Cloud Base Table: Cloud base height by Surface temperature
Reference table of cloud base height for Cloud Base across a range of surface temperature values — exact, engine-computed figures you can read off at a glance.
Cloud Base Calculator
Verified formula Updated Jun 2026 Private — runs on your device
Verified formula
Private
Cloud base height
1,250
- In feet
- 4,101
For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.
How to use the Cloud Base Calculator
The Cloud Base Calculator works out your cloud base height, along with 1 related figure in an instant. Enter surface temperature and dew point and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.
- Enter the surface temperature.
- Enter the dew point.
- Read off your cloud base height, together with in feet — the calculator updates automatically, with no button to press.
Formula
The Cloud Base Calculator uses the formula:
Cloud base height = (Surface temperature - Dew point) × 125
Worked example
For example, with surface temperature of 25 °C and dew point of 15 °C, the cloud base height is 1,250.
| Surface temperature | 25 °C |
|---|---|
| Dew point | 15 °C |
| Cloud base height | 1,250 |
|---|---|
| In feet | 4,101 |
Results are estimates for educational use, not professional advice.
Frequently asked questions
Multiply the gap between temperature and dew point by about 125 metres per °C. A 10°C spread suggests a cloud base around 1,250 m.
Rising air cools until it reaches the dew point and condenses into cloud. A wider spread means air must rise higher first.
It is a useful rule of thumb for convective cloud. Real cloud bases vary with conditions and air mass.
Pilots estimate cloud base to judge ceilings and visibility, important for safe flight planning under visual rules.
The Cloud Base Calculator uses the formula: Cloud base height = (Surface temperature - Dew point) × 125. For example, with surface temperature of 25 °C and dew point of 15 °C, the cloud base height is 1,250.
Enter the surface temperature. Enter the dew point. Read off your cloud base height, together with in feet — the calculator updates automatically, with no button to press.
Related guides
How to Calculate Cloud Base: Formula, Steps & Examples
Learn how to calculate Cloud Base — the formula explained step by step, with worked examples and a free calculator to check your answer.