How does the Cultivation cost calculator work?

The grow room electricity calculator uses the following equation to calculate the cost of electricity during your grow:

Cost of Electricity x # of Hrs. x (Watts / 1000) = Total Cost

Cost of Electricity

This is the cost of electricity that you pay and you can usually find it on your bill.

It’s measured in kWh.

However, if you can’t find this, you can use the national average to get a rough idea, which is $0.12 in the USA and $0.10 in Canada.

Number of Hours
(for vegetative and flowering)

This is the number of hours that you will be running your electrical appliance for every day.

During the Vegetative stage, most growers opt to keep their grow lights on for 18 hours and then switch them off for 12 to give the plants a rest.

However, some growers like to leave their lights on for 24 hours every day as it speeds up the vegetative growth – just be mindful that this light-dark cycle will increase your electricity bill.

Watts

This is the number of watts that your electrical appliance draws from the wall.

This could be your grow light, a rotating desk fan, or an exhaust that’s sucking the air out of your grow tent.

This value is then divided by 1000 to convert the number of watts used to Kilo Watts (kW).

Cultivation Cost Calculator

Complete the two fields below and the calculator will tell you the cost of your electricity during the Vegetation and Flowering stages.

The average cost of electricity in the US is $0.12 kw/h and $0.10 kWh in Canada. If you don’t know the kw/h of your electricty, you can use these averages to get a rough idea.
The number of watts that your appliance draws from the wall. This could be your grow light, rotating fan of exhaust.
The most common light-dark cycle used during the vegetative stage is 18 hour on, 12 hours off (18-12) However, 24-0 is sometimes used to speed up vegetative growth, resulting in higher electricity bills.
The light-dark cycle required during the flowering stage is 12 hour on, 12 hours off.
Estimated Cost of Electricity During Vegetation Stage

Daily cost

$0.00

Weekly cost

$0.00

Monthly cost

$0.00

Note: depending on the strain and growing techniques, the vegetation phase can last anywhere from 2 to 8+ weeks.
Estimated Cost of Electricity During Flowering Stage

Daily cost

$0.00

Weekly cost

$0.00

Monthly cost

$0.00

Note: the values assume that you have your grow light running for 12 hours Depending on the strain, growing techniques and harvest time, the flowering phase can last anywhere from 5 to 16+ weeks.

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