Rain Gauge Volume Calculator: How Much Water Did Your Gauge Catch?
Depth alone does not say how much water you collected. The gauge's opening area turns depth into volume.
What is the Rain Gauge Volume Calculator?
A rain gauge measures depth, but the water it holds depends on its opening size. Enter the gauge diameter and the measured depth and this tool calculates the collected volume in millilitres.
How to use it
- Enter your values in the fields provided.
- Click Calculate Rain Volume.
- Read the result and adjust an input if you want a different outcome.
Worked example
A 10 cm gauge collecting 5 mm of rain holds about 39.27 ml of water.
How much water is 5 mm in a 10 cm gauge?
The opening area is about 78.54 square centimetres, and 5 mm is 0.5 cm deep, giving about 39.27 ml.
Frequently asked questions
What do I enter to get a result?
Fill in every field with your own numbers or choices, then run the tool. Empty number fields count as zero, so check them before you trust the output.
Can I reuse this result elsewhere?
Yes. The result is calculated in your browser from the values you entered, so you can copy the numbers into your own notes or plan.