Interactive Prayer Drain Calculator — select your prayers, set your prayer bonus, and calculate duration and potion costs.
Select your active prayers, prayer level, equipment bonus, and restoration item to calculate drain rate and costs.
resistance = 60 + (2 × prayer bonus)Higher prayer bonus stretches every point further — it never changes the prayer's base drain rate.
Prayer potion restores 7 + 25% of your Prayer level per dose, super restore 8 + 25%, Sanfew serum 4 + 30%.
Running an offensive prayer alongside a protection prayer roughly doubles drain. Flick protection prayers to cut the cost.
👆 Enter your values above and click Calculate to get your personalized results.
Calculate exactly how long your prayer points will last and how many potions you need for any encounter. This calculator models OSRS prayer drain mechanics with full support for prayer bonus equipment, all protection and offensive prayers, and restoration item costs. or plan the whole grind with the OSRS construction calculator.
Different combat scenarios require different prayer strategies. Optimize your approach based on what you're doing.
Most bosses require Protection Prayers + Offensive Prayer. Protect from Melee + Piety drains 36 points/tick total. Plan 8-12 prayer potions per hour of bossing.
For Slayer, Protect from Melee + Piety is standard. Tasks with multiple monsters drain prayer faster since you're in combat longer. Prayer flicking can extend duration significantly.
Raids require sustained prayer usage across multiple bosses. Calculate total potion inventory needed for the entire raid — typically 6-10 Super Restores for Chambers of Xeric.
PvP requires fast prayer switching between protection prayers. Smite at drain rate 18 is expensive but essential for smiting opponents' +1 items.
For budget trips, consider using lower-tier prayers. Eagle Eye (drain 12) vs Rigour (drain 24) — Rigour drains twice as fast but provides better DPS. Calculate the cost difference.
For AFK Slayer or Nightmare Zone, minimize drain by using only essential prayers. Protect from Melee alone at drain 12 lasts much longer than stacking offensive prayers.
| Strategy | Total Drain | Duration (99 Prayer) | Potions/Hour | Cost/Hour |
|---|---|---|---|---|
| Protect Only | 12 | Long | 3-4 | ~28K GP |
| Protect + Piety | 36 | Medium | 8-10 | ~75K GP |
| Protect + Rigour | 36 | Medium | 8-10 | ~85K GP |
| Smite + Piety | 42 | Short | 10-12 | ~100K GP |
| Full Overhead + DPS | 48+ | Very Short | 12+ | ~120K GP |
Each prayer has a drain rate (1-24). Every game tick (0.6s), the total drain from all active prayers is accumulated. When enough drain accumulates, 1 prayer point is removed.
Prayer bonus equipment reduces drain speed. The formula uses 1 + floor(bonus / 30) as a resistance multiplier. At +30 prayer bonus, drain is halved. At +60, it's a third.
Low drain (1-3): Preserve, Rapid Restore, basic stat prayers. Medium drain (6-12): Protection prayers, intermediate combat prayers. High drain (18-24): Piety, Rigour, Augury, Smite.
Active prayers stack their drain rates additively. Protect from Melee (12) + Piety (24) = 36 total drain. Adding Preserve (+3) = 39 total drain.
Key breakpoints: +30 (2× resistance), +60 (3× resistance), +90 (4× resistance). Each 30-point increment provides another multiplier of drain resistance.
Advanced players can turn prayers on/off every tick to preserve prayer points. This reduces effective drain rate to near-zero but requires constant attention and precise timing.
Restores 7 + 25% of Prayer level per dose. At 99 Prayer = 31 points per dose. 4 doses per potion = 124 points total. Standard choice for most content.
Restores 8 + 25% of Prayer level per dose. At 99 Prayer = 32 points per dose. Also restores all stats. Slightly more per dose than Prayer Potions. Preferred for bossing.
Restores prayer AND cures poison, venom, and disease. 4 + 30% of Prayer level per dose. Lower prayer restore but multi-purpose. Expensive but saves inventory slots.
