How OSRS Prayer Drain Calc Works
To use the OSRS Prayer Drain Calc, enter your Prayer points and Prayer bonus, pick your active prayers, then read how long your Prayer points last.
- Enter your current Prayer points.
- Enter your equipment Prayer bonus.
- Pick your overhead prayer: none, a protection prayer or Smite.
- Pick your offensive prayer: none, a 1-skill prayer or Piety, Rigour or Augury.
- Turn Preserve on or off and read the uptime and drain per minute.
OSRS Prayer Drain Calc Formula
The OSRS Prayer Drain Calc formula is Uptime in minutes = Prayer points ÷ (base drain ÷ (1 + Prayer bonus ÷ 30)).
Base drain = sum of the drain of every active prayer, in points per minute
Real drain = base drain ÷ (1 + Prayer bonus ÷ 30)
Uptime = Prayer points ÷ real drain
- Protection prayers drain 20 points per minute.
- Smite drains 30 points per minute.
- Piety, Rigour and Augury drain 40 points per minute.
- Every +30 Prayer bonus doubles uptime.
OSRS Prayer Drain Calc FAQ
How long does Protect from Melee last in OSRS?
Protect from Melee lasts 3 minutes from 60 Prayer points with +0 Prayer bonus, at 20 points per minute.
How does Prayer bonus slow drain?
Prayer bonus slows drain by 1/30 of the base rate per point, so +30 bonus doubles how long prayers last.
How fast does Piety drain Prayer?
Piety drains 40 Prayer points per minute with +0 Prayer bonus, twice as fast as a protection prayer.
Does the calculator include prayer flicking?
No, the calculator does not include prayer flicking. It gives a continuous average for prayers kept on the whole time.