How Much Does Etsy Take Per Sale? Etsy Fees Explained
A line-by-line look at Etsy’s listing, transaction, payment processing and Offsite Ads fees, with worked examples on four sales.
Seller and Business
Home and Energy
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.
Home and Energy
How Many Bags of Concrete in a Cubic Yard? 40, 60 and 80 lb Bags
A cubic yard of concrete is about 90 bags of 40 lb, 60 bags of 60 lb or 45 bags of 80 lb. See where the numbers come from and how to choose a bag size.
Home and Energy
How Much Concrete Do I Need for a Slab? A 10×10 Example
Work out how much concrete a slab needs, with a full 10 x 10 foot example in cubic feet, cubic yards and bags, plus a waste allowance.
Seller and Business
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.
Seller and Business
Markup vs Margin: What Is the Difference? Formulas and Examples
Markup and margin both describe profit, but they divide by different numbers. Here are the formulas, worked examples and a conversion table.
Pets and Hobby
Dog Years to Human Years: Why the 7x Rule Is a Myth
Why multiplying a dog’s age by 7 is wrong. See the size-based chart, the UC San Diego formula and a free dog age calculator.
Home and Energy
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.
Seller and Business
How eBay Fees Work in 2026: What eBay Takes From Every Sale
How eBay seller fees work in 2026: the final value fee, the per-order fee and worked examples. Learn what you keep from a sale.