Cosmic Dragon Income Calculator
For the Roblox game Steal An Egg. Type your Cosmic Dragon's weight and mutations to see what it earns and how long it takes to afford your next upgrade.
Updated · game data from the wiki as of 30 September 2026 · changelog
Short answer: a Cosmic Dragon earns $60M per second at its base weight of 15,000 kg with no mutations. That is $216B per hour. Every doubling of its weight multiplies income by about 1.53, so a Golden Cosmic Dragon at twice the base weight (30,000 kg) earns $230M/s. Type your own Cosmic Dragon's weight and mutations below.
Cosmic Dragon at a glance
| Rarity | Secret |
|---|---|
| Biome or egg | Cosmic |
| Base income | $60M/s · $216B/hour · $5.18T/day |
| Base weight | 15,000 kg (wiki calculator data; no second source) |
| Rank by base income | #23 of 37 Secret pets in our data |
| Egg grow time | 3h (wiki pet page; unverified) |
| How sure | Base income: the wiki's calculator data and the Cosmic Dragon wiki page agree. Steal An Egg Time lists $60M/s (matches; marked "community" there). |
Cosmic Dragon income by weight
No mutations, no boosts. The size multiplier is (weight ÷ 15,000 kg)37/60 up to 125× base weight, then grows more slowly.
| × base | Weight | Size | Per second | Per hour |
|---|---|---|---|---|
| 1× | 15,000 kg | ×1.00 | $60M | $216B |
| 2× | 30,000 kg | ×1.53 | $92M | $331.2B |
| 5× | 75,000 kg | ×2.70 | $161.88M | $582.75B |
| 10× | 150,000 kg | ×4.14 | $248.21M | $893.55B |
| 50× | 750,000 kg | ×11.16 | $669.65M | $2.41T |
| 125× | 1,875,000 kg | ×19.64 | $1.18B | $4.24T |
| 250× | 3,750,000 kg | ×25.91 | $1.55B | $5.6T |
Cosmic Dragon income by mutation
At base weight (15,000 kg). With two mutations the wiki disagrees with itself on whether they add or multiply, so both are shown.
| Mutation | If they add | If they multiply |
|---|---|---|
| None | $60M/s | same |
| Silver | $72M/s | same |
| Golden | $150M/s | same |
| Rainbow | $210M/s | same |
| Golden + Bloom | $165M/s | $187.5M/s |
| Rainbow + Parasite | $330M/s | $630M/s |
Worked example: a Golden Cosmic Dragon at twice base weight
- Weight ratio: 30,000 kg ÷ 15,000 kg = 2.
- Size multiplier: 237/60 = ×1.5333.
- Golden multiplies by 2.5, so income = $60M × 1.5333 × 2.5 = $230M/s, which is $828B per hour.
- Saving for the Lucky Block Treadmill ($75B) from $0 with only this pet: 5m 26s. A plain Cosmic Dragon at base weight would take 20m 50s.
Common mistakes
- Expecting income to double with weight. A Cosmic Dragon at 30,000 kg earns $92M/s, not double the base. To double its income it has to weigh about 3.08 times the base: 46,159 kg.
- Forgetting the 125× soft cap. For a Cosmic Dragon that is 1,875,000 kg. Past it, extra weight still helps but much less: doubling from 125× to 250× adds only about 32%.
- Assuming mutations multiply. A Golden + Bloom Cosmic Dragon at base weight earns $165M/s if mutations add (the wiki calculator's rule) and $187.5M/s if they multiply. Plan with the lower number until it's confirmed.
- Counting the x2 gamepass twice. Tick it once. If you copy this pet's income into the treadmill calculator with x2 already included, leave x2 unticked there.
Questions
How much money does a Cosmic Dragon make in Steal An Egg?
At its base weight of 15,000 kg with no mutations, a Cosmic Dragon makes $60M per second, or $216B per hour. Heavier and mutated Cosmic Dragons make more: a Golden one at twice the base weight makes $230M per second.
How much is a Cosmic Dragon worth in Steal An Egg?
Steal An Egg has no trade window, so there's no reliable trade value. What a Cosmic Dragon is worth to you is the money it earns: $216B per hour at base weight, and more for a heavier or mutated one. Enter yours in the calculator above.
How heavy does a Cosmic Dragon need to be to double its income?
About 3.08 times its base weight, because income grows with weight to the power 37/60. For a Cosmic Dragon that is 46,159 kg.
What is the best mutation for a Cosmic Dragon?
Rainbow is the strongest hatch colour at ×3.5: a Rainbow Cosmic Dragon at base weight earns $210M per second. With Parasite on top it reaches $330M per second if mutations add.
Other Secret pet calculators
- Ember Dragon Secret
- Stag Secret
- Scorched Dragon Secret
- Kraken Secret
- Cerberus Secret
- Yeti Secret
- King Snake Secret
- Abyss Overlord Secret
Have more than one pet? The Steal An Egg pen calculator adds up your whole pen. Or use the weight calculator, mutation calculator, fuse calculator or treadmill calculator.