Average Percentage Calculator
Average comma-separated percentages with equal importance or supply matching weights for different exam totals, category sizes, or contribution levels.
Written and checked by TheToolNet Editorial Team · Last reviewed: September 20, 2026 · Editorial method
Calculate average percentage
Simple average percentage formula
For 70%, 80%, and 90%, the sum is 240. Divide by 3 to obtain 80%.
When to use a weighted average
If one result represents twice as many marks, people, credits, or units as another, equal averaging can distort the combined result. Multiply each percentage by its weight, add those products, then divide by total weight.
For exam results with known scored and total marks, the exam marks percentage calculator combines the raw marks directly.
Frequently asked questions
Can I average percentages above 100?
Yes, if that makes sense for the underlying metric. The calculator does not silently cap values.
Should attendance percentages be averaged?
Usually combine attended and held counts for a class-weighted result unless the institution explicitly averages subject percentages.
Do weights need to add to 100?
No. Any non-negative relative weights work because the calculator divides by their total.