Old School RuneScape
- Barrows chest EV & unique drop rates
- GPH with KC, teleport & supply costs
- Cumulative probability curves
Updated for 2025 Season Content
LootCalc: Master Your RNG & Drop Rates
Advanced drop rate, expected value (EV), and gold per hour (GPH) calculators for the world's biggest RPGs. New: Chaos Zero Nightmare Save Data tools for Faint Memory caps, deck builds, and A/B/C team tracking.
Why Serious Gamers Choose LootCalc
In a sea of ad-filled, outdated wikis and "guesstimate" blogs, LootCalc stands apart. We build precision tools for players who demand accuracy, transparency, and respect.
Transparent, Reproducible Math
We believe you shouldn't have to trust a "black box." Every calculator on LootCalc is built on open methodologies. We explicitly state our formulas, data sources, and assumptions right on the page. Whether it's the binomial distribution behind our drop rate calculators or the expected value (EV) logic in our loot tables, we show our work.
This transparency allows the community to audit our tools. If a game patch changes a drop rate from 1/50 to 1/45, you'll see that reflected in our changelogs and updated formulas immediately—not months later. We treat gaming math as a science, not a secret sauce.
Data-Driven, Not Anecdotal
"I got it in 5 kills, so the rate must be high!" — We've all heard this, and we ignore it. LootCalc relies on statistically significant datasets. We aggregate data from official developer APIs, verified wiki crowdsourcing, and large-scale player logs (often 10,000+ samples) to determine true drop rates.
For games like OSRS and WoW, we cross-reference our models with simulation tools to ensure our "Gold Per Hour" and "Time to Complete" estimates account for real-world variance, not just theoretical maximums. When you plan a grind with LootCalc, you're planning with reality.
User Experience First (No Ad Spam)
We built LootCalc because we were tired of "calculator" sites that are 90% ads and 10% content. Our philosophy is simple: the tool comes first. You will never find auto-playing video ads, pop-ups that block the interface, or "next page" buttons that exist only to serve more impressions.
Our layout is clean, responsive, and dark-mode native. We optimize for performance, ensuring calculators load instantly even on mobile connections. We respect your time and your attention span. If we run ads, they are non-intrusive and clearly separated from the content.
Built by Veterans, For Veterans
LootCalc is developed by players with over 15 years of experience in the MMO and ARPG genres. We understand the nuances of "bad luck protection," "pity timers," and "diminishing returns" because we face them in-game just like you.
We don't just scrape data; we interpret it. Our guides explain *why* a farming strategy works, not just *what* to kill. We provide context on market trends, patch history, and meta shifts, giving you the strategic edge to optimize your playtime efficiently.
The LootCalc Standard
Every tool we publish must meet our rigorous quality checklist before it goes live.
Verified Formulas
Double-checked against game code and community research.
Real-Time Math
Calculations happen instantly in your browser, no server lag.
Live Market Data
OSRS & WoW prices update automatically via API integrations.
Privacy Focused
We don't sell your data. No account required to use tools.
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, Warframe Relic farming, Escape from Tarkov loot spawns, Borderlands 3 legendary drops, and more.
Chaos Zero Nightmare
- Save Data / Faint Memory cap checker
- Per-card deck builder with Epiphany/Divine
- A/B/C team tracker with ladder costs
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
Final Fantasy XIV
- Loot council, DKP, EPGP probability
- Dawntrail raid timeline planner
- Tomestone cap tracker & overflow alerts
Apex Legends
- Pack probability & seasonal boosts
- Heirloom tracker with loot ticks
- Battle pass refund & bundle planner
Raid Shadow Legends
- Ancient/Void/Sacred shard mercy tracking
- Custom pity logic & budget planner
- Drop probability & guarantee timelines
RSL Void Shard Hub
- Void exclusive probability curves
- 2x/10x purchase window analysis
- Mercy tracker & budget planner
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
Minecraft
- Chest loot probability & farming efficiency
- Ancient debris & wither skeleton skull rates
- Expected attempts & cumulative probability
Borderlands 3
- Legendary drop probability & Mayhem scaling
- Dedicated vs world drop farming efficiency
- Anointment hunting & expected kill calculations
Escape from Tarkov
- Loot spawn rates & container probability
- Boss spawn chances & key drop rates
- Labs loot efficiency & EV per raid
Elden Ring
- Drop rate scaling with Discovery stat
- Arcane build optimization & Silver Scarab
- Expected farming time for rare items
Monument Valley 3
- 100% completion & collectible calculator
- Spoiler-safe achievement tracker
- Route planner & time estimator
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.
Calculating Expected Returns
Our EV calculations account for weighted probabilities across all possible outcomes, including multiple loot tables, bonus rolls, and conditional drops triggered by specific game states.
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.
Time Efficiency Analysis
Time tracking includes travel, setup, combat duration, and downtime between runs. We factor in consumable costs, repair fees, and opportunity costs to show true profit per hour.
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:
MMORPG Data Collection
- OSRS: Official OSRS Wiki drop tables & Grand Exchange prices
- World of Warcraft: Blizzard blue posts, patch notes, season documentation & vetted theorycrafting
Wiki Cross-Referencing
We cross-verify OSRS drop rates against crowdsourced loot logs and WoW data against multiple theorycrafting communities before updating calculators.
ARPG & Gacha Systems
- 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
Patch Monitoring
We monitor official patch notes and developer statements within hours of release, updating affected calculators the same day mechanical changes go live.
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.
💰
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 →Chaos Zero Nightmare Save Data Calculators (Hub + 3 tools)
New FeatureNew CZN hub with Save Data cap checker, card-level deck builder, and A/B/C team tracker. Uses community-standard rules: tier caps 30→150 (+10 Nightmare), card costs 20/20/80, Epiphany +10, Divine +20 on top, conversion +10, removal/duplication ladder 0→10→30→50→70, base-card removal +20.
Genshin Impact Wish Pity System Guide 2025
New GuideMaster Genshin's wish pity system with comprehensive analysis of soft pity mechanics, 5-star probability curves, 50/50 guarantee system, and primogem optimization for F2P and whales.
Warframe Relic Farming & Refinement Guide 2025
New GuideOptimize Warframe relic farming with comprehensive refinement tier analysis, best-of-squad mechanics, void trace efficiency, and platinum per hour strategies.
Minecraft Loot Table & Chest Farming Guide 2025
New GuideMaster Minecraft loot farming with loot table analysis, chest probability calculations, fishing optimization, and enchantment efficiency strategies for diamonds and rare items.
Borderlands 3 Legendary Farming Guide 2025
New GuideOptimize Borderlands 3 legendary farming with Mayhem 10/11 scaling analysis, dedicated drop sources, anointment probability, and boss route efficiency for max loot.
Escape from Tarkov Loot Optimization Guide 2025
New GuideMaster EFT loot farming with spawn rate analysis, boss farming strategies, map-specific routes, and risk-adjusted expected value calculations for profitable raids.
Elden Ring Drop Rate & Discovery Guide 2025
New GuideOptimize Elden Ring item farming with Discovery stat scaling, Arcane build optimization, rare weapon drop rates like Magma Blade, and farming route efficiency.
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.