Solar Power Calculator

Solar Power Calculator

Last Power Bill:
Cost per kWh:
Solar System Size:
Hours of Peak Sunlight:
Feed-In Tariff per kWh (optional):
Need multiple calculators?
We offer bulk pricing on orders over 10 calculators. Contact Us
Not what you're looking for?
Get your own custom-built calculator. Contact Us

Get this calculator for your site:

Calculations - 100/month. Required link back.


Calculations - unlimited. Customizable. No link.

Solar Power Formula:

kWh Produced per Day = Solar System Size * .8 * Peak Daylight Hours
Daily Savings = kWh Produced per Day * Price per kWh
kWh Used per month = Total Bill / Price per kWh
kWh Produced per Month = Daily * 30

Solar Power Definition

Use our free Solar Power Calculator to find out how a solar power system can benefit your home or business. It’s prudent to do research and determine whether investing in solar power is going to be a practical solution for your energy needs.

Our online solar power calculator is convenient for people who don’t have a calculator handy or who aren’t familiar with the formula required to make power calculations themselves. We provide this free service because we want to empower people to make their own decisions about environmentally friendly sources of energy.

Going Green with Solar Power

As people become more concerned about the environment and our reliance on fossil fuels to provide the necessary power to keep our society going, interest is growing in solar power technology. A solar power company can install a sunlight-harvesting system on the roof of your home or your company, where it will be unobtrusive.

Depending on how big the system is and how much sunlight you typically see each day in your location, you could begin saving a significant amount of money. Many people are interested in solar power not just for the money they will save, but because they are committed to saving the planet.

Solar Power for the Future

By shifting over to greener sources of fuel, we can do our part to make sure that future generations won’t have to live with unhealthy pollution. We also can reduce our dependence on oil-producing countries, which is a major priority for people who are concerned with peaceful international relations.

Using Our Solar Power Calculator

  • Type in the amount of money you were charged in your last power bill.
  • Enter the cost per kWh that the utility charges you.
  • Use the “Solar System” drop-down menu to select the size of your solar system, such as “1 kW” or 5 kW.” The bigger your system, the more power it can potentially generate under sunny skies.
  • Type in the number of hours of peak sunlight in your location. More sunlight means you can generate more power each day.
  • You also have the option to enter your feed-in tariff per kWh.
  • Click the “Calculate” button to instantly get the results.

Calculator Results

You will see how much solar power you generate on a daily basis in terms of kWh, and how much money you will save each day. What’s more, you will see how much energy you use each month and how much energy you generate.

You can perform the solar power calculations as many times as you like. Try experimenting by typing in different hours of peak sunlight to help you imagine what your utility bill will look like if you live or work in a different location. You can also see how much more you can save with a larger solar power system, or if you can get by with a smaller system.

Please feel free to print out the results that you obtain with our calculator to use as a reference when you consult with solar power system installers. You may also be interested in the Solar Panel Shadow Calculator.

How to Calculate Solar Power

Let's be honest - sometimes the best solar power calculator is the one that is easy to use and doesn't require us to even know what the solar power formula is in the first place! But if you want to know the exact formula for calculating solar power then please check out the "Formula" box above.

Add a Free Solar Power Calculator Widget to Your Site!

You can get a free online solar power calculator for your website and you don't even have to download the solar power calculator - you can just copy and paste! The solar power calculator exactly as you see it above is 100% free for you to use. If you want to customize the colors, size, and more to better fit your site, then pricing starts at just $29.99 for a one time purchase. Click the "Customize" button above to learn more!