The Holy Wrench increases prayer restoration by ~25% when drinking potions. At 99 Prayer, a Prayer Potion restores 38 instead of 31 per dose. Takes one inventory slot but saves 2-3 potions per trip.
Proselyte armour provides +11 prayer bonus per piece. Full Proselyte set (+33 bonus) doubles prayer duration. Use for Slayer tasks where defence doesn't matter.
| Item | Restore/Dose (99 Pray) | GE Price | GP per Point | Best Use |
|---|---|---|---|---|
| Prayer Potion | 31 pts | ~7,500 GP | ~60 GP/pt | Standard choice |
| Super Restore | 32 pts | ~8,500 GP | ~66 GP/pt | Bossing (stats too) |
| Sanfew Serum | 33 pts | ~16,000 GP | ~121 GP/pt | Anti-venom needed |
| + Holy Wrench | +25% | N/A | Saves potions | Long trips |
Proselyte Sallet (+8), Verac's Helm (+3), Justiciar Faceguard (+4). Proselyte gives the highest prayer bonus but minimal defence.
Proselyte Hauberk (+8), Monk's Robe Top (+6). For DPS builds, Bandos Chestplate and Armadyl Chestplate both give +1.
Proselyte Cuisse (+6), Monk's Robe Bottom (+5). Bandos Tassets and Armadyl Chainskirt give +1.
Ardougne Cloak 4 (+6), Fire Cape (+2), Mythical Cape (+1). Ardougne Cloak is the best prayer bonus cape.
Dragonbone Necklace (+12, restores prayer from bone drops). Holy Symbol (+8). Both sacrifice DPS for prayer sustain.
Ring of the Gods (i) (+8), Explorer's Ring (+1). Ring of the Gods is the best prayer bonus ring but costs ~80M GP.
GWD bosses require Protection + Offensive prayers for 30-60 minute trips. Plan 8-12 Super Restores per trip. Minions also attack, increasing prayer drain pressure.
On-task prayer usage depends on monster aggression. AFK tasks with Protect from Melee drain ~5 potions/hour. Active Piety tasks drain 8-10/hour.
Raids require 6-10 Super Restores for a full run. Overloads and prayer potions are brewed during the raid. Plan prayer usage per boss room.
ToB requires precise prayer switching. Plan 6-8 Super Restores minimum. Verzik P3 requires constant prayer flicking to conserve points.
Bring extra prayer potions for PKer encounters. Smite costs 18 drain/tick — expensive but essential for protecting your +1 items.
NMZ with Protect from Melee only = extremely slow drain. A full prayer bar at 99 can last 8+ minutes with prayer bonus gear. Absorption is often preferred.
| Activity | Prayers Used | Drain/Tick | Pots/Hour | Cost/Hour |
|---|---|---|---|---|
| AFK Slayer | Protect Only | 12 | 3-4 | ~28K GP |
| Active Slayer | Protect + Piety | 36 | 8-10 | ~75K GP |
| GWD Bossing | Protect + Piety | 36 | 8-10 | ~85K GP |
| Raids | Variable | 24-48 | 6-10/raid | ~70K/raid |
| PvP | Smite + Piety | 42 | 10-12 | ~100K GP |
1-tick prayer flicking activates the prayer effect without draining points. Requires hitting the prayer button every game tick (0.6s). Perfect flicking = infinite prayer duration.
Turn prayer off between attacks. Only activate your protection/damage prayer when you or the monster attacks. Reduces drain by 50-70% with much less effort than 1-tick flicking.
Dragonbone Necklace restores prayer when burying bones. At tasks that drop bones (dragons, demons), this can sustain prayer without potions — saving significant GP.
Bonecrusher automatically buries bones. Combined with Dragonbone Necklace, this provides passive prayer restoration during combat — potentially eliminating potion usage on bone-dropping tasks.
Ancient Mace's special attack restores prayer points equal to damage dealt. In PvP, this can be used to restore prayer after smiting an opponent's item.
For tasks near a bank, POH Ornate Pool restores full prayer instantly. Teleporting home → pool → teleport back can be faster and cheaper than potions for nearby activities.