G1 Score Calculator: How Many Can You Get Wrong?

The Ontario G1 knowledge test has a pass rule that catches a lot of first-time writers off guard: it is not one test, it is two. Your road signs score and your rules-of-the-road score are judged separately, and you must clear the bar in both sections on the same sitting. Ace the signs and stumble on the rules, and the result is the same as failing outright.

That is exactly what the calculator above checks. Enter your wrong-answer count from any practice run and it applies the real 16-out-of-20 rule per section, shows how much room for error you had, and tells you which section deserves your next study session. Below, we break down how the scoring really works and how to plan around it.

How the G1 Test Is Scored

The G1 knowledge test is a computer-based, multiple-choice exam taken at a DriveTest centre. It contains 40 questions divided into two equal sections: 20 questions on road signs (regulatory, warning, and information signs) and 20 questions on rules of the road (right-of-way, speed limits, alcohol laws, safe driving practices).

To pass, you must answer at least 16 out of 20 correctly in each section — that is 80% per section. Both sections must be passed independently. There is no partial credit, no rounding, and no way for a strong section to rescue a weak one.

The 16-Out-of-20 Rule, Explained

Think of the exam as two separate mini-tests that happen to be taken back to back. The computer scores them independently, so your overall total is almost irrelevant. A score of 20/20 on signs plus 12/20 on rules is a fail, even though 32 out of 40 sounds like a pass. Flip it around — 12/20 on signs plus 20/20 on rules — and it is still a fail.

The only combinations that pass are the ones where both numbers hit 16 or higher: 16/16, 17/16, 20/19, and so on. Once you see it this way, the study strategy becomes obvious: never let either section lag.

The calculator above makes this concrete. Try a few combinations and watch how the verdict changes: 4 wrong in each section passes, but 5 wrong in one section fails the whole test no matter how well the other section went.

What Happens If You Fail One Section

Failing either section means failing the test. You will need to book and pay for another attempt, so a narrow miss still costs you a return trip to the DriveTest centre and another fee. There is no limit on how many times you can retake the test, which takes some of the pressure off — but each attempt costs money, so passing on the first try is worth preparing for.

The good news: a failed attempt tells you exactly what to study. Because the sections are scored separately, your score report points straight at the weak area. If signs were the problem, your next week belongs to Ontario road signs and sign-heavy practice rounds. If rules were the problem, drill right-of-way, speed limits, and alcohol rules instead of re-reading everything.

A Study Plan That Passes Both Sections

The two sections test different skills, so studying for them the same way wastes time. Signs reward fast visual recognition; rules reward understanding situations. Split your preparation like this:

• Road signs (aim: 18+/20): flip through signs until you can name each one instantly. Group them by colour and shape — red is regulatory, yellow and orange warn, green and blue inform. Test yourself with free G1 practice tests and note every sign you hesitate on.
• Rules of the road (aim: 18+/20): read the situations, not just the answers. Right-of-way, following distances, school zones, emergency vehicles, and alcohol limits are the heavy hitters. Explain each rule out loud as if teaching it — if you cannot explain it, you do not know it yet.
• Full 40-question runs: finish every study block with a timed full test. Watch both section scores, not just the total — the calculator on this page is perfect for scoring those runs.
• Target 90%, not 80%: nerves cost marks. If you consistently score 36+/40 in practice, a bad day still leaves you above the bar.

Common Myths About G1 Scoring

A few persistent myths cost people passes every week. Here is the truth behind each one:

• Myth: “32 out of 40 total is a pass.” Only if both sections hit 16. A 20/12 split is 32 total — and a fail.
• Myth: “The signs section is the hard one.” It depends on the writer. Many people breeze through signs and get ambushed by rules questions on demerit points and alcohol limits. Respect both sections.
• Myth: “Guessing hurts your score.” There is no penalty for a wrong answer, so never leave a question blank. An educated guess is always better than a skip.
• Myth: “The M1 motorcycle test uses the same scoring.” The M1 test has its own format and question mix — see our Ontario M1 motorcycle practice test for how that one is scored.

Frequently Asked Questions

How many questions can you get wrong on the G1 test and still pass?

You can get at most 4 wrong per section — 4 wrong on road signs and 4 wrong on rules of the road. A 5th wrong answer in either section fails that section, which fails the whole test.

Do I need 80% overall or 80% in each section?

80% in each section. The test is two independent 20-question sections, and each is scored on its own. An 80% overall average with one section below 16 correct is still a fail.

How many questions are on the G1 test in total?

40 questions in total: 20 on road signs and 20 on rules of the road. The test is multiple-choice and taken on a computer at a DriveTest centre, usually taking 20 to 30 minutes.

What should I do if I keep failing one section in practice?

Stop studying everything and drill the weak section alone until it is your stronger one. Use the calculator above after each practice run to track the trend, and only return to full 40-question tests once both sections are consistently at 17 or 18 correct.

This calculator and guide are unofficial practice material for study purposes only. We are not affiliated with the Ontario Ministry of Transportation or DriveTest. Test formats, fees, and policies can change — confirm details with the official MTO Driver’s Handbook and DriveTest before your test day.