Calculator Inputs
Enter as fraction (1/128), "1 in 128", or decimal (0.0078125)
Number of drop rolls per kill (e.g., 3 for some bosses)
Probability Results
Enter your drop chance and kill count, then click "Calculate Probabilities" to see results.
Not affiliated with Jagex Ltd. Drop rate data may come from community sources. Use at your own discretion. Made with ❤️ for the OSRS community.