Calculate your estimated Heat Health Units™*

* The Heat Health Unit (HHU) calculator is an experimental tool intended solely for personal heat-exposure tracking. Its formulas, scores, and suggested equivalencies have not been scientifically or clinically validated. Results do not measure core body temperature, establish safe exposure limits, or predict health benefits. The calculator does not provide medical advice and is not intended to diagnose, treat, prevent, or monitor any medical condition. Do not use an HHU score to decide how hot or how long a session should be, or to continue despite discomfort or symptoms. Consult a qualified healthcare professional about whether heat exposure is appropriate for you.