests run at real exam length and timing
  • Practice never spoils your next test
Practice questions
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Sample readout · what your dashboard shows
Score projection
Sign in and take a practice test to see your real projection
Per-section accuracytracked
Strengths & focus areastracked
Score trend over timetracked

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Practice questions in the bank

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Exams in the directory

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Vocabulary decks

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AI tutor availability

Everything you need

Seven instruments, one score.

Every tool reads the same gauge — your student's growth toward test day, across whichever exam they're taking.

Exam directory

Every major exam worldwide, grouped by what it's for, each linked to official practice from the people who write it.

Adaptive practice

Questions get harder the more you get right — and ease up when you don't. Just like Math Academy.

Learn, then practice

Short concept lessons with worked examples, followed immediately by matched practice questions.

Full-length practice tests

Timed, section-ordered simulations that mirror real test-day format for each exam.

Vocabulary flashcards

Write your own definition, then flip the card to check yourself — active recall, not passive review.

AI Tutor

A patient, on-demand tutor that explains any question, in any subject, at any hour.

Saved progress

Sign in once and every official test score is saved, so you can track growth over time.

Pricing

Start free. Upgrade when it's paying off.

Free

$0

Free forever. No card, no trial clock.

  • The entire question bank — all 48,000+
  • Unlimited full-length timed tests
  • Unlimited adaptive practice
  • All 874 flashcards, every deck
  • Progress tracking and score projection
  • 5 AI Tutor questions every day
Most popular

Plus

$4.99/month

Or $49 a year — two months free.

  • Everything in Free, plus:
  • Unlimited AI Tutor — ask anything, any time
  • Unlimited Learn lessons on any topic
  • Lessons tailored to your exam and level
  • Progress synced across every device
  • Priority support

Family

$8.99/month

Up to 3 students. Or $89 a year.

  • Everything in Plus, for 3 accounts
  • Each student keeps their own progress
  • One payment, one renewal
  • Priority support
We accept VISA Mastercard Amex Apple Pay Google Pay

Payments handled by Stripe — we never see your card details. Cancel any time. Prices in US dollars. The free plan stays free; it isn't a trial.

Your best score is a calibration away.

Free diagnostic. Personalized study plan. No card required.

Choose your exam

Every major admission exam, in one place.

Full question banks and timed simulations for the exams below, and official practice links for everything else.

The exam

Every section, mapped.

Practice bank

Find your topic. Take the quiz.

Practice pool only. Every question held back for a full-length practice test is excluded here, so drilling a topic never spoils a real sitting.

Filter by exam, or search by keyword, level, subject, or question type — then start a quiz that gets harder the more you get right, and eases up the more you miss.

Timers match each section's real published length. Question counts are a smaller sample than the full official test, since this is a practice bank rather than a released past paper — but you'll always face real official timing pressure.

A–D to answer · Enter to advance
Adaptive practice

Separate from the tests. These questions are never used in a full-length practice test, so your test stays untouched however much you practise.

Practice that gets harder as you do.

Start at a medium difficulty. Answer right, and the next question steps up. Answer wrong, and it eases back — so you're always working at the edge of what you know.

Learn 5 of 5 left today

What do you want to learn today?

Tell me any topic — a concept, a question type, a whole subject — and I'll teach it the Math Academy way: explain it simply, work through one example, then hand you practice problems.

Or jump into a ready-made lesson

Flashcards

Vocabulary, the active-recall way.

Type your own guess at the definition first, then flip the card to see how close you were.

AI Tutor 5 of 5 left today

Ask anything. Any exam, any hour.

Explains reasoning, walks through problems step by step, and adapts to whichever test you're prepping for.

Exam context

Try asking

Hi! I'm your Calibrate AI Tutor. Tell me what exam you're working on and what's tripping you up, and I'll walk through it with you.
Progress

Your saved history.

Every practice test you complete while signed in is saved here.