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Sailor Piece Grinding Time Calculator
Drop and grinding duration calculator for luck-adjusted odds, summon materials, rare material drops, upgrade currency goals, and estimated farming time.
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Overview
Sailor Piece Grinding Time Calculator
- Use this calculator when you want a quick estimate for boss kills, rare material drops, summon materials, and grinding time before committing to a farm.
- Search a tracked boss drop to auto-fill its chance and pity, then adjust Luck (%) or edit Drop chance (%) if your in-game number is different.
- For multi-copy farms, the calculator accounts for +1 drop chance and 2x Drops; one-copy unlocks stay treated as one-copy goals.
- The duration section estimates Boss Rush, Infinite Tower, and Crystal Defense upgrade grinds from your clear time and currency per clear.
- Infinite Tower can auto-fill Tower Token payout from the highest floor you clear, +1 dropchance build, and 2x Drops.
- World boss estimates can include the 15-minute spawn timer, so long routes like Cosmic Being, Spirit Warrior, and Sun God feel closer to real session time.
Farm Math
Drop and material estimate
Selected route
Custom drop chance
No summon cost tracked for custom odds.
Chance per kill
1%
Average kills required
100
Estimated grinding time
1 hr 40 min
Quantity multiplier
1x
Average summon cost
- No summon cost tracked.
Session Math
Currency grind duration estimate
Selected grind
Boss Rush permanent upgrades
Max upgrade target uses the current tracker ladder.
Sessions needed
0
Total grind time
0 min
Total max cost
0
Current progress remaining
0
Upgrade lines left
- No activity selected.
Average currency per clear/session should include 2x Drops and +1 drop effects when those affect the mode payout.
How does the grinding time calculator use Luck?
For tracked material and item drops, it starts from the normalized 100% Luck baseline, multiplies it by your Luck (%), and auto-fills Drop chance (%). If you manually edit Drop chance (%), the calculator uses that value directly and does not multiply it by Luck again. Title drops ignore Luck.
How do +1 drop chance and 2x Drops affect the estimate?
They only reduce the average kills and time when the target needs extra copies. 2x Drops counts as two guaranteed copies on an eligible successful drop, and +1 drop chance can add another copy on top. They do not apply to title, sword, or style unlocks.
Does the calculator include pity?
Yes for drops where the lookup has a pity or guarantee value. Average kills shows the natural drop-rate estimate with the pity threshold called out, while estimated grinding time uses the pity route so the time reflects the guaranteed path.
Can it estimate Boss Rush, Infinite Tower, and Crystal Defense upgrade grinds?
Yes. The Grinding Duration Calculator uses the current permanent-upgrade totals for those modes and lets players enter average clear time plus average currency payout per clear or session. Infinite Tower also has a floor-based Tower Token helper that sums floors 1 through your entered floor and accounts for Base Drops, +1 dropchance build, 2x Drops, or both.