How is a weighted average calculated?

Multiply each score by its weight (decimal), sum those products, and divide by the sum of weights. Example: Homework 85% × 0.20 + Midterm 78% × 0.30 + Final 91% × 0.50 = 85.9% weighted average.

What grade do I need on my final exam?

Formula: Required Score = (Desired Grade - Current Grade × (1 - Final Weight)) ÷ Final Weight. Use the Final Grade Needed mode in the calculator above for instant results.

What is the GPA equivalent of letter grades?

Standard 4.0 scale: A+ = 4.0, A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D = 1.0, F = 0.0.

How do letter grades work?

Standard US scale: A+ ≥ 97%, A ≥ 93%, A- ≥ 90%, B+ ≥ 87%, B ≥ 83%, B- ≥ 80%, C+ ≥ 77%, C ≥ 73%, C- ≥ 70%, D ≥ 60%, F below 60%.

Grade Calculator — Weighted Average & GPA | Temporary Email Address generator edu email 2026

What is a Grade Calculator?

A grade calculator computes your overall course grade by combining individual assignment or exam scores according to their weight in the final grade. Most courses use a weighted grading system where different assessments carry different levels of importance — for example, homework might count 20%, a midterm 30%, and a final exam 50%. Simply averaging all scores without accounting for weights would give an inaccurate result.

Our calculator has two modes. The Assignment Grades mode calculates your weighted average and converts it to a letter grade and GPA equivalent. The Final Grade Needed mode works backwards — given your current grade, the final exam's weight, and your target grade, it tells you exactly what score you need on the final exam.

How to Use the Grade Calculator

Choose a mode: Assignment Grades for a weighted average, or Final Grade Needed to calculate what you need on an upcoming exam.
For Assignment mode: enter each assignment's name, your score (%), and its weight (%). Weights should total 100%.
Use + Add Assignment to add more rows for additional assignments or categories.
For Final mode: enter your current grade, the final exam's weight, and your desired course grade.
Results update instantly — see your weighted average, letter grade, and GPA equivalent.

Why Use Our Grade Calculator?

Two Modes — Weighted average AND final exam needed, in one tool.
Letter Grade & GPA — Automatic conversion with the standard A+/A/A-/B+… scale.
Weight Validation — A warning appears if your weights don't add to 100%.
Unlimited Rows — Add as many assignments or categories as your course requires.
100% Free & Private — Works in your browser, no signup needed.

Frequently Asked Questions

A weighted average is calculated by multiplying each score by its weight (as a decimal), summing those products, and dividing by the sum of all weights. For example: Homework 85% × 0.20 = 17; Midterm 78% × 0.30 = 23.4; Final 91% × 0.50 = 45.5. Sum = 85.9%. This is more accurate than a simple average because it accounts for how much each item counts toward the final grade.

The formula is: Required Final Score = (Desired Grade − Current Grade × (1 − Final Weight)) ÷ Final Weight. For example, if your current grade is 82%, the final is worth 30%, and you want a 90%: Required = (0.90 − 0.82 × 0.70) ÷ 0.30 = (0.90 − 0.574) ÷ 0.30 = 0.326 ÷ 0.30 ≈ 108.7% — meaning a 90% course grade is not mathematically achievable with these numbers. Use our Final Grade Needed mode to check your scenarios instantly.

The standard 4.0 GPA scale: A+ = 4.0, A = 4.0, A- = 3.7, B+ = 3.3, B = 3.0, B- = 2.7, C+ = 2.3, C = 2.0, C- = 1.7, D+ = 1.3, D = 1.0, F = 0.0. Some schools use a modified scale where A+ = 4.3. A 3.0 GPA is a B average; a 3.5+ is typically required for academic honors (Dean's List); most graduate school programs require a 3.0+ for admission consideration.

The standard US letter grade scale: A+ ≥ 97%, A ≥ 93%, A- ≥ 90%, B+ ≥ 87%, B ≥ 83%, B- ≥ 80%, C+ ≥ 77%, C ≥ 73%, C- ≥ 70%, D ≥ 60%, F below 60%. Some institutions use a simpler scale without plus/minus distinctions. Passing grades for credit are typically D (60%) or C (70%) depending on the institution and course requirements. Always check your specific school's grading policy.

Quick Facts

✓ Weighted average mode
✓ Final grade needed mode
✓ Letter grade A+ to F
✓ GPA equivalent (4.0 scale)
✓ 100% free — no login needed