This sum of first n odd numbers reference table shows the sum for a range of how many odd numbers (n) values. Every figure is computed with the same engine that powers our Sum of First N Odd Numbers Calculator, so the numbers are exact.
| How many odd numbers (n) | Sum |
|---|---|
| 2.5 | 6 |
| 5 | 25 |
| 7.5 | 56 |
| 10 | 100 |
| 15 | 225 |
| 20 | 400 |
| 30 | 900 |
| 50 | 2,500 |
| 70 | 4,900 |
| 100 | 10,000 |
How to use this table
Find the row closest to your how many odd numbers (n) and read across to the sum. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Sum of First N Odd Numbers Calculator for a precise answer.
Need a value that is not in the table? — the Sum of First N Odd Numbers Calculator does it instantly, for free, with the formula and a worked example built in.
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