OSRS Calculators
A tidy set of Old School RuneScape calculators — combat level, drop-rate dry calc, melee max hit, Prayer bones and skill XP — all running privately in your browser.
OSRS Calculators
Every calculator runs entirely in your browser. 🔒 No signup, nothing uploaded.
🔒 Nothing you enter is sent anywhere or stored. All processing happens in your browser.
Features
Five core calculators
Combat level, dry (drop-rate), max hit, Prayer and XP — the ones you actually use, in one place.
Real in-game formulas
Each calculator uses the official OSRS maths, verified against known values.
Private and free
Everything runs in your browser with no signup and nothing uploaded.
Works on phone
Use them on mobile while you play or plan.
How it works — in four simple steps
No signup, nothing to install — it all runs in your browser.
Pick a calculator
Choose combat, dry, max hit, Prayer or XP from the links above.
Enter your numbers
Each tool takes a few simple inputs.
Get your answer instantly
Results update as you type.
Plan your account
Combine them to plan builds, grinds and goals.
How it works
Old School RuneScape runs on numbers — combat levels, drop rates, max hits, XP to 99 — and this is a tidy home for the calculators you reach for most. Each one uses the game's real formulas and runs entirely in your browser, so there's no signup and nothing to install.
Use the combat calculator to plan a pure or a main, the dry calculator to see how unlucky you really are on a drop, the max hit calculator to compare melee gear, the Prayer calculator to count the bones to your goal, and the XP calculator to plan any grind to 99.