Upgrade payback calculator
Estimate the payback time of a known upgrade cost using a measured increase in retained money per second. No future hatch or hidden upgrade coefficient is assumed.
Your observed inputs
Inputs and formula
Cost ÷ (after rate − before rate). Requires a positive measured gain.
- Upgrade cost
- Income before / second
- Income after / second
Measurement checklist
Use values from the same session and keep the original units. Empty fields are unknown, not zero. A result becomes stale when an input changes; edit and calculate again. The tool rejects non-finite results instead of printing infinity.
Scope and privacy
This utility is transparent arithmetic, not a verified hidden game formula. It cannot read inventory, claim rewards or predict random results. No login is requested, and these inputs are not persisted.
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Sources & review notes
Checked 2026-09-26. Content revised 2026-09-26. Source dates and confidence apply to the claims they support, not to every possible value in the game.
- Steal An Egg — Roblox experienceOfficial source · checked 2026-09-25
Correct creator and place; core steal, hatch, income, treadmill, base, size and mutation loop. Not a balance table.