Energy Calculators

A collection of calculators and converters for energy efficiency and calculating energy costs.

Calculate the electricity cost and power usage of your home devices and electrical appliances.

Find out how much money and energy you can save by switching your regular light bulbs to LED light bulbs.

Convert between lumens and watts for a variety of different types of lightbulb.

Calculate how many miles your electric vehicle (EV) travels per kWh of electricity.

Calculate the efficiency of your electric vehicle and find out how much it costs to power your journey.

Convert between watts and lumens to calculate the brightness capacity of your lightbulb.

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Construction features

Calculate percentage additions and deductions with our handy calculator.

Discover the number one song and movie on the day you were born.