Calculator Inputs
Formula Used
Effective stamina per run = Stamina per run × (1 − Stamina discount ÷ 100)
Expected random drops per run = Drop rate ÷ 100 × Drops per success × (1 + Drop bonus ÷ 100)
Expected drops per run = Guaranteed drops per run + Expected random drops per run
Total stamina = Effective stamina per run × Runs planned
Expected drops = Expected drops per run × Runs planned
Stamina per drop = Total stamina ÷ Expected drops
Runs needed = Target drops ÷ Expected drops per run, plus safety buffer
Refills needed = Extra stamina needed ÷ Stamina per refill
How to Use This Calculator
- Enter the stamina cost for one run or mission.
- Add the number of planned runs.
- Enter the drop rate as a percentage.
- Add average drops received after a successful drop.
- Use guaranteed drops when each run always gives some reward.
- Add bonus and discount values when an event improves farming.
- Enter your target drops and current stamina.
- Press the calculate button to view efficiency, target runs, and refills.
Example Data Table
| Scenario | Stamina Per Run | Runs | Drop Rate | Drops Per Success | Expected Drops | Stamina Per Drop |
|---|---|---|---|---|---|---|
| Daily stage | 20 | 50 | 35% | 1 | 17.50 | 57.14 |
| Event boost | 18 | 60 | 45% | 1.25 | 33.75 | 32.00 |
| Guaranteed farm | 30 | 40 | 20% | 2 | 56.00 | 21.43 |
| Rare material | 25 | 80 | 12% | 1 | 9.60 | 208.33 |
Advanced Stamina Planning Guide
Why Stamina Per Drop Matters
Advanced stamina planning helps players spend limited energy with less guessing. A drop may be rare, guaranteed, boosted, or tied to a repeated mission. This calculator turns those inputs into a clear farming estimate. It shows how much stamina each expected drop costs. It also shows how many runs are needed for a target reward.
Reading the Main Result
The main result is stamina per drop. Lower values mean better farming value. A mission that costs less stamina can still be weak when its drop rate is poor. A costly mission can be strong when it gives high average rewards. This is why drop rate, bonus rewards, guaranteed items, and stamina discounts should be reviewed together.
When to Use It
Use the tool before events, daily farms, raids, and resource grinds. Enter the stamina cost, run count, drop chance, average drops, and any bonus. Then compare the expected drops with your target. The refill estimate helps you decide whether extra energy is worth using. It can also show when waiting for natural stamina is smarter.
Handling Random Drops
The confidence range is useful for random drops. It does not promise exact loot. It gives a planning range based on common probability spread. Real results can be better or worse, especially with few runs. Larger run counts usually move closer to the expected value.
Improving Your Farming Plan
For best results, update the calculator after every farming session. Replace planned runs with actual runs. Adjust the drop rate when you have better data. Compare several stages using the same target. Choose the stage with the lowest stamina per drop, unless it also gives weaker side rewards.
Useful Record Keeping
This calculator is designed for general use. It can support mobile games, role playing games, event shops, loot boxes, resource dungeons, and training systems. It is also helpful for content creators who explain farming value. The export buttons keep records simple. Save the CSV for spreadsheets. Save the PDF for sharing reports.
Final Tip
Smart farming is not only about speed. It is about using energy where rewards are strongest. A clear stamina per drop value makes that decision easier.
FAQs
1. What does stamina per drop mean?
It means the expected stamina cost for one reward drop. A lower number usually means better farming efficiency and stronger value.
2. Can I use this for any game?
Yes. The calculator is general. It works for games, event farms, resource missions, stamina systems, and similar reward loops.
3. What is drop rate?
Drop rate is the chance that a run gives the random reward. Enter it as a percentage, such as 35 for thirty-five percent.
4. What are guaranteed drops?
Guaranteed drops are rewards received every run. Add them when the mission always gives a fixed amount before random rewards.
5. Why add a safety buffer?
A safety buffer adds extra planned runs. It helps when random drops are unlucky and your target needs more attempts.
6. Is the confidence range exact?
No. It is an estimate based on probability spread. Actual drops can vary, especially when the number of runs is small.
7. What is drop bonus?
Drop bonus increases expected rewards. Use it for event boosts, item bonuses, character bonuses, pass bonuses, or account upgrades.
8. When should I compare stages?
Compare stages before spending refills. The best stage usually has the lowest stamina per drop plus useful side rewards.