# Pet care calculators and guides

> Every tool is built from published husbandry standards and veterinary reference ranges. Each page shows its units, assumptions, and sources next to the result, so you can verify the math behind the answer.

## Tools

- **[Reptile UVB Calculator](https://petguidecalc-dev.pages.dev/reptile/uvb-calculator/)** — Estimate the mounting distance and UV index for a T5 HO, T8, or compact UVB bulb across six common reptile species.
- **[Snake Starter Guide](https://petguidecalc-dev.pages.dev/reptile/snake-care/)** — Enclosure size, temperature gradient, and humidity targets for ball pythons and corn snakes, compared side by side.
- **[Aquarium Fish Compatibility Checker](https://petguidecalc-dev.pages.dev/aquarium/mix-calculator/)** — Compatibility verdicts with reasons for 12 common freshwater community fish, based on temperature and temperament rules.
- **[Hamster Cage Size Calculator](https://petguidecalc-dev.pages.dev/hamster/cage-size-calculator/)** — Minimum and recommended floor areas for Syrian and dwarf hamsters, with cm/in conversion and shortfall guidance.

## How the numbers work

The calculators use published reference ranges — Ferguson-zone UV exposure guides, European hamster floor-area standards, and standard community-fish temperature and temperament rules.

Where a value is an estimate rather than a measurement, the page says so and tells you how to verify it, for example with a Solarmeter 6.5 for UV index.

## Frequently asked questions

**Q: Are the calculators free to use?**

Yes. No accounts, no paywalls, and no data collection beyond basic site analytics.

**Q: Are the results medical advice?**

No. PetGuideCalc tools are educational planning resources. Consult a qualified veterinarian for health concerns.

**Q: How do I verify a result?**

Every page lists the sources behind its values. Measurements such as UV index should be confirmed with calibrated instruments.

_PetGuideCalc — https://petguidecalc-dev.pages.dev_