LED Savings Calculator

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Calculate the potential savings from switching to LED light bulbs, considering factors like bulb wattage, usage hours, and electricity cost.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Old Bulb Wattage (Watts), LED Bulb Wattage (Watts), Daily Usage (Hours), Electricity Cost (USD/kWh), and Days of Use Per Year in the units shown.

Step 2

Read LED Bulb Daily Energy Consumption, Old Bulb Daily Energy Consumption, Daily Energy Saved, Daily Savings, and Annual Savings in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

Example calculations

See the inputs and their calculated results.

Typical Living Room

Old Bulb Wattage (Watts): 60; LED Bulb Wattage (Watts): 9; Daily Usage (Hours): 3; Electricity Cost (USD/kWh): 0.15; Days of Use Per Year: 365

LED Bulb Daily Energy Consumption: 0.027 kWh; Old Bulb Daily Energy Consumption: 0.18 kWh; Daily Energy Saved: 0.153 kWh; Daily Savings: 0.02295 USD; Annual Savings: 8.37675 USD

Kitchen Lights

Old Bulb Wattage (Watts): 75; LED Bulb Wattage (Watts): 12; Daily Usage (Hours): 4; Electricity Cost (USD/kWh): 0.12; Days of Use Per Year: 365

LED Bulb Daily Energy Consumption: 0.048 kWh; Old Bulb Daily Energy Consumption: 0.3 kWh; Daily Energy Saved: 0.252 kWh; Daily Savings: 0.03024 USD; Annual Savings: 11.0376 USD

Outdoor Lights

Old Bulb Wattage (Watts): 100; LED Bulb Wattage (Watts): 15; Daily Usage (Hours): 6; Electricity Cost (USD/kWh): 0.18; Days of Use Per Year: 365

LED Bulb Daily Energy Consumption: 0.09 kWh; Old Bulb Daily Energy Consumption: 0.6 kWh; Daily Energy Saved: 0.51 kWh; Daily Savings: 0.0918 USD; Annual Savings: 33.507 USD

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