Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

Loot Drop Probability Calculator

Calculates the cumulative probability of getting at least one of a desired item across multiple independent attempts at a given per-attempt drop rate. Applies to gaming loot drops, dice-roll board game outcomes, and any binomial 'at least one success' problem.

Drop Rate (%)

Number of Attempts (attempts)

Fill in the required fields to see your result.

Gaming

Level Up Calculator

Calculates the total XP (experience points) needed to advance from one character level to another using a flat XP-per-level model. Useful for RPGs, legacy board games (Gloomhaven, Pandemic Legacy), and any progression system with linear XP costs.

Current Level (lvl)

Target Level (lvl)

XP per Level (XP)

Fill in the required fields to see your result.

Key differences

	Loot Drop Probability Calculator	Level Up Calculator
Category	Gaming	Gaming
Inputs required	2	3
Result	Probability (%)	XP Needed (XP)
What it does	Calculates the cumulative probability of getting at least one of a desired item across multiple independent attempts at a given per-attempt drop rate. Applies to gaming loot drops, dice-roll board game outcomes, and any binomial 'at least one success' problem.	Calculates the total XP (experience points) needed to advance from one character level to another using a flat XP-per-level model. Useful for RPGs, legacy board games (Gloomhaven, Pandemic Legacy), and any progression system with linear XP costs.