Zerdly

Test Grade Calculator

Turn correct answers or points earned into a test percentage and letter grade instantly using this free test grade calculator in your browser.

100% FreeRuns in your browserBasic
How to use this calculator

Result

Enter the scores above.

Grade scale

Illustrative US-style scale; edit it to match your school. Each band starts at its minimum (inclusive).

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Batch (optional)

One per line: label, correct, total. Labels stay in this tab and are never sent anywhere.

How the method works

Completed work and the final contribute separately
Illustrative method
Completed work and the final contribute separatelyA 0 to 100 course-points axis. Completed work carries 70 points of weight and has banked 54.6 of them at a 78% average; the final carries 30 points and must supply 25.4 more to reach the 80-point target, which is 84.6667% on the final.Weight of each part (course points)Completed work · 70Final · 30Points: banked + still needed from the finalbanked 54.6+25.4target 800255075100Final needed: 25.4 ÷ 30 = 84.6667%
Completed work: 78% average × 70% weight = 54.6 points banked. Target 80 − 54.6 = 25.4 points must come from the final, which is worth 30 points: 25.4 ÷ 30 = 84.6667% needed. Formula: required = (target − current × (1 − w)) ÷ w.

Grade boundaries, rounding and pass marks belong to your institution; none is assumed here. Fixed example values for illustration — not your result.

How to use this calculator

  1. Choose question counts (correct, incorrect, blank, with an optional penalty per wrong answer) or points with partial credit.
  2. Pick a rounding policy, and edit the grade scale to match your school.
  3. Read the score, the letter, and how far you are from the next grade. Paste a list to grade a batch privately.

How it works

Score = earned ÷ possible × 100. In question mode each correct answer earns 1 and each wrong one loses the penalty; correct + incorrect + blank must equal the total.

A penalty can push the raw score below zero; the floor at 0% is shown separately. Points above 100% count only if you allow bonus.

The letter comes from your scale after your rounding policy — so 79.95% stays below 80% unless you choose to round. The default 90/80/70/60 scale is an illustrative US-style example.

Worked example

42 of 50. = 84% (B), 8 missed. 79.95% is a C, or a B if you round to the nearest whole percent.

Common mistakes

  • Entering more correct answers than questions.
  • Assuming every school uses 90/80/70/60.
  • Rounding 79.95 up without a rule that says so.

Tips

  • Runs entirely in your browser. Your inputs are not saved or transmitted.

Frequently asked questions

Can I change the scale?

Yes — edit the bands, add or remove grades, and reset to the illustrative default at any time.

Privacy?

Runs entirely in your browser. Your inputs are not saved or transmitted.

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Cite this tool

Zerdly. (2026). Test Grade Calculator. Retrieved from https://www.zerdly.com/tools/test-grade-calculator/

Tip: Enter any known values to calculate the remaining results.

Designed to run locally in your browser. Tool inputs are not intentionally stored by Zerdly unless stated otherwise.