How the Max Hit Calculator works

Three formulas, one per style, with the rounding steps the game uses.

checked against the live game · 2026-11-11 ← Back to the calculator

Melee

effective = floor(StrengthLevel × prayer) + styleBonus + 8
effective = floor(effective × 1.10) if void melee
maxHit = floor(0.5 + effective × (StrengthBonus + 64) / 640)
maxHit = floor(maxHit × m) for each later multiplier m (slayer helmet 7/6, salve 7/6 or 1.2, specials)

Prayer multipliers: Burst of Strength 1.05, Superhuman 1.10, Ultimate 1.15, Chivalry 1.18, Piety 1.23. Style bonus: Aggressive 3, Controlled 1, otherwise 0.

Example: 99 Strength, Piety, Aggressive, +130 strength bonus, slayer helmet on task: effective = floor(121.77) + 3 + 8 = 132; base = floor(0.5 + 132 × 194 / 640) = floor(40.51) = 40; on task floor(40 × 7/6) = 46.

Ranged

effective = floor(RangedLevel × prayer) + styleBonus + 8
effective = floor(effective × 1.10) void | floor(effective × 1.125) elite void
maxHit = floor(0.5 + effective × (RangedStrength + 64) / 640)
maxHit = floor(maxHit × m) for each later multiplier (slayer helmet (i) 1.15, salve (i) 7/6, salve (ei) 1.2, dragon hunter crossbow 1.25 …)

Prayer multipliers: Sharp Eye 1.05, Hawk Eye 1.10, Eagle Eye 1.15, Rigour 1.23. Style bonus: Accurate 3, Rapid and Longrange 0.

Magic

maxHit = floor(base × (1 + magicDamage% / 100))

base is the spell's fixed hit or, for powered staves, a function of your visible Magic level: trident of the seas floor(L/3) − 5, trident of the swamp floor(L/3) − 2, Sanguinesti staff floor(L/3) − 1, Tumeken's shadow floor(L/3) + 1, Thammaron's sceptre floor(L/3) − 8, accursed sceptre floor(L/3) − 6, Magic Dart 10 + floor(L/10). magicDamage% is the equipment total plus additive bonuses: slayer helmet (i) +15% on task, salve amulet (ei) +20%, elite void +2.5%. Tumeken's shadow multiplies the equipment magic damage by 3 (4 inside the Tombs of Amascut). Charge raises the three god spells to 30; chaos gauntlets add 3 to bolt spells.

Spell base hits used

Book	Spell	Level	Base
Standard	Wind Strike	1	2
Standard	Water Strike	5	4
Standard	Earth Strike	9	6
Standard	Fire Strike	13	8
Standard	Wind Bolt	17	9
Standard	Water Bolt	23	10
Standard	Earth Bolt	29	11
Standard	Fire Bolt	35	12
Standard	Wind Blast	41	13
Standard	Water Blast	47	14
Standard	Earth Blast	53	15
Standard	Fire Blast	59	16
Standard	Wind Wave	62	17
Standard	Water Wave	65	18
Standard	Earth Wave	70	19
Standard	Fire Wave	75	20
Standard	Wind Surge	81	21
Standard	Water Surge	85	22
Standard	Earth Surge	90	23
Standard	Fire Surge	95	24
Standard	Crumble Undead	39	15
Standard	Iban Blast	50	25
Standard	Saradomin Strike	60	20
Standard	Claws of Guthix	60	20
Standard	Flames of Zamorak	60	20
Ancient	Smoke Rush	50	13
Ancient	Shadow Rush	52	14
Ancient	Blood Rush	56	15
Ancient	Ice Rush	58	16
Ancient	Smoke Burst	62	17
Ancient	Shadow Burst	64	18
Ancient	Blood Burst	68	21
Ancient	Ice Burst	70	22
Ancient	Smoke Blitz	74	23
Ancient	Shadow Blitz	76	24
Ancient	Blood Blitz	80	25
Ancient	Ice Blitz	82	26
Ancient	Smoke Barrage	86	27
Ancient	Shadow Barrage	88	28
Ancient	Blood Barrage	92	29
Ancient	Ice Barrage	94	30
Arceuus	Ghostly Grasp	35	12
Arceuus	Skeletal Grasp	56	17
Arceuus	Undead Grasp	79	24
Arceuus	Inferior Demonbane	44	16
Arceuus	Superior Demonbane	62	23
Arceuus	Dark Demonbane	82	30

Not included

Accuracy and hit chance: a max hit is what lands when it lands.
Weapon specials that roll twice, Keris, Dharok's, colossal blade and other case-by-case effects: use the "other multiplier" field where it is a plain multiplier.
Tome of fire/water and magic damage caps: enter their effect in the magic damage field if your setup uses them.

Sources

The melee and ranged formulas are the long-standing public ones; multipliers and base hits checked against the live game on 11 November 2026.
Magic bonuses from the slayer helmet, salve amulet and void are additive to the equipment percentage since the 2024 combat rebalance; constants are tagged for re-check in the source.

Old School RuneScape is a trademark of Jagex. This site is an independent fan-made tool and is not affiliated with, endorsed by or sponsored by Jagex. Game names are used only to describe what the calculators are for. No game art, icons or logos are used. Formulas are compiled from public sources and may lag behind patches — each tool shows the game version it was checked against.