Why I built this.

I'm a product manager in the IT industry, with an undergraduate degree in math and a master's in international finance. I got serious about my health and started focusing on sleep, trying to figure out what worked. I looked at the calculators that already existed and felt they could be improved. I wanted formulas present, assumptions transparent, and sources cited. That's what I've tried to build.

I'm not a sleep doctor or any kind of doctor. I'm a guy on the internet who did the research and built some calculators. I run a handful of niche calculator sites in my spare time because I enjoy the work. Every assumption is shown, every number has a source linked. You change the inputs, you make the call.

Every formula and its sources live on the methodology page.

If you spot something wrong, email me. I fix things when the data changes.

These tools are for informational purposes only and not a substitute for medical advice. For sleep disorders or health concerns, talk to a healthcare provider.