# MMORPG Boss Practice Sims and Calculators

Updated October 12, 2026

Practice famous MMORPG boss mechanics in your browser, then plan your grind with game-specific calculators. Covers Final Fantasy XIV, Lost Ark, Old School RuneScape, World of Warcraft, Black Desert Online, Guild Wars 2, ESO, and New World. Free, no account, no downloads.

## Boss Practice Sims

Interactive simulations of real boss fights. Learn the mechanics before your first pull: dodge telegraphs, bait AoEs, and practice positioning with zero repair bills.

### Final Fantasy XIV

- [**Titan Extreme Practice**Dodge Landslide lines, bait Weight of the Land, and handle Geocrush falloff in the FFXIV trial.](/titan-ex-boss-sim-game/)
- [**Ifrit Extreme Practice**Bait Eruption circles, track Ifrit's dashes, and manage Searing Wind in the FFXIV trial.](/ifrit-ex-boss-sim-game/)
- [**Leviathan Extreme Practice**Dodge Body Slam geysers, handle Dreadstorm pools, and survive Tidal Wave in the Whorleater trial.](/leviathan-ex-boss-sim-game/)
- [**Shiva Extreme Practice**Whiteout donut, Heavenly Strike knockback, Glass Dance cone, and Avalanche lines in the Akh Afah Amphitheatre.](/shiva-ex-boss-sim-game/)

### Lost Ark

- [**Valtan Gate 2 Practice**The axe slam cross, cone shockwave swings, and memory pizza telegraphs in Lost Ark.](/valtan-gate-2-boss-sim-game/)

### Old School RuneScape

- [**Zulrah Practice**The snake boss's deterministic phase rotation and pillar attacks in OSRS.](/zulrah-boss-sim-game/)

### World of Warcraft

- [**Ulgrax the Devourer Practice**Swirlies, slowing webs, Digestive Acid baits, and the Carnivorous Contest group soak in Nerub-ar Palace.](/ulgrax-boss-sim-game/)

## MMORPG Calculators

Plan the grind: XP, drop odds, honing, enhancing, and profits. All math runs in your browser.

### Old School RuneScape

- [**OSRS XP Calculator**XP needed to reach your target level, and XP remaining, for every skill.](/osrs-xp-calculator/)
- [**OSRS Drop Rate Calculator**Your chance of landing a rare drop over any number of kills.](/osrs-drop-rate-calculator/)
- [**OSRS GP per Hour Calculator**Estimate profit per hour from loot, kills, and supply costs.](/osrs-gp-per-hour-calculator/)

### World of Warcraft

- [**WoW Time to Level Calculator**How long to the level cap at your hourly XP rate.](/wow-time-to-level-calculator/)

### Final Fantasy XIV

- [**FFXIV Materia Melding Calculator**Melding success odds and expected materia cost for each forbidden slot.](/ffxiv-materia-melding-calculator/)

### Lost Ark

- [**Lost Ark Honing Calculator**Expected taps and material cost to reach your honing target.](/lost-ark-honing-calculator/)

### Black Desert Online

- [**BDO Enhancement Calculator**Enhancement chances and failstack breakpoints by enhancement level.](/bdo-enhancement-calculator/)

### Guild Wars 2

- [**GW2 Crafting Profit Calculator**Buy and sell margins on crafted items after trading post fees.](/gw2-crafting-profit-calculator/)

### The Elder Scrolls Online

- [**ESO Champion Points Calculator**Plan your champion point allocation across the three constellations.](/eso-champion-points-calculator/)

### New World

- [**New World Crafting Calculator**Materials needed to level each trade skill to your target.](/new-world-crafting-calculator/)

## Community-made open source tools

Beyond our own sims and calculators, players build excellent open source MMORPG tools: log parsers, overlays, gear planners, and market trackers. We verified the licenses and listed the best in our [open source MMORPG tools directory](/open-source-mmorpg-tools/).

## Frequently asked questions

### What is a boss practice sim?

A boss practice sim is a free browser simulation of a famous MMORPG boss fight. It recreates the boss's real telegraphs and mechanics, such as line AoEs, baited circles, and stack markers, so you can practice dodging and positioning before you face the real fight with your party.

### Are these sims official tools from the game publishers?

No. These are fan-made practice tools built from publicly documented fight mechanics. They are not affiliated with or endorsed by Square Enix, Smilegate, Jagex, Blizzard, Pearl Abyss, ArenaNet, ZeniMax, or Amazon Games.

### Which games are covered?

The hub covers Final Fantasy XIV, Lost Ark, Old School RuneScape, World of Warcraft, Black Desert Online, Guild Wars 2, The Elder Scrolls Online, and New World, with boss sims for FFXIV, Lost Ark, OSRS, and WoW plus calculators for all eight games.

### Do the sims need downloads or accounts?

No. Every sim and calculator runs entirely in your browser. Nothing to install, no account to create, and your progress never leaves your device.

### How accurate are the calculators?

Each calculator uses the rates and formulas the game community has verified, and every page says when the numbers were last checked. Game patches change rates, so that date matters. Always sanity-check against current guides.

### Are these tools free?

Yes. All sims and calculators are free forever, with no accounts, no limits, and no downloads.