Heat Index Equations Formulas Calculator

Weather - Temperature - Heat Stroke Cramps Exhaustion - Medical

Solving for heat index.
heat index equation using ambient dry bulb temperature and relative humidity
-6.83783 x 10-3
-5.481717 x 10-2
-1.22874 x 10-3
8.5282 x 10-4
-1.99 x 10-6
The equation requires the temperature to be greater than 80 degrees Fahrenheit and the relative humidify to be above 40 percent. The equation approximates the heat index to within plus or minus 1.3 degrees Fahrenheit.


dry bulb temperature (T)
relative humidity (R)


dry bulb temperature (T)
= 0
= 0
relative humidity (R)
= 0
= 0


heat index (HI)

Other Units:

Physical Effect To Humans
80 to 90 °F 80 to 90 °C caution
Possible fatigue.
Physical activity could lead to heat cramps.
90 to 105 °F 80 to 90 °C extreme caution
Possible heat cramps and exhaustion.
Physical activity could lead to heat stroke.
105 to 130 °F 80 to 90 °C danger
Likely heat cramps and exhaustion.
Probable heat stroke.
above 130 °F 80 to 90 °C extreme danger
Imminent heat stroke.


Wikimedia Foundation, Inc. Heat Index. 2010. http://en.wikipedia.org/wiki/Heat_index.
Infant Growth Charts - Baby Percentiles Overtime Pay Rate Calculator Salary Hourly Pay Converter - Jobs Percent Off - Sale Discount Calculator Pay Raise Increase Calculator Linear Interpolation Calculator Dog Age Calculator Ideal Gas Law Calculator Capacitor Design Formulas Calculator Trigonometry Equations Calculator Pump Calculator - Water Hydraulics Child Height Predictor Calculator Work Equations Formulas Calculator Radioactive Material Equation Calculator Stokes Law Equations Calculator Gross Rent Multiplier Calculator Pendulum Equations Calculator Biochemical Oxygen Demand Towing: Weight Distribution Hitch Paycheck Calculator - Overtime Rate Momentum Impulse Calculator Percent Error Equations Calculator Rule of 72 Interest Calculator Ideal Reactor Design Calculator Thermal Diffusivity Calculator Statistics Equations Formulas Acoustic Flow Meter Calculator Manning Equations Calculator Z Score Calculator Thermal Expansion Calculator

Online Web Apps, Rich Internet Application, Technical Tools, Specifications, How to Guides, Training, Applications, Examples, Tutorials, Reviews, Answers, Test Review Resources, Analysis, Homework Solutions, Worksheets, Help, Data and Information for Engineers, Technicians, Teachers, Tutors, Researchers, K-12 Education, College and High School Students, Science Fair Projects and Scientists

By Jimmy Raymond
View Jimmy Rayamond's profile on LinkedIn

Contact: aj@ajdesigner.com

Privacy Policy, Disclaimer and Terms

Copyright 2002-2015