Grading Cost Savings Calculator
A university with 5,000 students submitting three assignments per week generates 15,000 pieces of work to grade, every single week. At 4 minutes per submission, that is 1,000 hours of grading per week. Every semester. This calculator shows what that grading load actually costs and how much AI absorbs through automated feedback and first-pass marking.
Part of the AI ROI Calculator suite for education institutions.
Your Grading Profile
Enter your institution's grading workload.
TA/sessional rate or teacher effective hourly rate
Current Grading Load
100h
grading hours/week
3.6Kh
annual grading hours
Annual Manual Grading Cost
$72.0K
1.5K assignments/week × 4 min × $20/hr
AI Grading Savings
2.2Kh
hours saved/year
$43.2K
gross savings/year
Net Annual Savings
399× return on AI cost
The Hidden Cost of Grading at Scale
Most institutions budget for teacher salaries but never isolate the grading component. When you break it down, how many assignments, how long each one takes, and what that time costs, the number is almost always a surprise. A school of 500 students doing 3 assignments per week at 4 minutes each is paying for 100 grading hours per week, every week the school is in session. That is the equivalent of 2-3 full-time positions just for grading.
AI does not eliminate that cost entirely, written work still needs human eyes. But it eliminates the mechanical parts: logging submissions, running plagiarism checks, identifying factual errors, flagging missing components, and generating boilerplate feedback comments. A teacher who used to spend 4 minutes per submission now spends 90 seconds reviewing and approving AI annotations.
70%
reduction for objective assessments
45%
reduction for written work
60%
blended average reduction
Frequently Asked Questions
How AI grading works and how to interpret the calculator output.
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