You can already guess that, by this point, you know that Prayer is one of the most expensive, time consuming and strategic skills in the game, having trained it in Old School RuneScape (OSRS) already. You need a good OSRS Prayer Calc(Prayer Calculator) to efficiently plan your trip, whether you want 43 Prayer for protection prayers, 70 Prayer, a huge grind to 99 Prayer.
But what is so important with it?
Since the GP-per-XP ratio of Prayer training is among the highest in OSRS. It may cost you millions of GP to make just one wrong decision, such as using the wrong bones, the wrong altar, or a wrong calculation of the XP.
What Is an OSRS Prayer Calc? (And Why Every Player Needs One)
The calculations an OSRS prayer calc does are:
The amount of XP required to get to your next desired level of Prayer.
The number of bones (and their type) required.
The price of the training will be under the existing GE prices.
The rates of XP hours and GP hours per XP according to the training method.
In short:
With a Prayer calculator, you know just how much GP and how many bones you need to get to the target level and this saves time and money.
Why OSRS Prayer Calcs Matter (Real Life 1).
Here’s a simple difference:
Using Regular Bones to 70 Prayer = -15 hours + 3.5M XP required.
Application of Dragon Bones on a Gilded Altar = 30-40 minutes + significantly fewer bones are required.
In case of a wrong calculation, you may:
Overbuy bones – lose money
Under buy bones – travel time of waste.
Select (choose) sluggish or costly techniques without knowing.
This is why the veteran OSRS players, especially within the gaming communities of the United Kingdom and the United States, will never train without using a proper Prayer calculator.
How Prayer XP Works in OSRS
To use any calculator, it is vital to know the values of XP.
Here’s a quick table:
| Bone Type | Base XP | Gilded Altar (2 Burners) | Chaos Altar (Mean XP per Bone) |
| Normal Bones | 2 XP | 18 XP | 17 XP (50% chance of bone sparing) |
| Big Bones | 15 XP | 90 XP | ~120 XP |
| Dragon Bones | 72 XP | 252 XP | ~378 XP |
| Wyvern Bones | 72 XP | 252 XP | ~378 XP |
| Dagannoth Bones | 125 XP | 437.5 XP | ~656 XP |
| Superior Bones | 150 XP | 525 XP | ~788 XP |
The Chaos Altar is the most efficient in terms of XP because it has a 50 percent bone-saving mechanic- however, it is the most hazardous.
How an OSRS Prayer Calc Works (Demonstrated in a Simple Way).
All that is required by a Prayer Calculator is two inputs:
1. Your Current Prayer Level
2. Your Target Level
It calculates using OSRS XP curves:
Total XP needed
Bones required (according to XP/bone)
GP cost (based on GE prices)
Time estimate (optional)
Example:
Level 43 -70 prayer with Dragon Bones upon Gilded Alter.
XP needed: 166,636 XP
Dragon bone (Gilded Altar): 252 XP.
Bones needed: 166,636 / 252 [?] 662 bones
If bones cost 3,000 GP each – 662 x 3,000 = 1.986M GP
All this is automated immediately by most OSRS prayer calcs.
Level specifications of OSRS Prayer XP.
The following are just a few examples of popular goal levels.
Level Total XP Required
1 – 43 37,224 XP
1 – 52 103,238 XP
1 – 70 737,627 XP
1 – 77 1,210,421 XP
1 – 80 1,986,088 XP
1 – 92 6,517,253 XP
1 – 99 13,034,431 XP
| Bone Type | Notes | Cost Level | XP Quality | Best Use |
| Regular Bones | Good at lower levels but very poor XP | Super Cheap | Poor XP | Novice budget training |
| Big Bones | Affordable but still slow, used by Ironmen | Cheap | Low–Medium XP | Early to mid training |
| Dragon Bones | Most popular, great balance of cost + XP | Moderate | High XP | 43–70 or 70–99 on Gilded/Chaos Altar |
| Wyvern Bones | Similar XP to Dragon Bones | Varies (sometimes expensive) | High XP | General training |
| Dagannoth Bones | High XP, strong option | Expensive | Very High XP | Best at Chaos Altar |
| Superior Dragon Bones | Highest XP in the game | Premium | Extremely High XP | Fastest possible XP |
Best very fast 99 Prayer.
It is advisable Best Training Methods (with Cost & XP Comparison).
The Gilded Altar in a Player-Owned House (POH).
XP Bonus: x3 in contrast to burying.
