OSRS Combat Calculator — Combat Level, DPS & Prayer Drain

Calculate your Old School RuneScape combat level, weapon DPS, and prayer point drain time — three combat tools in one calculator.

July 3, 2026

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Reference Values

Last verified: Jul 2, 2026

Category	Range	What It Means	Status
Combat level base	0.25 × (Defence + Hitpoints + ⌊Prayer÷2⌋)	Added to whichever combat style contributes the most.	Good
Melee contribution	0.325 × (Attack + Strength)		Good
Ranged contribution	0.325 × ⌊Ranged × 1.5⌋		Good
Magic contribution	0.325 × ⌊Magic × 1.5⌋		Good
DPS formula	(Accuracy × Max Hit ÷ 2) ÷ (Attack Speed × 0.6)	Attack speed in game ticks (0.6s each); Accuracy as a decimal 0–1.	Good
Piety / Rigour / Augury drain	24 points/min (base)	The strongest combat prayers, one per style — highest base drain rate of common prayers.	Poor
Protect from Melee/Missiles/Magic drain	12 points/min (base)		Okay
Preserve drain ★	2 points/min (base)	Slows natural prayer point decay from other active prayers rather than draining on its own.	★ Best

Source: Combat level and DPS formulas per the OSRS Wiki (Combat level, Combat pages). Prayer drain rates are community-published base values (before Prayer bonus reduction) commonly referenced from the OSRS Wiki Prayer page.

Worked Examples

Maxed Combat Level

Attack: 99
Strength: 99
Defence: 99
Hitpoints: 99
Prayer: 99
Ranged: 99
Magic: 99

Combat level 126

Base = 0.25×(99+99+49) = 61.75. Melee = 0.325×(99+99) = 64.35. Ranged/Magic = 0.325×148 = 48.1. Highest is Melee: 61.75+64.35 = 126.1 → 126.

Pure Ranged Build

Attack: 1
Strength: 1
Defence: 1
Hitpoints: 70
Prayer: 43
Ranged: 99
Magic: 1

Combat level 71

Base = 0.25×(1+70+21) = 23.0. Ranged = 0.325×⌊99×1.5⌋ = 0.325×148 = 48.1 (highest of melee/ranged/magic). Combined = 23+48.1 = 71.1 → 71. Low Defence and Hitpoints keep the combat level well below a maxed account's 126 despite 99 Ranged.

DPS with a Fast Weapon

Accuracy: 0.85
Max Hit: 40
Attack Speed: 4 ticks

≈7.08 DPS

(0.85 × 40 ÷ 2) ÷ (4 × 0.6) = 17 ÷ 2.4 = 7.08 damage per second.

Piety Drain Time

Prayer Points: 70
Active Prayer: Piety (24/min base)
Prayer Bonus: +15

≈4.4 minutes

Effective drain ≈ 24 ÷ (1 + 15/30) = 16/min. 70 ÷ 16 ≈ 4.4 minutes before prayer points run out.

How to Use This Calculator

1

Choose a mode

Combat Level, DPS, or Prayer Drain — each is an independent calculator.
2

For Combat Level: enter your 7 combat stats

Attack, Strength, Defence, Hitpoints, Prayer, Ranged, and Magic.
3

For DPS: enter accuracy, max hit, and attack speed

Find these from your gear setup via the OSRS Wiki or a gear calculator.
4

For Prayer Drain: select your active prayer and enter points + prayer bonus

Shows estimated minutes until prayer points run out.

What Each Value Means

Combat Level (level): OSRS's single overall combat rating (1–126), calculated from all seven combat-related skills, weighted so only the strongest combat style counts toward the top contribution.
DPS (Damage Per Second) (damage/sec): Average expected damage output per second, factoring in hit accuracy, maximum hit, and weapon attack speed.
Prayer Drain Rate (points/min): How many prayer points are consumed per minute by an active prayer, reduced by your equipped Prayer bonus.

Frequently Asked Questions

What's the exact OSRS combat level formula?

Combat level = Base + the highest of three combat-style contributions. Base = 0.25 × (Defence + Hitpoints + ⌊Prayer ÷ 2⌋). Melee = 0.325 × (Attack + Strength). Ranged = 0.325 × ⌊Ranged × 1.5⌋. Magic = 0.325 × ⌊Magic × 1.5⌋. Only the single highest combat-style contribution counts — training all three styles equally doesn't stack their bonuses.

Why is a maxed account combat level 126, not higher?

At 99 in every relevant stat: Base = 0.25×(99+99+49) = 61.75, and Melee = 0.325×(99+99) = 64.35 is the highest style contribution (Ranged/Magic tie lower at 0.325×148 = 48.1). 61.75 + 64.35 = 126.1, which floors to 126 — the maximum possible combat level in OSRS.

What inputs does the DPS calculator need?

Accuracy (as a percentage — your chance to land a hit at all), Max Hit (your highest possible damage roll with current gear), and Attack Speed in game ticks (each tick is 0.6 seconds — most weapons range from 4 ticks/2.4s for fast weapons to 6+ ticks for slow ones). These come from your gear setup; use the OSRS Wiki's equipment stats or a gear-specific max hit calculator to find them, then plug the numbers in here.

How accurate is the prayer drain time estimate?

It's a close community-published estimate, not an official Jagex constant. Prayer bonus from gear reduces drain rate roughly according to effective drain = base drain ÷ (1 + Prayer Bonus ÷ 30) — accurate enough for planning potion timing, but the true in-game mechanic works on a tick-by-tick basis that can differ by small fractions of a point per minute from this approximation.

Why does combat level use max(), not a sum, across styles?

Because a player's combat level is meant to represent their overall threat level in PvP, and being equally strong in melee, ranged, AND magic doesn't make someone three times more dangerous than being strong in just one — you can only fight with one style at a time. The formula rewards specialization in whichever style is actually your strongest.