About MewMewo

MewMewo is a free collection of calculators and quick-reference tools for people who share their home with dogs and cats. We turn published veterinary formulas into simple tools that work on a phone, and we link to the original source on every page. MewMewo is not a veterinary clinic and does not give medical advice — our tools help you understand numbers and decide when to call your vet.

How we build our calculators

Every calculator uses a published formula that we show on the page, so you can check the math yourself. Where a tool uses prices or rates, we name the source (for example the U.S. Energy Information Administration) and the date of the data. When the source publishes new numbers, the site is updated.

Our promise

• Free to use, no sign-up.
• Formulas shown on every page.
• Sources and dates listed for all data.
• Corrections welcome — tell us if something looks wrong.