# Recipes calculator

## How to use it

Enter your needs in the **yellow** boxes

The quantities of inputs required will appear in the **light blue** boxes

Costs in the **dark blue** boxes

Details in the **white** boxes

## Calculate water saturation

Possibilities of substrates are endless. To determine the expansion and absorption capacity of a new substrate, you can use the method below. For obvious reasons, it is clever to automate these calculations.

**Take a sample of 100ml of dry substrate and weigh it**

100ml dry = *50*g

**By soaking or cooking, saturate the substrate with water. Let drain 15 minutes and measure the new volume**

100ml dry = *200*ml wet

Expansion ratio = Wet volume ÷ Dry volume

*200*/100 = *2*

**Weigh the wet sample, and determine the amount of water**

*50*g dry = *125*g wet

Volume of water absorbed (per 100ml) = Wet weight - Dry weight

*125* - *50* = *75*g = *75*ml^{1)}

**Conversion for 1 liter of dry substrate**

*75*ml water / 0.1L dry = *750*ml / L dry

**Calculate the amount of substrate necessary **

X = Number of one-liter pots

Substrate need = (X ÷ Expansion ratio) * 70%^{2)}

Substrate need = (X/*2*) * 0.70

**Calculate the water requirement**

Water need = Water absorption (per liter) * Volume of substrate moistened

Water need = *750* *((X/*2*) * 0.70)

^{1)}
For water, the units of weight and volume are interchangeable

^{2)}
Allow 30% of free space to break the mycelium afterwards