Prayer Calculator
Pick a bone (or ensouled head) and an altar setup, enter your current Prayer XP and a target level, and see how many bones it takes.
XP per bone (with altar)
252.0
XP for level 70
737,627
Bones needed
2,525
How it's calculated
XP per bone = base bone XP × altar multiplier
bones needed = ceil( (XP for target level − current XP) / XP per bone )
Worked example
The calculator's own defaults: 101,333 Prayer XP, using Dragon bones (72 base xp) at a Gilded altar (both burners lit) (3.5x), targeting level 70.
| XP per bone at this altar | 252.0 |
| XP required for level 70 | 737,627 |
| XP still needed | 636,294 |
| Bones needed | 2,525 |
Frequently Asked Questions
How does an altar multiply bone XP?
Each bone or ensouled head has a fixed base XP value. Burying it (or using it with no altar) gives that base value; using it at an altar instead multiplies it by that altar's bonus, which stacks higher with lit incense burners at a player-owned house's Gilded altar. xp per bone = base bone XP x altar multiplier.
How many bones do I need for a target level?
bones needed = ceil( (XP for target level - current XP) / (base bone XP x altar multiplier) ) -- the same actions-needed formula used across every training calculator on this site, applied to Prayer's XP-per-bone number instead of an XP-per-action number.
Are the altar multipliers and bone XP values exact?
They're a small, typed-from-memory preset list covering the most common bones and altar setups, clearly labelled approximate. Exact multipliers depend on which house bonuses you have active; confirm the real numbers in-game if you're planning something that matters.
Max Hit Calc is a set of fan-made calculators built from the game's published combat and experience formulas, not affiliated with, endorsed by, or operated on behalf of Jagex Ltd. Old School RuneScape is a trademark of Jagex Ltd. Any preset gear, monster or action values above are typed from general knowledge of the game and are approximate -- verify the current figure in-game before relying on it. See the Terms.