Hey guys was wanting to know how to get an estimate of how much it would cost me to run one 400 watt hps thanks!

# How to calculate how much my hps will cost me on eletric

Per month roughly cost is about 25-40$ to run unless on 18/6 it may be closer to 30-75$ per month, @Niala @MacGyverStoner can you guys help out here please and thank you

Iâ€™ll be growing an auto so itâ€™ll be on 18-6 light schedule

So probably roughly any where from 30-75$ to run per month

It depend on how much is the rate by kilowatt/hour that charge your local electricity distributor , it will be shown on your electricity bill @Swan1234

Ok Iâ€™ll have to look inTo that.ď¸Ź

The formula is : Number of hours of utilisation Ă— Number of days Ă—( Number of watts have your lights Ă·1000 in your case 0.4). Thatâ€™s gone a give you how much kilowatt your lamp consum, for 30 days on a 18/6 schedule itâ€™s 216 kilowatt multiply by rate from your local electricity distributor and â€śvoilĂ â€ť you gone a know how much it will cost you approximately.

Hoping thatâ€™s helping you, @Swan1234

Youâ€™re welcome

This is just a basic way to knowâ€¦ had an old-school grower tell me this.

The first numbers in the size of your bulb generally will tell you what itâ€™s going to cost you.

100 - $10

250 - $25

400 - $40

600 - $60

1000 - $100

1200 - $120

And that is very, very close, my 400 watt HPS, cost me around $40 a month to run.