#### PurpleGunRack

##### Well-Known Member

I never really saw a point in calculating g per watt, g per plant, g per m2 etc. because they all leave out major factors that affects the turnover the equation.

I've been wanting to be able to use the statistics and use them to calculate a single number that describes the overall efficiency of the grow, but the number *must* be universally comparative so the guy growing in a 2x2 closet can be compared to the commercial warehouse scale grow without favoring either in any way.

I've been calculating different statistics and thought I came up with a nice formulae for a grow profitability degree, but because I based it on variable costs per g, I eventually realized that different currencies and their rising/falling means it won't be universally comparative.

Which also made me realize that money isn't a static unit and therefore worthless in a comparative formulae unless you sell your product, in which case you can calculate the profit per g and all the other profitability numbers, but for personal growing that won't work other than holding up against commercial prices to see how much you save, but the comparative commercial cannabis price differs a lot depending on quality and location.

Lately I've been experimenting more and more with SoG growing and became increasingly interested in the profitability of growing.

First I came up with calculating the

**or the**

*g per m2 per day***, the first is a nice factor to have and what outdoor/greenhouse growers should use.**

*g per m2 per kWh*The problem is that the first leaves out power consumption and the second leaves out time.

So I calculated the total combined KwH consumption for the grow (lights, extraction, fans etc. from seed to harvest) and found the

**.**

*g per m2 per day per kWh*However, this will always be a very low number 0,00XXXX, so to get a more tangible factor or degree or ratio or whatever you wanna call it, I multiplied it by 1000 to get a single digit number (with 2 decimals).

Now this is a number worth using since it's easy to read/understand and comparative for all grow room sizes, lighting levels and time frames.

I fiddled around with the numbers a little and hastily decided on an average of 2-4, so anything below is considered poor and anything above is considered good.

I just based it losely on a roughly estimated average of medium yielders in the hands of experienced growers and high yielders in the hands of beginners.

Any idea to how this is most accurate and fair is much appreciated, it is of course possible to adjust the values to different strain types and grow styles.

This part is just a guideline and doesn't really matter, obviously the higher the number the better, but if you're consistently under 2 you might want to try and change something.

The cost of nutes, medium, seeds/clone factory or the cost of the equipment, I found these to hard to work in the formulae, but I'm open for suggestions

Nor does it take potency or the cannabinoid/terpene composition, so you have to factor in personal preference in how much the finicky cookie strain or lanky landrace sativa is worth over the loss in yield vs. a high yield strain.

Very useful if you increase your lighting wattage or split test pheno types, so you can se the relative increase/decrease or difference.

You can base your calculations on a single plant, since you know how many plants of that size you'd be able to fit in your space, so you just multiply the yield from that one plant with that number

Comparing strains/phenos, grows, growers, lights, methods etc. this way can be quite interesting

So far I'm calling it Grow Turnover Ratio, but I'm very open for name suggestions

So, once the thinking part was done it was time to create a spreadsheet, so now I can just fill out the white cells and never have to actually do the calculations again

The numbers used are from my PurpleGunRack's Revenge Grow

1,44 m2 is a 120x120cm (4x4) tent