At a glance
+100%
speed halves the time. It does not bring it down to zero.
Time ÷ (1 + bonus)
The formula: 10 h with +25% gives 10 ÷ 1.25 = 8 h.
Bonus, help, speedups
The order: first the bonus, then alliance help, then your speedups.
A speed bonus means "you work faster", not "this percentage is removed from the clock". That's why +100% gives half the time, not zero.
Examples on a 10-hour build
| Speed bonus | Real time | Time saved |
|---|---|---|
| +0% | 10 h | 0 |
| +20% | 8 h 20 | 1 h 40 |
| +50% | 6 h 40 | 3 h 20 |
| +100% | 5 h | 5 h |
| +200% | 3 h 20 | 6 h 40 |
Each slice of bonus saves a little less than the one before. Going from +0% to +100% saves 5 hours, going from +100% to +200% only saves 1 h 40.
Step-by-step
- Take the base time of the build, research or training.
- Divide by 1 + your bonus: +30% → divide by 1.3; +120% → divide by 2.2.
- Subtract alliance help: each help you receive removes a bit of time.
- Subtract your speedups: what's left is what you really need. The speedup calculator does this for you.