Grow a Garden Calculator

Grow a Garden on Roblox blends idle farming, pet collection, mutation hunting, and player trading into one of the platform's fastest-growing sims. Keeping up with patch notes, pet tiers, weather windows, and trade math is a part-time job — so we built this calculator hub to answer the questions players actually search: how much will my pet weigh at age 100, what is my Rainbow Shocked carrot worth, and is this Discord trade a win or a scam?

Every tool on this site uses community-verified formulas tied to live game mechanics. Pet weight follows W = (hatchWeight ÷ 11) × (age + 10). Crop value applies weight squared with growth and environmental mutation brackets. Egg hatch boosts stack additively to ninety percent. WFL trades use standard ±10% fair thresholds. When the June 2026 Shroomie update dropped Overgrown mutations and new pets like Shroomie, we refreshed data within days — the same cycle we follow for every numbered patch.

Whether you are hatch-counting commons, pushing a Kitsune to age 100, or listing a Celestial Bloom harvest in a trade server, start here. Calculators give numbers; our strategy guides explain when those numbers matter. No login, no paywall, mobile-friendly layouts, and FAQ content rendered in server HTML for accessibility.

We are fan-made and not affiliated with Roblox or Grow a Garden developers — always double-check high-value trades in-game. For corrections after patches, visit the contact page or browse the changelog.

Calculators are only useful if you know which dataset they are drawing from. Treat the newest entry on the changelog as the version ceiling for pets, crops, mutations, and weather that appear across this site. If your client shows a newer build than that ceiling, expect temporary gaps: new names may appear in-game before they appear in our tables, and sell prompts can diverge until we reconcile community-reported math with the published formulas.

Pick a path by decision, not by tool name

Ask what you need to decide before opening a calculator. Pet aging and hatch-weight classification belong on the pet weight tools. Harvest pricing and mutation stacking belong on crop value and mutation pages. Fairness between two trade baskets belongs on the WFL checker after each side has already been priced. Codes, weather windows, and tier context live outside pure math pages because they expire on different schedules than weight or sell formulas.

What "aligned with the game" means here

Core formulas are documented in site constants and mirrored in the calculator UIs: pet weight scales from hatch weight and age, crop sell price squares weight before mutation brackets, hatch helper boosts stack additively up to a ninety-percent cap, and WFL fairness uses a ±10% band on the received-to-offered ratio. Those rules change less often than content lists. When a numbered update ships, we prioritize new pets, crops, mutations, and weather rows first, then re-check any formula that community reports show has moved.

Scope boundaries worth knowing

Classic Grow a Garden tools and the separate Grow a Garden 2 crop calculator do not share one price table. Event-only items can leave the active economy while remaining in our databases for reference. Dupe serial ranges are community-sourced risk signals, not proof of ownership or Roblox enforcement. Guides explain decision-making; calculators do not auto-apply guide recommendations into your inputs.

If an in-game sell prompt, pet age weight, or hatch timer disagrees with a page after you verified the version, send the mismatch through contact with the tool URL and a clear before/after reading. That is how version boundaries close without waiting for a full site rewrite.