Almanac · About This Almanac
Editorial
Calculate Outdoors exists to answer a question that activity calculators cannot: whether the conditions support going out at all, and what they will cost you.
Most outdoor calculators are activity calculators. They take a distance and a pace and return a time. That is useful once you have already decided to go.
This site sits one layer above that. It takes the environment as its input — ultraviolet, daylight, temperature, humidity — and returns a decision. Four instruments, organised by condition rather than by activity, with reference material explaining the physiology and physics each one runs on.
Sun, daylight, heat and effort are the four variables that determine an outdoor day before the choice of activity does. A hiker, a cyclist, a runner and someone walking a dog face the same UV index and the same civil dusk. Organising around the environment rather than the sport removes duplication and makes the tools genuinely portable across activities.
Every instrument on this site is built on a published model, and each calculator page names the model it uses and states its limitations.
None of these produce clinical-grade output, and each calculator page says so explicitly rather than burying it.
Calculate Outdoors is an independent publication produced in Pittsburgh, Pennsylvania. Articles are researched against primary literature and public standards documentation, with mechanisms explained rather than asserted. Where evidence is contested — and in several of these subjects it genuinely is — the article says so instead of picking a side for narrative convenience.
Two sources, both disclosed. Display advertising through Google AdSense, and affiliate commission through the Amazon Services LLC Associates Program on the gear page. Neither influences editorial content, and no advertiser or affiliate partner reviews articles before publication.
Questions and corrections: contact page.