DeCod-ED
FreeFull-length SAT diagnostic

See your SAT starting point before test day.

Take a free, full-length digital SAT practice test. Get a scaled score out of 1600 and a Skill Map showing where to focus your preparation. No card.

Continue to signup with your email prefilled. This form does not create an account.

Fulllength, timed98scored questionsSkill Mapknow what to review
Focus.

A score tells you where you are. Your Skill Map helps you decide what to work on next.

How it works

Three steps to your starting point.

No.01

Sign up with email

No card required. Create your account to access one free full-length diagnostic.

No.02

Take it like the real thing

98 scored questions. 134 minutes of testing, plus a 10-minute break. Set aside time for the full session.

No.03

Understand your starting point

Review your scaled score, section breakdown, and Skill Map. See which skills need your attention.

Why start with a diagnostic

A good mock test is not just a hard test. It is a test with a purpose.

Your first job is to understand where you stand. Take the diagnostic, review your results by skill, then choose practice with a clear focus.

Timed practice

Practice with the clock in view and review how you used your time.

Full practice tests

Complete forms with Standard and Adaptive subscriptions. Available forms depend on your program and assignments.

Skill Map

Accuracy and attempt counts by skill across your completed tests.

Plans

Start free. Keep going when you are ready.

Start here

Free diagnostic

$0

One full-length diagnostic with a scaled score and Skill Map. No payment card required.

  • 98 scored questions
  • Reading & Writing and Math section scores
  • Per-skill accuracy and attempt counts
Start my free test

Volume

$49/month

Diagnose what needs work and practice with a plan.

  • One free full-length diagnostic with a scaled score and Skill Map, no card required
  • Generated full-length tests
  • Against the Clock timed sections
  • Skill drilling
  • Skill Map: per-skill accuracy, attempt counts, and trends
  • Cancel anytime
View Volume

Adaptive

$99/month

Build on your results with personalized Adaptive forms when eligible.

  • Everything in Volume
  • Adaptive forms when offered and eligibility requirements are met
  • Practice informed by your completed tests
  • Cancel anytime
View Adaptive

Subscription availability is shown on the pricing page. Adaptive forms are available on the Adaptive plan when offered. Math Lab and the vocab review queue are planned, not currently available.

FAQ

Free SAT diagnostic, answered.

Is the SAT diagnostic really free?

Yes. Create an account to take one free full-length diagnostic with a scaled score and Skill Map. No payment card is required.

How long does the free SAT practice test take?

The default full-length diagnostic has 98 scored questions and 134 minutes of testing, plus a 10-minute break. Allow about 2 hours 24 minutes for the testing session.

What does my diagnostic score tell me?

Your scaled practice score gives you a starting point for preparation, not a guarantee of your official SAT result. Review your section scores and Skill Map to decide where to focus next.

Does it feel like the real digital SAT?

The full-length diagnostic gives you timed digital SAT practice across Reading and Writing and Math. Use it to practice managing your time and working through a complete test.

What do I get after the test?

You get a scaled score out of 1600 and section scores. Your Skill Map shows accuracy and attempt counts per skill across completed tests, helping you identify areas to review.

Free · full-length · no card

Know your starting point. Then work on it.

Start my free test