Independent solar planning
About Watt My Roof
Watt My Roof was created to make a complicated first question easier: how many solar panels might a particular home actually need?
Give homeowners a fast, understandable starting estimate without requiring a phone number, sales consultation or installation quote.
Why this calculator is different
Many quick estimates start and stop with square footage. Watt My Roof lets you begin with home size, then account for appliances and high-energy loads such as an electric dryer, central HVAC, water heating, an electric vehicle or a pool pump. If you know your actual monthly kWh, that bill-based number can replace the home estimate.
What we are—and what we are not
Watt My Roof is an independent educational website and planning tool. It is not a solar installer, equipment manufacturer, utility, engineering firm, financial adviser or permitting authority. The result is meant to help you understand the scale of a possible system and ask better questions.
A final solar design must be based on your complete electricity history, roof dimensions and condition, shade, local weather, equipment specifications, utility rules, permitting requirements and a professional site assessment.
Transparency before monetization
The calculator result is based on the inputs and formula described in our methodology. It is not adjusted to favor a company or product. If Watt My Roof earns money from an affiliate link, sponsorship or other commercial relationship, that relationship will be disclosed clearly. Read the full affiliate disclosure.
Our editorial standard
- State the important assumptions instead of hiding them.
- Separate educational estimates from professional installation advice.
- Correct material errors when they are identified.
- Label affiliate or sponsored relationships where readers encounter them.
- Prefer useful, specific explanations over inflated savings promises.