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Quarter Grade Calculator

Institutions operating on the quarter system (such as the University of California system, Stanford University, Northwestern, Dartmouth, and the Unive

Grades & GPA
%
Term 1 / Fall Quarter grade percentage
units
Quarter credit units completed (typically 4)
%
Term 2 / Winter Quarter grade percentage
units
Quarter credit units completed (typically 4)
%
Term 3 / Spring Quarter grade percentage
units
Quarter credit units completed (typically 4)
Formula & Methodology
Quarter Average = Σ(Term Grade × Quarter Units) ÷ Total Quarter Units; Semester Credits = Total Quarter Units × (2 ÷ 3)

To calculate your cumulative quarter grade average, multiply each quarter term's percentage grade by the number of units attempted in that term (typically 4 units per course), sum the points, and divide by the total quarter units completed. To convert quarter units to semester credit hours (essential when transferring to a semester-based college), multiply the total quarter units by 2/3 (or divide by 1.5).

Cumulative Quarter Academic Grade Average

89.3% B

Overview

Institutions operating on the quarter system (such as the University of California system, Stanford University, Northwestern, Dartmouth, and the University of Chicago) divide the academic year into four 10-week terms: Fall, Winter, Spring, and an optional Summer session. Because quarter courses move at a faster pace and carry shorter instructional durations, quarter units carry different mathematical weight than semester credits.

This Quarter Grade Calculator computes your cumulative grade average across quarter terms and translates your quarter units into equivalent semester credit hours using the nationwide standard 2/3 conversion ratio (1 quarter unit = 0.667 semester credit hours).

Worked Examples

Three Standard 4-Unit Quarters (Fall, Winter, Spring)

Fall: 86% (4 units); Winter: 92% (4 units); Spring: 90% (4 units).

  1. Fall Term Points: 86 × 4 = 344.0 points
  2. Winter Term Points: 92 × 4 = 368.0 points
  3. Spring Term Points: 90 × 4 = 360.0 points
  4. Total Weighted Points: 344.0 + 368.0 + 360.0 = 1072.0 points
  5. Total Quarter Units: 4 + 4 + 4 = 12.0 units
  6. Cumulative Quarter Average: 1072.0 ÷ 12.0 = 89.33%
  7. Convert to Semester Credits: 12.0 × (2/3) = 8.0 semester credit hours
Final Answer: 89.3% Average (Grade: B+ | 8.0 Semester Credits Equivalent)

Varying Unit Load Across Terms

Term 1: 95% (5 units); Term 2: 85% (3 units); Term 3: 90% (4 units).

  1. Term 1: 95 × 5 = 475.0
  2. Term 2: 85 × 3 = 255.0
  3. Term 3: 90 × 4 = 360.0
  4. Total Points: 1090.0. Total Units: 12.0 units
  5. Average: 1090.0 ÷ 12.0 = 90.83%
Final Answer: 90.8% Quarter Average (Grade: A-)

Two Quarter Academic Year Progress Audit

Fall: 80% (4 units); Winter: 88% (4 units); Spring: 0% (0 units).

  1. Total Points: (80 × 4) + (88 × 4) = 320 + 352 = 672.0
  2. Total Units: 8.0 units
  3. Average: 672.0 ÷ 8.0 = 84.0%
Final Answer: 84.0% Quarter Average

How to Use This Calculator

  1. Enter your final percentage grade for Fall Quarter.
  2. Enter the total quarter units completed for Fall Quarter (typically 4 units).
  3. Repeat for Winter Quarter and Spring Quarter.
  4. Click Calculate to see your cumulative quarter average and semester credit hour conversion.

Reference Table

Quarter System MetricSemester System EquivalentConversion Mathematical FactorNotes
1 Quarter Unit0.667 Semester CreditsMultiply by 2/3Standard collegiate transfer conversion
3 Quarter Units2.0 Semester CreditsMultiply by 2/3Short quarter course or seminar
4 Quarter Units2.67 Semester CreditsMultiply by 2/3Standard quarter course workload
12 Quarter Units8.0 Semester CreditsMultiply by 2/3Full-time quarter term load
180 Quarter Units120 Semester CreditsMultiply by 2/3Typical bachelor’s degree graduation requirement

Frequently Asked Questions

How do you convert quarter units to semester credit hours?
To convert quarter units to semester credits, multiply the quarter units by 2/3 (approximately 0.6667) or divide by 1.5. For example, 12 quarter units equals exactly 8 semester credit hours.
Why do quarter colleges use 4-unit classes instead of 3-credit classes?
In the quarter system, students take 3 to 4 classes per 10-week term (typically 12–16 quarter units) across three terms per year. This allows students to take 9 to 12 courses per year compared to 8 to 10 in a semester calendar.
Is a quarter system GPA different from a semester GPA?
The mathematical quality point scale (A = 4.0, B = 3.0, etc.) is identical between quarter and semester universities. However, your cumulative degree credits differ because quarter credits accumulate 1.5 times faster than semester credits.
How many quarter units are needed to graduate college?
Most quarter-system universities require 180 quarter units to graduate with a bachelor’s degree (equivalent to 120 semester credit hours).
What is considered full-time enrollment under a quarter calendar?
Full-time undergraduate enrollment in a quarter system requires a minimum of 12 quarter units per term (the same minimum threshold as semester colleges for federal financial aid).

Related Calculators

🧮Semester Grade Calculator🧮Grade Calculator🧮Weighted Grade Calculator🧮College GPA Calculator🧮Final Grade Calculator
Reviewed & Authored by: OnlineConvers Academic Editorial Team · Last Updated: 2026-10-07
Quarter grade roll-ups calculate unit-weighted averages across academic quarter terms. Conversions between quarter units and semester credit hours follow the national institutional convention of multiplying quarter units by two-thirds (2/3). All conversions reflect standard AACRAO articulation agreements.
Citations: Academic Calendar Conversions: Quarter to Semester Hours (AACRAO Transfer Credit Practices) · University of California Quarter Credit Hour Regulations (University of California Academic Senate)