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DC Water Heating Temperatures

How many watts will it take to heat a given amount of water?


Use the handy chart below that our General Manager David McDaris created to figure how many watts per hour you need to heat water using a DC water heating element. Whether it's a stock tank, water for chickens or other animals, fountain or a converted water heater for your home, this chart will help in sizing your water heating element.


If it's overheating you're worried about, make sure you add a thermostat to your setup. To keep water from freezing, add our freeze-stat.

How many watts does it take to heat a gallon of water?

As a general rule of thumb, it requires 2.47 watts of power to raise the temperature of one gallon of water one degree in one hour.

Formula: 2.47 Watts x 1 Gallon x 1°F in 1 Hour

Wattage Chart

DC Water Heating Wattage Chart

Looking for the right DC Water Heating Element?

We have different styles and voltages that are right for the job.

You can compare max 4 products.