---
title: Low Light Leaf Dew Point Calculator: Calculate when windows fog based on…
url: https://whatisnew.today/p/low-light-leaf-dew-point-calculator
---

# Low Light Leaf Dew Point Calculator

Calculate when windows fog based on temperature and humidity[Visit lowlightleaf.com (opens website)](https://whatisnew.today/go/low-light-leaf-dew-point-calculator?ref=p)
- #17 in Utilities
- [Utilities](https://whatisnew.today/c/utilities)
- [Free](https://whatisnew.today/pricing-models/free)
- Launched 30 Oct 2026

Verified clicks, 30 days
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Votes
0

Score
14.8 pts

Comments
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Picture 1 of 1: Low Light Leaf Dew Point Calculator social image

## About

Low Light Leaf Dew Point Calculator converts room temperature and relative humidity into the dew point, the temperature at which water starts to condense on surfaces. Enter your room temperature and humidity reading, and the tool shows you the dew point in Fahrenheit or Celsius. At 70°F and 40% humidity, for example, the dew point is about 45°F, so any window glass colder than that will fog or drip.

You can also measure the inside surface temperature of your window glass with an infrared thermometer and add it to the calculator to see whether that specific pane will fog at your current humidity. The result tells you the maximum humidity your coldest window can tolerate before it gets wet. A reference chart shows dew points across common indoor temperatures and humidity levels from 20% to 70% relative humidity.

The calculator uses the Magnus approximation with Alduchov and Eskridge constants, the same equations published by the University of Miami. It runs in your browser and is free to use, link to or cite.

The tool includes a glass temperature check that tells you which of your windows will actually fog, rather than just showing a general dew point chart. You can measure your window pane temperature with a surface or infrared thermometer to get a specific answer for your coldest glass.

Problem
Window condensation happens when cold glass meets humid air, but it's hard to know whether your windows will fog without calculating the exact dew point for your room conditions.

Solution
Enter your room temperature and humidity to find the dew point, then optionally add your window glass temperature to see if that specific pane will fog at your current humidity level.

Updated 2d ago

## Facts

Launch type
Free launch, badge required

Domain
lowlightleaf.com, not verified

Platforms
[Web](https://whatisnew.today/platforms/web)

Pricing
FreeFrom the maker's site, checked 31 Oct 2026

Built for
[Everyday users](https://whatisnew.today/for/everyone)

Tags
[No-code](https://whatisnew.today/t/no-code)

Maker
AS[Ashish Sharma](https://whatisnew.today/makers/sarmaasis)Since Oct 2026 · 318 products

## Updates
-

Launched on What’s New Today30 Oct 2026

Free launch.

## Comments

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