Egg value

First decide which kind of value you mean

There are three different questions: what a resulting pet earns, whether it improves your current pen, and what another player would exchange for the egg. This guide addresses the first two. It does not assign a trading price to an unopened egg.

For an income upgrade, start with the weakest pet you would replace. An outcome earning less than that pet adds no income if it takes the same slot. An outcome earning more adds the difference, not its entire income. If you have a spare earning slot, the comparison is different: the baseline for that slot is zero.

Listed base-income range by biome

These figures describe the pets currently in the site's records at the listed base condition: default size and no mutation. They do not describe how often each outcome occurs. A missing income stays unknown; it is not counted as zero.

What an expected-value calculation actually needs

For each possible outcome, multiply its probability by its income, then add the results. The probabilities must cover all outcomes and add to 100%. They also need to match the egg type and any luck or event conditions you are using.

For example, imagine an egg with only two outcomes: 90% at $10/s and 10% at $100/s. Its expected base income would be $19/s, while the equal-weight species average would be $55/s. These are invented numbers to explain the calculation, not Steal An Egg drop rates.

If your replacement pet already earns $20/s, the $10 outcome offers no income upgrade. In this example, the expected improvement is 90% × $0 + 10% × $80 = $8/s per attempt, assuming you only replace a pet when the new one earns more. That is a different measure from the egg's expected base income.

Choose your next egg with a replacement target

1. Record your current benchmark. Use the displayed income of the pet you would replace, with its size, mutation and boosts noted.
2. Check the accessible roster. Use the egg predictor to see listed possibilities. It identifies candidates; it does not reveal the contents of a particular egg.
3. Compare on the same basis. Do not compare a boosted pet you own directly with an unmodified catalog figure and attribute the entire difference to species.
4. Include the attempt cost. A failed return, a long trip or an occupied hatch slot can make a route less useful even when its best listed outcome is stronger. See how to compare biome routes.

The eggs reference carries the separate Brainrot Egg probability records. Those rates do not apply to biome eggs. A complete odds table still cannot produce an income estimate if the corresponding base-income figures are missing.

Egg value FAQ

How much is an egg worth in Steal An Egg?

An unopened egg has no single known income value. The pet it produces, its size and any mutation affect the result. The table shows listed base-income ranges by biome; these are not sale prices or expected earnings per hatch.

Can I calculate the average income from an egg?

Only with the relevant outcome probabilities and comparable income figures. The biome records used here do not contain a complete set of per-pet hatch probabilities. Averaging species equally would assume equally likely outcomes, which has not been established.

Does a later biome always give a better egg?

Its listed pets may have higher base incomes, but that does not establish a higher expected return per attempt. Hatch probabilities, travel time, successful returns and your existing pets all affect the decision.

Is a listed pet income also an egg trading value?

No. Income per second measures production under specified conditions. It does not establish a trading price, a sale price or the chance of obtaining that pet.