Calculator Servicescalculatorservices.com

Dew Point Calculator

Magnus formula dew point. Free online Dew Point Calculator. Calculate dew point online — fast, accurate, mobile-friendly, no signup needed.

Dew point (°C)
16.68425

Derivation

  1. ├── 01GivenT = 25, RH = 60
  2. ├── 02Formula237.7 × n / (17.27-n)
  3. └── 03Compute Dew point (°C)16.68425
Did you know?

Every calculator here runs 100% in your browser — nothing is sent to a server or stored in a database.

§01What is

Understanding the Dew Point Calculator

The Dew Point Calculator computes Dew point (°C) from 2 inputs: temperature (°c), humidity (%). Magnus formula dew point.

Quick calculators for the math that shouldn’t need a notepad — instant, accurate, private to your browser. The Dew Point Calculator sits in that toolkit — it magnus formula dew point. 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

237.7 × n / (17.27-n)

Where

T
Temperature (°C)
RH
Humidity (%)
§03Practical Example

Step-by-step walkthrough

Scenario

Apply the formula to a realistic set of inputs: Temperature (°C) = 25, Humidity (%) = 60.

  1. 01Start by noting the input — Temperature (°C): 25.
  2. 02Start by noting the input — Humidity (%): 60.
  3. 03Substitute these values into the formula: 237.7 × n / (17.27-n)
  4. 04Compute Dew point (°C): the calculator returns 16.6842.
  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 Dew Point 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

Temperature (°C) halved

T = 12.5 (from 25)

Keep every other input at its default and halve the temperature (°c). See how dew point (°c) responds.

  1. 01New Temperature (°C): 12.5
  2. 02Baseline Dew point (°C): 16.6842
  3. 03New Dew point (°C): 4.94542
  4. 04Dew point (°C) decreases by 70.4% → use this sensitivity to plan for real-world variation.
02 · PATTERN

Temperature (°C) doubled

T = 50 (from 25)

Keep every other input at its default and double the temperature (°c). See how dew point (°c) responds.

  1. 01New Temperature (°C): 50
  2. 02Baseline Dew point (°C): 16.6842
  3. 03New Dew point (°C): 40.0561
  4. 04Dew point (°C) increases by 140.1% → use this sensitivity to plan for real-world variation.
03 · PATTERN

Humidity (%) halved

RH = 30 (from 60)

Keep every other input at its default and halve the humidity (%). See how dew point (°c) responds.

  1. 01New Humidity (%): 30
  2. 02Baseline Dew point (°C): 16.6842
  3. 03New Dew point (°C): 6.20767
  4. 04Dew point (°C) decreases by 62.8% → use this sensitivity to plan for real-world variation.
04 · PATTERN

Humidity (%) doubled

RH = 120 (from 60)

Keep every other input at its default and double the humidity (%). See how dew point (°c) responds.

  1. 01New Humidity (%): 120
  2. 02Baseline Dew point (°C): 16.6842
  3. 03New Dew point (°C): 28.1012
  4. 04Dew point (°C) increases by 68.4% → 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.
Your feedback

How useful was this calculator?

Your ratings stay in your browser — they help us learn which tools people actually rely on.

Rate it
Was this helpful?