OSRS Combat Calc

OSRS Slayer Calculator

Plan your next Slayer level from the monsters you actually kill. Most monsters give Slayer XP equal to their Hitpoints, so enter that per kill along with your usual task size and kill rate.

Calculate your result

Adjust the fields to calculate your result.

Model limits: Some monsters give Slayer XP that differs from their Hitpoints, and superior or boss kills vary. Travel, banking and task skips are only included if they are part of your measured kill rate. The combat XP estimate assumes you deal damage equal to the Slayer XP.

How OSRS Slayer Calculator Works

To use the OSRS Slayer Calculator, enter your Slayer level or XP, a target level, Slayer XP per kill, task size and kill rate, then read the kills, tasks and hours.

  1. Enter your current Slayer level and, if you know it, your exact Slayer XP.
  2. Enter your target Slayer level.
  3. Enter the Slayer XP per kill, which equals the monster’s Hitpoints for most monsters.
  4. Enter your usual kills per task and kills per hour.
  5. Read the kills, tasks, hours and combat XP gained.

OSRS Slayer Calculator Formula

The OSRS Slayer Calculator formula is Kills = ⌈Slayer XP remaining ÷ Slayer XP per kill⌉.

Kills = ⌈Slayer XP remaining ÷ Slayer XP per kill⌉
Tasks = ⌈kills ÷ kills per task⌉
Hours = kills ÷ kills per hour
Combat XP ≈ Slayer XP × 4 + Slayer XP × 1.33 Hitpoints

  • Most monsters give Slayer XP equal to their Hitpoints.
  • Combat XP assumes damage equals Slayer XP.
  • Kills per hour should include banking and travel.

OSRS Slayer Calculator FAQ

How is Slayer XP calculated in OSRS?

Slayer XP is equal to the monster’s Hitpoints for most monsters. A 100-Hitpoints monster gives 100 Slayer XP per kill on task.

Do you get Slayer XP off task?

No, you get Slayer XP only from monsters on your current task.

How much combat XP does Slayer give?

Slayer gives about 4 combat XP and 1.33 Hitpoints XP for every 1 Slayer XP.

How many tasks is 99 Slayer?

99 Slayer is about 650 tasks at 20,000 Slayer XP per task, or 13,034,431 XP in total.

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