Safety: Completely safe
Cost: High but predictable
XP/hr: 400K-550K
Comparison Table
| Method | XP Bonus | XP/hr | Cost | Risk | Pros | Cons | Extra Tips |
| Gilded Altar | 3.5x burial XP (standard altar bonus) | 300K–550K | Medium–High | None | Fast, Popular, AFK-friendly, No risk | Still expensive | — |
| Chaos Altar (Wilderness) | Same as Gilded Altar + 50% chance bones are not consumed | 450K–650K | Lowest (bones last longer) | High (PKers) | Lowest cost, Highest XP/hr in game | High risk | UK/USA: Use low-population worlds during off-peak hours |
| Ectofuntus | 4x burial XP | 100K–180K | Very Low | None | Very cheap, Great for Ironmen | Extremely slow, Click-intensive | — |
How To Use an OSRS Prayer Calc (Step-by-Step).
The most basic universal approach would be as follows:
| Step | Description |
| Step 1 | Fill in your current level (e.g. Level 54) |
| Step 2 | Enter your target level (e.g. Level 70) |
| Step 3 | Choose bone type (Dagannoth Bones, Dragon Bones, etc.) |
| Step 4 | Choose method (Gilded Altar, Chaos Altar, Ectofuntus, Burying) |
| Step 5 | Evaluate obtained results: Bones needed, Total GP cost, XP gained, Time estimate |
| Step 6 | Adjust based on budget and try different bone types until the price fits your GP |
Examples: Calc Real Prayer (At the popular level goals).
Example 1: 43 -70 Dragon Bones (Gilded Altar) Prayer.
XP needed: 166,636
With 252 XP per bone:
Bones needed: 662
If dragon bones = 3,000 GP:
Total cost: 1.98M GP
Example 2: 70 -99: Prayer with Dragon Bones (Chaos Altar)
XP needed: 6,517,253
Chaos altar XP per bone (avg): 378 XP
Bones needed: ~17,240
If bones = 3,000 GP each:
Total cost: 51.7M GP
True price when 50% of the bones are saved: [?]26M GP.
Example 3: Budget Technique (Big Bones – 70)
Big bones XP (gilded): 90 XP
XP needed: 166,636
Bones needed: 1,852
At 300 GP each = 556K GP
Best OSRS Prayer Training Strategy (Novice to Max)
Prayer Training Levels & Methods
| Level Range | Recommended Method | Notes |
| 1–43 | Big Bones / Dragon Bones / Ensouled Heads | Goal: Unlock overhead protection prayers |
| 43–70 | Dragon/Wyvern Bones on Gilded or Chaos Altar | Unlock Piety, Rigour, Augury |
| 70–92 | Dragon Bones / Regular Bone XP | Bones give around 50 XP |
| 92–99 | Superior Dragon Bones | Fastest XP, best savings at Chaos Altar |
Prayer Training Cost Estimates (2025 Example Prices)
| Method | Cost to 70 | Cost to 99 |
| Regular Bones | 2M+ | 30M+ |
| Big Bones | 600K | 18M |
| Dragon Bones (Gilded) | 2M | 80M |
| Dragon Bones (Chaos) | 1M | 35–45M |
| Superior Bones (Gilded) | 4M | 150M+ |
| Superior Bones (Chaos) | 2.1M | 70–80M |
Holy Scriptures: Tips to Save Millions on Prayer Training
| Tip | Description |
| Train at Chaos Altar off-peak | Fewer PKers at UK night / US evening |
| Buy bones during low market hours | Cheapest on Monday mornings, after bossing weekends, after big updates |
| Use POH Host World | Main Gilded Altar hub: World 330 |
| Use Runelite Inventory Setup Plugins | Boosts XP/hr |
| Use Ensouled Heads | Dragon & Bloodveld are cost-effective |
Common Mistakes to Avoid
| Mistake |
| Using regular bones past level 20 |
| Not price checking before training |
| Carrying too many bones into Wilderness |
| Forgetting anti-PK gear + teleport tabs |
| Ignoring XP boosters (like Kandarin Diary for Ectofuntus) |
Conclusion: Reasons an OSRS Prayer Calc Is Necessary.
In case you wish to level Prayer, safely, and cheaply, then an OSRS Prayer Calc is a must. It tells you:
The cheapest method
Fastest XP method
Exact bones needed
Total GP cost
Time required
Optimum training plans on a low budget.
Whether you are a low-level player who wants to get Protect from Melee or a high-level account and are grinding 99 Prayer, you will never spend at least a moment or a GP with a Prayer calculator.
Whatever you prefer, Gilded Altar, Chaos Altar or Ectofuntus, planning ahead is the key to intelligent and successful Prayer training.
FAQs About OSRS Prayer Calc
How to train Prayer, the cheapest way?
Dragon or Dagannoth Bones on Chaos Altar (50% bone savings).
What’s the fastest XP method?
Chaos Altar Superior Dragon Bones.
What is the number of Dragon Bones that I must take to have 99 Prayer?
Approximately 17K (Gilded), or 8.5K effective (Chaos Altar).
Is the Chaos Altar worth it?
Yes–if you’re careful. It saves Prayer expenses by almost fifty percent.
Better than bones ensouled Heads?
They are slower and cheaper to the middle level players.
