This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own Fake an Egg session. It will not click the shop.
Upgrade payback
Income payback
Estimate how long a constant extra cash rate would take to match a cost you enter. Use your own displayed rate and price. The starter numbers illustrate a $3 per second video snapshot and a hypothetical cost of 300; they are not current Bunny stats or a shop price.
Payback cycles = upgrade cost ÷ extra profit per cycle, rounded up.
Defaults are a teaching example, not shop prices. 180 cash in one minute is what a constant $3 per second would add, matching one Bunny frame in the Mr Red Dangerous video. 300 is a hypothetical cost from that same teaching example. Replace both with the cost and rate your session shows. If the rate already includes a boost, do not multiply it again. The estimate assumes the extra rate stays constant for the whole payback and ignores downtime, theft, and expired boosts.
Drop probability
Shown chance, repeated attempts
Turn a percent you can actually read in Fake an Egg into the chance of at least one success over several independent attempts. Leave this unused when the game does not show a percent. No official hatch odds are on file.
Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.
10 percent and 5 attempts are blank examples so the form is not empty. No hatch, mutation, or steal percentage has been verified for Fake an Egg. Enter a percent only when the game displays it. The result is the chance of at least one success if each attempt is independent and the percent does not change. It does not model pity, luck boosts, or a changing pool.