Free OSRS Calculators for Old School RuneScape

Equip any gear to see your accuracy, max hit and XP per hour, and how long the crab takes to reach your target level.

Simulate resource output, favour decay and coffer spend, with a worker-assignment map and live Grand Exchange prices.

Compare every fur by XP per golem, cost and time to your target Crafting level, or value your banked fur.

Pick the rewards you want and see the points, time and Magic XP needed in each room.

Work out how many contracts you need for a Construction goal, plus supplies used and Supply Crate loot.

Simulate loot for any number of completions and check your odds of rare drops like crystal seeds and Youngllef.

Recent updates

24 Sep 2026UpdateLoot calculators: every item in the loot tables now shows its live Grand Exchange and High Alchemy value, and clicking an item opens its OSRS Wiki page. Available in Corrupted Gauntlet, Managing Miscellania, Mahogany Homes and Golem Crafting.
24 Sep 2026NewGemstone Crab calculator: pick any gear, prayer and potion to see your accuracy, max hit and damage per hour against the Gemstone Crab, plus how long you need to reach your target level.
23 Sep 2026UpdateAll calculators: a new guide section with quick facts and FAQs.
23 Sep 2026NewFive calculators launched: Managing Miscellania, Golem Crafting, Mage Training Arena, Mahogany Homes and Corrupted Gauntlet.