How the calculation works
Subtract the reserve from the balance, with zero as the minimum. Divide that spendable amount by the unit price and round down to a whole number of purchases.
Enter the current price of a pet pack or merchandise box, then protect the money you want to keep for the rest of the shop. The result tells you how many purchases at that same price fit your balance.
Use one currency and one unit price throughout. Read the cost from the selected purchase panel in your own game.
These inputs stay in your browser. The tool calculates spending; it does not predict which pets a pack reveals.
Subtract the reserve from the balance, with zero as the minimum. Divide that spendable amount by the unit price and round down to a whole number of purchases.
Use the price displayed for the pack or merchandise box you plan to buy. A regular Fish Pack and a Robux pack use different currencies, so calculate them separately.
The result assumes every purchase in the batch costs the entered amount. For differently priced items or successive expansions, calculate separate batches. Pack outcomes are not part of this calculation.
It calculates the number of equal-price purchases that fit your balance after keeping a reserve, the remaining money and any shortfall for a target batch.
Yes, in separate calculations. Use the same currency for the balance, price and reserve each time; the tool does not convert cash into Robux.
No. It uses the price you enter to calculate a spending limit. It does not include pack probabilities or a guaranteed rare-pet result.
The calculator performs these calculations in your browser. It has no Roblox account connection and does not submit its input values.