Energy Calculators

Energy calculators for electricity costs, lighting efficiency, and electric vehicle metrics. Save money and reduce your carbon footprint.

7 calculators available

7 calculators found

Electricity & Cost

3

Electricity Cost Calculator

Calculate monthly electricity cost from wattage, usage hours, and utility rate.

LED Savings Calculator

Calculate annual savings from switching to LED bulbs.

BTU Calculator

Estimate BTU cooling or heating capacity needed for a room.

Lighting

2

Lumens to Watts Calculator

Convert lumens to watts based on bulb type and efficacy.

Watts to Lumens Calculator

Convert watts to lumens based on bulb type and efficacy.

Electric Vehicles

2

Miles per kWh Calculator

Calculate electric vehicle efficiency in miles per kilowatt-hour.

MPGe Calculator

Calculate Miles Per Gallon equivalent for electric vehicles.

Which calculator do you need?

Understanding Electricity Costs

Electricity is measured in kilowatt-hours (kWh). One kWh equals 1,000 watts used for one hour. The average US residential rate is about $0.16/kWh, but rates vary significantly by region. Understanding your appliance wattage and usage patterns helps identify the biggest energy consumers in your home.

LED vs Traditional Lighting

LED bulbs use 75-80% less energy than incandescent bulbs and last 25 times longer. A 10W LED produces the same light as a 60W incandescent. The upfront cost is higher, but LEDs pay for themselves within months through energy savings. CFL bulbs fall between incandescent and LED in both efficiency and lifespan.