The rain data calculator

You can check your measurements by filling in the form below.
Here's how

1. Fill in one measurement marked A
 
2. Fill in one measurement marked B
 
3. Click Calculate and you will see what your other answers should be.
 
 

 

 
Measurement
Amount
A
Diameter of raingauge opening
millimetres
A
Area of opening
   millimetres 2
B
Weight of Water
 grams
B

Volume of water

 

 millilitres
C
Depth of water
? millimetres