Pets and Hobby Calculators
These calculators are for pet owners and makers. Convert your dog’s age into human years, or find the real cost of a 3D print, including power, printer wear and failed prints. Every tool is free and runs in your browser.
Calculators in this group
Who these calculators are for
Dog owners who are curious how old their dog is in human years.
Hobbyists who 3D print and want to know what each part really costs.
Makers who sell prints and need a price that covers failures and wear.
How these calculators work
Each page explains its formula in plain words, shows a worked example and lists its limits. Default values start as placeholders that you can edit, and the numbers you type stay in your browser.
Tips for accurate results
For the dog age tools, pick the size group that matches your dog’s adult weight, and remember that the two formulas can differ by several years because there is no single agreed chart. For the 3D printing tool, take the filament weight and print time from your slicer, use your own electricity rate and a realistic failure rate, and replace every default with your own numbers. All results are estimates and not professional or veterinary advice.
How to choose the right calculator
Use the dog age calculator when you are curious how your dog’s age compares with a person’s, and try both results to see the range. Use the 3D printing cost calculator when you want to know what a part costs you to make, or what to charge for it. If you sell your prints, the price it suggests can be a starting point, and the Etsy Fee Calculator and Markup vs Margin Calculator can help you check what is left after fees.
Both tools give estimates, so use them as a guide and not as a final answer.
Latest from the blog
Dog Years to Human Years: Why the 7x Rule Is a Myth
Read article: Dog Years to Human Years: Why the 7x Rule Is a MythWhy 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.
More answers
New to the tools? Read the FAQ page, and see the Disclaimer for the limits of the results. You can also browse all calculators.