Sweat Rate Calculator
Estimate how much you sweat per hour to plan fluid intake.
Your result
Weigh yourself without clothes, before and after exercise, and dry off first. Use this to plan drinks for future sessions; very heavy sweating may need electrolytes too.
Medical disclaimer: This tool is for education and is not medical advice. Read more.
Search by intent
Find this tool when you want to:
Learn more
Heart Rate Zones Explained
Train smarter by understanding the five zones and what each does.
Fitness & ExerciseHow to Find Your Maximum Heart Rate
Compare the common formulas and learn why they are only estimates.
Fitness & ExerciseWhat Is VO2 Max and How Can You Improve It?
Aerobic capacity is one of the strongest predictors of longevity.
Frequently asked questions
What does the Sweat Rate Calculator do?
Estimate how much you sweat per hour to plan fluid intake. Enter your values and the result and chart update instantly.
How accurate is it?
It uses published, widely used formulas. Results are estimates for education and planning, not a diagnosis. Talk to a qualified clinician about decisions affecting your health.
Is my information stored or shared?
No. All calculations run in your browser and nothing you type is sent to a server or saved.
What can I search to find this tool?
People find it by searching for: how much do i sweat; sweat rate test; fluid replacement during exercise.