🐛 Realistic growth modeling — not just naive doubling forever
Tell us your starting worm weight and how long it’s been going — the jar below fills with worms live, and we’ll tell you when you’re ready to split into a second bin.
A rough projection of your total worm weight today, based on a realistic growth curve rather than assuming unlimited doubling forever.
Roughly 1,000 red wigglers per pound — a handy way to visualize the actual number of worms behind the weight figure.
How many times larger your colony is compared to when you started — capped at a realistic ceiling once a bin reaches its comfortable capacity.
A simple label (Establishing, Growing, Thriving, At Capacity) that tells you where you are in the lifecycle without needing to interpret raw numbers yourself.
No — that's exactly why this estimator caps growth rather than showing endless exponential doubling. Real colonies slow down as they approach the food and space capacity of their bin, similar to how any population levels off once resources become the limiting factor.
Splitting into a second bin is the most common next step — move roughly half the worms and bedding into a new setup. You can also share worms with a friend getting started, or upgrade to a larger bin if you'd rather keep everything in one place.
This is a rough estimate assuming favorable conditions throughout. Cooler temperatures, inconsistent feeding, or a bin that's already near capacity for its size will all slow growth below what the calculator projects — that's normal, not a sign of a problem.
Yes — most starter orders are sold in round numbers (a quarter pound, half pound, or full pound), so use whichever is closest to what you remember ordering. The estimate is meant as a general guide, not a precise count.
Generally yes — more surface area and food capacity support a larger population before growth plateaus. Use our Worm Bin Size Calculator alongside this one if you're planning a bigger setup to match your household's needs.
