How Many Solar Panels Do I Need? Formula and Examples
Work out how many solar panels you need from your yearly electricity use, peak sun hours and panel wattage, with worked examples for 6,000, 10,500 and 15,000 kWh.
Electrical, Solar and Energy
Roofing, Concrete and Masonry
How to Calculate Rafter Length: Formula, Factors and Examples
Calculate rafter length from rise and run, or from a pitch with a simple factor. Includes a factor table and worked examples.
Marketing and Advertising
What Is Break-Even ROAS? Formula, Examples and How to Use It
Break-even ROAS is the return on ad spend at which an order pays for itself. Learn the formula, see worked examples and find your target ROAS.
Roofing, Concrete and Masonry
How to Calculate Roof Pitch: Formula, Chart and Examples
Learn how to calculate roof pitch from rise and run, with the formula, a pitch-to-angle chart and worked examples.