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Welcome to the Urban Worm Calculator!

  • Learn how long it will take for your worms to reproduce
  • Learn how much vermicompost and worm castings they will create
  • Learn how much money your worm stock is worth on a month-to-month basis
  • Understand how many worms you can sell in your business and still maintain or grow your population


The Urban Worm Calculator is completely dependent upon the accuracy of the inputs you provide. Unrealistic input will provide an unrealistic output. Do not use this calculator as a sole source for making any business decisions.

Got Questions about How the Urban Worm Calculator Works?

Read the Urban Worm Calculator Guide

African Nightcrawlers are not intended for vermicomposting.

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The 2019 Vermicomposter's Starter Guide

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Your roadmap to a successful beginning in vermicomposting.

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