Steal an Egg Income Calculator: Passive and Offline Planning

How do you calculate Steal an Egg pet income?

Start with the live income contribution shown by one pet, then multiply it by the visible multipliers that apply in your base:

contribution = base income × mutation multiplier × size multiplier × copies

If the game displays a combined rate for your base instead of a per-pet rate, use that value as the starting number and set the remaining multipliers to 1.

Offline & Passive Income Calculator

Enter a live contribution rate from one pet, then project passive income for your own session length.

Base income / second Mutation multiplier Size multiplier Copies Hours to project

Formula: base × mutation × size × copies. This is a planning estimate, not a guarantee of live game behavior.

Which values should you use?

Input	Best source
Base income	The current pet card or income display in your own base.
Mutation multiplier	A confirmed in-game label, not a chat screenshot.
Size multiplier	The current size state after hatching or feeding.
Copies	The number of the same pet currently contributing.
Hours	Your real planned play or away time.

How to test a real income change

The formula is simple, but the decision should be measured. Use this workflow:

1. Record the current pet contribution before changing anything.
2. Record the candidate pet’s live base rate.
3. Add mutation, size, and copies for both.
4. Run the calculator with the same planned hours.
5. Repeat the in-game observation three times if possible.
6. Compare the projected gain against the time needed to obtain the pet.

This prevents a common mistake: replacing a well-mutated pet with a higher-base pet that has no comparable mutation or size.

Example decision rule

If the candidate is only slightly better on paper, check whether one of these is true:

• You can add another copy instead of replacing a good pet.
• The mutation advantage is larger than the base-rate gap.
• The route to the candidate is much slower or riskier.
• Your current setup is still earning while you chase the new pet.

If none of those are clearly true, the upgrade may not be worth the time.

What the calculator cannot decide

It cannot know whether a pet will remain good after the next update, whether an offline cap exists, or whether your route time makes the target practical. Use it with the run planner and the research method if you need a fuller workflow.

When is this more useful than a fixed table?

This calculator survives balance changes better than a static table because it separates the live value from the planning math. Re-enter your current numbers after every update, then compare two setups with the full calculator suite or check related pets in the all pets index.

Should you enter a displayed total or a base rate?

Use the least processed value you can identify. If the game shows a pet’s base income and separately shows mutation and size multipliers, enter all three. If the displayed contribution already includes those effects, enter that contribution as the base and leave both multiplier fields at 1. Multiplying an already modified value again is the most common way to create an impressive but false projection.

Run a simple consistency check: set copies to one and hours to a short interval, then compare the calculated per-second contribution with the live display. If the result is larger by exactly one of your multipliers, that modifier was probably already included. The calculator cannot detect this automatically because it receives numbers, not the meaning of the game’s UI label.

How do you compare an upgrade fairly?

Create one calculation for the current slot and one for the proposed replacement. Use the same time period and the values visible under the same conditions. Then calculate the difference between the two totals. That difference is the benefit attributable to the swap; the candidate’s entire income is not new benefit because the old slot was already producing value.

Next compare that gain with acquisition effort. Time a complete attempt from leaving the base until you are ready to start again. Include failed returns as zero-result attempts. You do not need a universal drop-rate claim to answer whether the candidate is worthwhile for you: the observed time cost and the calculated improvement are enough to frame the choice.

How should copies be handled?

The copies field assumes each copy contributes the same entered rate. Use it only when the copies have matching relevant values. If one pet has a different mutation or size, calculate that pet separately and add the results. Combining unlike pets under one multiplier hides the strongest and weakest contributions and makes later checks difficult.

For a mixed base, make a short table with one row per distinct configuration:

Configuration	Rate entered	Copies	Projected contribution
Normal version	live value	matching count	calculator result
Mutated version	live value or separate inputs	matching count	calculator result
Different size	live value or separate inputs	matching count	calculator result

The labels matter more than fancy formatting. A future update can be handled by replacing one row instead of reconstructing an undocumented total.

How can you avoid overstating offline income?

Do not label the hours field “offline hours” unless you have confirmed that the current game awards the same contribution while away and have checked any visible cap or adjustment. The field simply multiplies a contribution over time. For an offline estimate, observe the balance immediately before leaving and immediately after returning, record the elapsed time, and compare the actual change with the projection.

A mismatch can reflect an offline cap, different calculation rule, server timing, or an input that already included a multiplier. One observation identifies a question; repeated observations under recorded conditions support a working estimate. Keep such an estimate personal until it is documented well enough for publication.

What should you record with a saved result?

Save the page or pet name, visible input labels, date, game version if shown, calculation purpose, and whether the starting rate was base or already modified. Screenshots can help you remember labels, but write the units in text as well. If you later share the result, call it a calculation from supplied inputs rather than an official earning guarantee.

For base-wide decisions, repeat the calculation for each materially different slot and add the contributions. Then use the best pets guide as a target list while keeping your actual live cards as the source for the numbers.

How do you check the estimate against the live game?

Write down the displayed balance before a quiet measurement window, avoid changing pets or modifiers, and record the balance and elapsed time afterward. Note any collection action, cap, reconnect, or event that could affect the difference. Compare the observed change with the calculator result using the same time unit. One mismatch is a reason to inspect the inputs, not proof of a hidden universal multiplier.

Repeat under similar conditions before revising a working estimate. If the result stays different, test whether the entered rate was already modified, whether copies contribute independently, and whether offline progress follows a different rule. Keep each hypothesis labeled until the interface or repeated measurements support it. This process turns the calculator into an auditable decision aid while avoiding claims about server logic the page cannot observe.