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Grow a Garden Pet Age → Weight & Class Calculator

Track how your Grow a Garden pets bulk up as they age, convert hatch weights into final classes, and benchmark Huge or Titanic rolls using wiki-confirmed rules.

Weight growth overview

Every age tick adds steady weight gain, so planning around age milestones keeps your builds on pace for desired class breakpoints. Sample from egg or shop ranges, apply Huge or Brontosaurus bonuses, and see how fast you reach Titan-eligible weight.

Age → Weight & Class

Most abilities scale with weight. Age 100 is roughly ten times the hatch weight. Friend Boost only affects Sheckle sell value.

Hatch (no Bronto): 1.50 kg

Weight at age 20: 4.09 kg

Weight at age 100: 15.00 kg

Class1

Starfish tags

Self XPXP specialist

Weight projection

Reach target weight → age solver

Estimated age
27
Where W₁ is the current weight at age A₁, and W₂ is your target weight.
The ⌈ ⌉ operator denotes ceiling (round up to the nearest integer).
Result is clamped to 1–100. Uses current W₁ and A₁ from the left panel.

Infer hatch weight from current

Hatch weight (with bonuses)
1.50 kg
Hatch weight (no Bronto)
1.50 kg
Titanic check (Huge applied, no Bronto)
Not eligible — check weight 1.50 kg
Titanic ignores Bronto; Huge applies before check.

Titanic eligibility checks the hatch weight without the Bronto bonus. Huge rolls (≈0.1%) multiply weight by four and can push normal eggs over the 3 kg threshold.

Frequently Asked Questions

These answers summarise key weight and class mechanics documented on the Grow a Garden wiki.

How does pet age, weight influence weight in Grow a Garden?
According to the Grow a Garden wiki, a pet's age pushes its weight upward on a straight line: each age adds roughly one eleventh of the hatch weight, so an age 100 pet is around ten times heavier than it was at age 1. Heavier pets hit harder because most abilities scale directly with weight.
What starting weight ranges should I expect from eggs or shop pets?
Standard eggs roll between roughly 0.88 kg and 2.20 kg, while pets bought from shops or chests stay in a tighter 0.88 kg to 1.32 kg band. These ranges match the wiki's documented hatch tables and help you estimate your age 100 class ceiling.
How are pet age, weight, classes calculated?
Class is determined by a pet's projected weight at age 100. Divide that value by 10 and take the floor to map the pet into class 0 through class 11. This mirrors the class breakdown chart on the wiki and keeps heavy hatch rolls on track for higher-class builds.
Do Huge, Brontosaurus, or Titanic traits change age ,class math?
Huge pets multiply their hatch weight by four, so their age 100 projections and class jump accordingly. Brontosaurus adds 30% weight to other pets but its bonus is ignored for Titanic checks, and Titanic status only triggers when the unmodified hatch weight reaches at least 3.0 kg, just like the wiki describes.
Does Friend Boost improve age ,weight, ability power?
No. The Friend Boost noted on the wiki only increases the Sheckles you earn when selling a pet—it has no impact on combat or XP abilities, so the weight-to-class math in this calculator stays accurate.