게임

How do I calculate expected attempts for a rare item drop?

For an item with drop rate p, the expected number of attempts is 1/p (geometric distribution). For a 1% drop rate, expect ~100 attempts. However, the probability of getting at least one drop in n attempts is: 1 − (1 − p)^n. For 100 attempts at 1%: 1 − 0.99^100 ≈ 63.4%. To reach 99% confidence, you need approximately 459 attempts.

이 계산기의 산출 결과는 정확한가요? (2)

Most RPGs use one of three damage models: (1) Flat reduction: damage = attack − defense, (2) Percentage reduction: damage = attack × (1 − defense%), (3) Division formula: damage = attack² / (attack + defense). Critical hits multiply base damage by a crit multiplier (typically 1.5×–2×). Our damage calculator supports all three models with configurable modifiers.

이 계산기의 산출 결과는 정확한가요? (3)

Common XP curve formulas: (1) Linear: XP(n) = a × n, (2) Polynomial: XP(n) = a × n^b (Pokémon uses n³), (3) Exponential: XP(n) = a × b^n (many MMORPGs). Polynomial curves provide smooth progression; exponential curves create meaningful endgame grinding. The key is balancing time-per-level to maintain player engagement without frustration.

이 계산기의 산출 결과는 정확한가요? (4)

A balanced crafting system ensures that: (1) crafted items are comparable to loot drops at the same level, (2) material costs scale with item power, (3) rare recipes provide meaningful advantages without being pay-to-win, and (4) gathering time aligns with player expectations. Use our synthesis calculator to model material input/output ratios and verify economic balance.

Can I use these calculators for tabletop RPGs like D&D?

Absolutely. Our damage calculator maps directly to D&D 5e mechanics (attack rolls, saving throws, advantage/disadvantage). The probability calculator handles dice distributions (d4, d6, d8, d10, d12, d20). The experience system calculator can model milestone vs. XP-based leveling. Many tabletop GMs use these tools to balance encounters and design homebrew mechanics.