Easy Grader

What Grade Is a 30/40?

30/40 = 75%, which is a C on both the standard and plus/minus scales. That is 10 wrong out of 40.

75%30 out of 40
Standard
C
Plus / minus
C
Wrong
10

30 ÷ 40 × 100 = 75%

How to calculate 30 out of 40

30 ÷ 40 × 100 = 75%

Divide the number right by the total and multiply by 100. Teachers usually round to the nearest whole percent, so30/40 is recorded as 75% — a C on the standard 90/80/70/60 scale and a C on a plus/minus scale. Each question is worth 2.5%, so 10 wrongcost 25 points.

Nearby scores out of 40

  • 28/40 is 70% (C−)
  • 29/40 is 72.5% (C)
  • 31/40 is 77.5% (C+)
  • 32/40 is 80% (B−)

30 out of nearby totals

Grade a whole test of 40

See the full grading chart for 40 questions for every score out of 40, or open the Easy Grader with 40 questions to mark each paper, add half points and use your own scale.

Frequently asked questions

What grade is a 30/40?

30/40 is 75%, which rounds to 75% — a C on the standard 90/80/70/60 scale and a C on a plus/minus scale.

What is 30 out of 40 as a percentage?

75%. Divide 30 by 40 and multiply by 100: 30 ÷ 40 × 100 = 75%.

Is 30/40 passing?

Yes. 30/40 rounds to 75%, at or above the usual 60% pass mark. Some classes need a C (70%) or higher to pass.

How many questions were missed on a 30/40?

10 out of 40. Each question is worth 2.5%, so 10 wrong takes 25% off a perfect score.