Feels Like Temperature Calculator

Reviewed by the CalculatorHub team, edited by James Graham. Method from U.S. National Weather Service, Heat Index. Last verified 2026-06-23.

The Feels Like Temperature Calculator computes feels like temperature from the relation apparent temp = air temp + 0.33 x vapour pressure - 0.70 x wind speed - 4.00. It takes 3 inputs (air temperature in C, relative humidity in %, wind speed in m/s) and returns the feels like temperature. Because this is a pure mathematical or physical formula rather than a jurisdiction-specific rule, the result never changes over time: the same inputs always produce the same answer, so you can rely on it whether you are checking homework, sizing a design, or sanity-checking another tool. Enter your values in the fields below and the result updates instantly; you can also share a permalink that pre-fills the exact calculation, which is useful for teaching, reports, or collaboration. For example, with air temperature = 25 C, relative humidity = 50 %, wind speed = 3 m/s, the feels like temperature works out to 24.111189, and the worked example further down the page shows every step so you can follow the arithmetic and reproduce it by hand. The method is the standard form documented by U.S. National Weather Service, Heat Index, and the figure above each result carries the date it was last verified. This tool is general information and is not a substitute for professional engineering, medical, financial, or scientific advice; always check critical results against the primary source and your own judgement.