Step by step
- Decide whether all percentages come from groups of the same size or different sizes.
- If the group sizes are equal, type one percentage per line or paste the list into the calculator.
- If the group sizes differ, enter each percentage as the value and its base amount (such as total items or points) as the weight.
- Read the Weighted average result below to get the accurate combined percentage.
At a glance
| Situation | Method to use | Why |
|---|---|---|
| Equal group sizes | Simple average (mean) | Every percentage represents the same number of items. |
| Different group sizes | Weighted average | Larger groups have more impact on the combined rate. |
| Grades with different credits | Weighted average | Higher-credit courses count more toward your final score. |
Related questions
Can I average percentages directly?
You can average them directly only if each percentage is calculated from the same total. Otherwise, a small group with an extreme percentage will skew the result.
How do I weight percentages in the calculator?
Type each percentage in the Value field and its base total in the Weight field. The calculator multiplies each value by its weight and divides by the sum of the weights.
What if I only have the percentages and not the totals?
Without the base totals, you can only compute an unweighted mean. Treat that number as an estimate rather than the exact combined rate.
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Open the full average calculator →
Updated November 14, 2026.