The cost to level up something with quadratic scaling is the new level, squared, in Experience. If you wish to level something up more than one level at a time, you must still pay for the intermediate levels.
| Level | Experience Cost | Total Experience Cost |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 4 | 5 |
| 3 | 9 | 14 |
| 4 | 16 | 30 |
| 5 | 25 | 55 |
| x | x^2 | (x(x+1)(2x+1)/6) |