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Wind Chill Calculator

NWS formula for wind chill (°F). Free online Wind Chill Calculator. Calculate wind chill online — fast, accurate, mobile-friendly, no signup needed.

Wind chill (°F)
19.027305

Derivation

  1. ├── 01GivenT = 30, v = 15
  2. ├── 02Formula35.74+.6215 × t-35.75 × (a)^(.16)+.4275 × t × (a)^(.16)
  3. └── 03Compute Wind chill (°F)19.027305
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§01What is

Understanding the Wind Chill Calculator

The Wind Chill Calculator computes Wind chill (°F) from 2 inputs: temp (°f), wind (mph). NWS formula for wind chill (°F).

Quick calculators for the math that shouldn’t need a notepad — instant, accurate, private to your browser. The Wind Chill Calculator sits in that toolkit — it NWS formula for wind chill (°F). Enter your numbers above and the result updates instantly; every step of the math is shown in the Derivation panel so you can see exactly how the answer was reached.

§02The Formula

How it’s calculated

35.74+.6215 × t-35.75 × (a)^(.16)+.4275 × t × (a)^(.16)

Where

T
Temp (°F)
v
Wind (mph)
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Temp (°F) = 30, Wind (mph) = 15.

  1. 01Start by noting the input — Temp (°F): 30.
  2. 02Start by noting the input — Wind (mph): 15.
  3. 03Substitute these values into the formula: 35.74+.6215 × t-35.75 × (a)^(.16)+.4275 × t × (a)^(.16)
  4. 04Compute Wind chill (°F): the calculator returns 19.0273.
  5. 05Cross-check the answer by opening the Derivation panel above — every line of math is shown so you can follow the computation end-to-end.
§04Variants

Common Wind Chill Problems

The formula gets rearranged depending on which variable you need. Here are the patterns you’ll run into in the real world — find the one that matches your problem and follow the worked steps.

01 · PATTERN

Temp (°F) halved

T = 15 (from 30)

Keep every other input at its default and halve the temp (°f). See how wind chill (°f) responds.

  1. 01New Temp (°F): 15
  2. 02Baseline Wind chill (°F): 19.0273
  3. 03New Wind chill (°F): -0.185325
  4. 04Wind chill (°F) decreases by 101% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Temp (°F) doubled

T = 60 (from 30)

Keep every other input at its default and double the temp (°f). See how wind chill (°f) responds.

  1. 01New Temp (°F): 60
  2. 02Baseline Wind chill (°F): 19.0273
  3. 03New Wind chill (°F): 57.4526
  4. 04Wind chill (°F) increases by 201.9% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Wind (mph) halved

v = 7.5 (from 15)

Keep every other input at its default and halve the wind (mph). See how wind chill (°f) responds.

  1. 01New Wind (mph): 7.5
  2. 02Baseline Wind chill (°F): 19.0273
  3. 03New Wind chill (°F): 22.739
  4. 04Wind chill (°F) increases by 19.5% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Wind (mph) doubled

v = 30 (from 15)

Keep every other input at its default and double the wind (mph). See how wind chill (°f) responds.

  1. 01New Wind (mph): 30
  2. 02Baseline Wind chill (°F): 19.0273
  3. 03New Wind chill (°F): 14.8803
  4. 04Wind chill (°F) decreases by 21.8% → use this sensitivity to plan for real-world variation.
§05FAQ

Frequently asked questions

Yes. The calculator implements the standard formula as documented and returns exact floating-point results. No approximations are used unless noted in the formula.
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