Old School RuneScape
- Barrows chest EV & unique drop rates
- GPH with KC, teleport & supply costs
- Cumulative probability curves
Loot Drop & Profit Calculators — EV, GPH & Route Math
Compare drop rates, expected value (EV), and gold per hour (GPH) across farming routes. Turn EV into time-normalized profit, reduce travel waste, and set rational expectations for variance and dry streaks.
OSRS Barrows
Calculate EV, unique drop rates, and GPH for Barrows chest runs
Open calculator →WoW Delves
Optimize vault tiers, bountiful coffer rewards, and time per tier
Open calculator →PoE Currency
Map returns, scarab cost-benefit, and currency profit per hour
Open calculator →D4 Helltide
Mystery chest EV, material costs, and cinders-to-loot efficiency
Open calculator →Supported Games & Tools
One platform to compare EV, travel time penalties, and route density across OSRS, WoW Delves, Diablo 4 Helltide, Path of Exile mapping, and Warframe Relic farming.
World of Warcraft
- Delves tier rewards & vault thresholds
- Bountiful coffer optimization
- Time-per-tier GPH comparisons
Diablo IV
- Mystery chest EV & material costs
- Cinders-to-loot efficiency
- Route density optimization
Path of Exile
- Map returns & scarab cost-benefit
- Currency profit per hour
- League mechanic efficiency
Warframe
- Radiant/Flawless/Exceptional/Intact odds
- Squad best-of-N selection boost
- Platinum EV per relic opened
Lost Ark
- Honing success probability & artisan energy
- Expected materials & gold cost per level
- Solar Blessing optimization analysis
Destiny 2
- Raid exotic drop probability & BLP tracking
- Vex Mythoclast & Eyes of Tomorrow rates
- Weekly vs farmable mode optimization
Featured Guides
Master loot farming with our comprehensive optimization guides covering EV calculations, GPH strategies, and profit maximization.
Beginner
Getting Started with LootCalc
Learn the fundamentals of EV, GPH, and drop rate optimization. Perfect for beginners.
Read Guide
OSRS
OSRS Barrows Complete Guide
Master Barrows farming with drop rates, EV calculations, and optimal routes.
Read Guide
WoW
WoW Delves Optimization
Optimize tier selection and vault thresholds for maximum efficiency.
Read Guide
PoE
PoE Currency Profit Guide
Maximize atlas strategies and scarab selection for peak profitability.
Read Guide
How Our Math Works: EV, GPH & Variance
LootCalc brings rigorous probability theory to loot optimization. We transform drop tables and probability distributions into actionable metrics, helping you maximize farming efficiency across multiple games.
Expected Value (EV)
Expected Value answers: "How much is this loot worth on average per attempt?" It's calculated by multiplying each possible drop's value by its probability, then summing everything together. For example, if a chest has a 10% chance to drop a 100,000 gold item and a 90% chance to drop 5,000 gold, the EV is (0.10 × 100,000) + (0.90 × 5,000) = 14,500 gold per chest. EV represents your long-term average—not every single run, but what to expect over hundreds of attempts.
Gold Per Hour (GPH)
Gold Per Hour factors in time investment and costs. If that 14,500 gold chest takes 10 minutes and costs 2,000 gold in supplies, your net profit is 12,500 per run, or 75,000 gold/hour (6 runs × 12,500). GPH lets you compare completely different activities—raiding vs delves, bossing vs gathering—on an apples-to-apples basis.
Variance & RNG
Variance measures how much results swing around EV. High-variance activities (like hunting a 1-in-512 rare drop) feel feast-or-famine: hundreds of runs dry, then multiple drops in quick succession. Low-variance activities smooth out the experience with many small consistent drops. Our calculators show cumulative probability curves so you see not just the average case, but the likelihood of hitting your target within a specific number of attempts.
Data Sources & Verification
Accurate calculations demand accurate data. We source from authoritative channels and cross-reference multiple sources:
- OSRS: Official OSRS Wiki drop tables & Grand Exchange prices
- World of Warcraft: Blizzard blue posts, patch notes, season documentation & vetted theorycrafting
- Diablo 4: Official game data files, patch notes & community testing (Maxroll, etc.)
- Path of Exile: Official GGG statements combined with poe.ninja data & bulk trade analysis
- Genshin Impact: Official miHoYo probability rates with community pity verification
Mathematical Models & Transparency
Our models use binomial distributions for independent events and union probability for mutually exclusive outcomes. Every calculator includes adjustable parameters—customize market prices, clear times, and costs to match your server and playstyle. Configuration URLs are shareable for comparing setups with friends or linking in guides.
Read our methodology: Drop Math: EV, Union Probability & Binomial and Drop Rate Math: EV vs GPH vs Variance.
LootCalc is a fan-made project not affiliated with or endorsed by Jagex, Blizzard Entertainment, Grinding Gear Games, miHoYo, or any game developer. All game content and trademarks are property of their respective owners. See our fan-made disclaimer.
Calculator Features
Every calculator includes powerful features to help you optimize farming routes, set realistic expectations, and maximize profit.
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Shareable Configuration URLs
Every calculation generates a unique URL. Bookmark your setup, share with friends, or link in guides and discussions.
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Custom Market Prices
Override default prices to match your server or realm. Prices update with Grand Exchange and auction house data.
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Cumulative Probability Charts
Visualize your odds of hitting a drop within N attempts. Set realistic goals and understand dry streak likelihood.
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Cost Tracking & Net Profit
Factor in teleports, consumables, repairs, and travel time. See true profit after all expenses.
Recent Updates & Guides
View all →Drop Math: EV, Union Probability & Binomial
GuideDeep dive into the probability theory behind our calculators. Learn how we combine binomial distributions and union probability to calculate accurate drop rates across multiple attempts and loot sources.
Drop Rate Math: EV vs GPH vs Variance
GuideUnderstand the three core metrics: Expected Value for long-term averages, GPH for time-normalized profit, and Variance for setting realistic expectations about dry streaks and lucky runs.
WoW Delves Tiers, Vault Thresholds & GPH
GuideComplete guide to optimizing WoW Delves farming. Covers tier rewards, bountiful coffer thresholds, vault unlocks, and time-per-tier GPH calculations for The War Within Season 1.
OSRS Barrows EV, Unique Odds & GPH
GuideComprehensive analysis of Barrows chest mechanics. Calculate EV from brother-specific uniques, understand KC thresholds, factor in teleport and supply costs, and maximize your GPH.
Loot Calculator Optimization Guide 2025
GuideMaster advanced strategies for optimizing farming routes across multiple games. Learn how to balance EV, GPH, and variance to maximize long-term profit and minimize wasted time.
Frequently Asked Questions
LootCalc uses the most up-to-date drop rate data and market values to provide highly accurate calculations. However, please note that actual results may vary due to in-game randomness.