ERA Goal Calculator
What does it take to reach your target ERA?
Enter your current earned runs, innings pitched and a target. See the innings you'd need under different earned-run scenarios, and how many runs you can afford over a stretch.
Your ERA goal
Current ERA
Target ERA
3.00
20 innings of scoreless pitching reaches 3.00.
That's 60 more outs without an earned run. Allowing runs along the way means pitching longer — see the scenarios below.
Innings needed by earned runs allowed
The fewest additional innings to finish at or below 3.00.
| If you allow | You need | Ends at |
|---|---|---|
| 0 ER | 20 IP (20.0) | 3.00 |
| 1 ER | 23 IP (23.0) | 3.00 |
| 2 ER | 26 IP (26.0) | 3.00 |
| 3 ER | 29 IP (29.0) | 3.00 |
| 5 ER | 35 IP (35.0) | 3.00 |
| 10 ER | 50 IP (50.0) | 3.00 |
Earned runs you can allow
The most earned runs over each stretch that still ends at or below 3.00.
| Next | Max ER | Ends at |
|---|---|---|
| 6 IP | Short — scoreless ends at 3.40 | — |
| 9 IP | Short — scoreless ends at 3.30 | — |
| 18 IP | Short — scoreless ends at 3.05 | — |
| 27 IP | 2 | 2.98 |
| 54 IP | 11 | 2.98 |
| 90 IP | 23 | 2.98 |
The math
Solving the ERA formula for innings
To finish at or below a target ERA T, total earned runs × 27 ÷ total outs must be no more than T. Rearranged: total outs ≥ total earned runs × 27 ÷ T. Subtract the outs you've already recorded and round up to the next whole out.
Example: 40 earned runs in 100 innings is a 3.60 ERA. To reach 3.00 with no more earned runs takes 20 innings of scoreless pitching. Allow 2 earned runs along the way and you'd need 26 innings.
The reverse question works the same way: over a stretch of N innings, the most earned runs you can allow is the largest whole number that keeps the combined ERA at or below the target.
FAQ
ERA goal questions
How many scoreless innings do I need to lower my ERA?
Solve for total outs: required outs = earned runs × 27 ÷ target ERA, rounded up. Subtract the outs you've already recorded to get the scoreless outs still needed. The ERA Goal Calculator shows this as innings.
Does the goal calculator assume anything about future games?
It assumes only the scenario shown in each row: a stretch of future innings with a given number of earned runs. It doesn't predict how you'll pitch, and it uses the exact ERA, so a result must be at or below the target before rounding.