Egg Hatch Calculator
Type the egg’s original hatch time and your total hatch speed bonus to see the real hatch time and how much time the bonus saves.
Values last checked: (Grow a Garden 1 data)
How to use it
- Enter the egg’s hatch time in hours and minutes.
- Add up every hatch speed bonus you have and enter the total percentage.
- Read the new hatch time and the time saved.
How hatch speed bonuses work
Hatch speed is a rate, not a flat reduction: the egg timer is divided by 1 + your total bonus. That means stacking bonuses has diminishing returns.
| Total speed bonus | 4-hour egg hatches in | Time saved |
|---|---|---|
| +0% | 4h | 0s |
| +25% | 3h 12m | 48m |
| +50% | 2h 40m | 1h 20m |
| +100% | 2h | 2h |
| +200% | 1h 20m | 2h 40m |
Going from +0% to +100% saves two hours on a 4-hour egg; the next +100% only saves another 40 minutes.
Planning hatches
Start long eggs before you log off and short ones while you play. Heavier hatches give bigger pets, so check the pet weight calculator as soon as something good comes out.
Frequently asked questions
How does hatch speed work?
Speed bonuses divide the hatch time: +100% speed halves it, +50% cuts it to two thirds.
Do hatch speed bonuses stack?
Yes. Add all your bonuses together into one percentage and enter that total.
Do eggs hatch while I am offline?
Egg timers keep running, so plan to come back when the calculated time is up.