Drop Cost Calculator
Compare your budget with the expected cost and chance of getting a drop.
Put a cost next to the drop chance
Knowing the odds is only half the decision when each attempt costs currency. Enter the chance, the cost of one attempt and the amount you are willing to spend. The result separates your average expected cost from the chance your actual budget can buy.
A budget example
At 2% odds and 100 currency per attempt, the average cost to the first drop is 5,000. A budget of 5,000 buys fifty attempts and gives about a 63.6% chance of at least one drop. An expected cost of 5,000 is not a spending cap.
Compare before you spend
The budget calculation rounds down to complete attempts. If you have 550 currency and attempts cost 100, only five fit within the budget. The remaining fifty cannot buy another full attempt.
Keep all money inputs in the same currency. Prices, discounts and actual game rules are supplied by you. A free attempt has no cost based budget limit, but its probability still matters.
Questions about Drop Cost Calculator
Why are average cost and budget chance separate?
Average cost summarizes many independent runs. Budget chance answers what a fixed number of affordable attempts can achieve.
Does the tool use current game prices?
No. It uses the cost you enter and does not fetch store prices.
What if the price changes between attempts?
This model assumes one fixed cost. Calculate each pricing period separately rather than treating changing prices as one run.