Pick a pet (or type its base $/s), choose a mutation and weight, and the calculator shows your income and how long it takes to reach a cash goal. It uses the formula documented on the community wiki: base income x mutation x size.
Shorthand works in text fields: K = thousand, M = million, B = billion, T = trillion, Qa = quadrillion, Qi = quintillion. If you already see a pet's real $/s on its in-game card, type that as base income and leave mutation on Normal and weight ratio at 1, since the card value already includes them.
How the formula works
The community wiki (mirrored on rblxguide.com) gives income as:
income per second = base income x mutation multiplier x size multiplier
- Base income is the $/s listed for the species in the pet index. A Chicken is $1/s, a Brr Brr Patapim is $1.8K/s, a Cerberus is $8M/s. The full table is on the pets list.
- Mutation multiplier is 1 for a normal pet. Values for each mutation are on the mutations page.
- Size multiplier comes from how heavy the pet hatched compared with its hidden base weight. The wiki-derived formula is
ratio^(37/60)up to 125x weight, thenratio^(2/5) x 125^(13/60)above that, so gains slow down past 125x.
Size multiplier at common weight ratios (from that formula):
| Weight vs. base | Size multiplier |
|---|---|
| 1x | 1.00 |
| 2x | 1.53 |
| 5x | 2.70 |
| 10x | 4.14 |
| 25x | 7.28 |
| 50x | 11.2 |
| 100x | 17.1 |
| 125x (soft cap) | 19.6 |
| 500x | 34.2 |
| 1000x | 45.1 |
The table shows something that matters for planning. A pet hatched at only 10x its base weight earns more (x4.14) than a normal-weight Rainbow (x3.5). That is why experienced players pick the biggest egg in a nest over a rare-looking color. Base weights are hidden in game, so you usually only know the ratio from the wiki or by comparing your pet’s card to its listed base income.
Time to target is (target - cash now) / total income per second. It assumes every pet stays on your base and nothing else changes.
Assumptions and limits
- Equipped pets only. A pet earns only while placed in a pen slot. Pets in your inventory earn nothing.
- Offline income is assumed to equal online income. The game does pay offline (players report login messages like “You earn $16M/Day offline!”), but we found no source saying whether the offline rate is the full rate. Treat the per-day number as a ceiling.
- No boosts. Admin Abuse server boosts and temporary potions are not included. Their exact values are not published.
- Two mutations. Sources disagree on stacking. One guide (holdtoreset.com, updated October 24, 2026) says bonuses add together, so Golden + Rainbow is x5, not x8.75. The wiki mirror only gives single-mutation examples. Additive is the default here because it is the only stated rule; switch the dropdown if you test it differently.
- The size formula is labelled beta by the site that publishes it. Expect small differences from the in-game card.
Where sources disagree
Multipliers changed between the August 2026 guides and the September/October ones. The calculator uses the newer values because three independent current sources agree on them. The older values are shown in the dropdown labels so you can switch if your in-game card says otherwise.
| Mutation | Used here | Older value | Who says what |
|---|---|---|---|
| Silver | 1.2x | 1.25x | 1.2x: wiki mirror, allthings.how (Sep 16), holdtoreset (Oct 24). 1.25x: techwiser (Aug 27), beebom |
| Bloom | 1.25x | 1.5x | Same split as above |
| Golden | 2.5x | 2x | Same split as above |
| Spirit Bloom | 2.5x | 3x | Same split as above |
| Rainbow | 3.5x | 2.5x | Same split; the wiki mirror header also shows 3.53x once |
| Luminous | 10x | not listed | allthings.how and holdtoreset list 10x. The wiki lists Luminous Reroll pets as separate species with their own incomes (Spike $15K/s vs. Luminous Spike $350M/s), which does not fit a flat 10x. Treat as unconfirmed |
| Enchanted, Nitro | 2.75x | not listed | Only holdtoreset gives a value |
| Spectral | 2.75x | not listed | Community reports only; holdtoreset lists it as “TBC” |
If you want a quick sanity check: put a pet you own in the calculator with Normal, weight 1, and compare to its index base income. Then set the mutation and compare to the card. If they differ, the card is right.
Sources & last checked
Last checked: October 27, 2026.
- Steal an Egg Wiki (Fandom) - primary community data, CC BY-SA 3.0 (read through the rblxguide mirror; the wiki itself blocked our fetch)
- rblxguide.com income calculator and formula and mutations (synced October 24, 2026)
- allthings.how: mutations, every multiplier (updated September 16, 2026)
- holdtoreset.com mutations guide (updated October 24, 2026)
- techwiser: all mutations (August 27, 2026, older values)
- beebom mutations guide (older values)
- allthings.how: how to get more money fast (offline income message)
Related: how to make money fast, events schedule.