Free tools · No account needed. Use it in your browser.

Terrarium and aquarium electricity costs

A light may run during the day, a filter around the clock and a heater only when needed. Enter each device separately to see what their combined electricity use could cost.

This calculator needs JavaScript, so the example fields are disabled. To calculate daily costs yourself, multiply watts by daily running hours, divide by 1,000 and multiply by your electricity unit rate.

Your electricity price per kWh

Currency

0.35 is an example. Use the unit rate shown on your electricity bill.

These are example values, not equipment or lighting recommendations. Check the wattage on each device and use the running time for your own setup.

Lighting

Power (W)

Hours per day (h)

Heating

Power (W)

Hours per day (h)

Filter or pump

Power (W)

Hours per day (h)

Another device

Power (W)

Hours per day (h)

Estimating running time

For a light on a timer, enter the hours it is switched on. A filter running continuously uses 24 hours.

A thermostat-controlled heater draws its rated power during its heating cycles. A suitable plug-in energy meter can help measure actual consumption over several days. Winter and summer use may differ considerably.

The care guide for your animal explains its temperature, lighting and filtration needs. These needs determine how the equipment runs. This calculator estimates costs; it does not assess whether a setup meets an animal’s needs.

The fixed standing charge on your electricity tariff is excluded. A variable tariff needs an appropriate average unit rate. The yearly estimate assumes the same running hours on all 365 days.