Rainfall Volume Calculator

Calculate the volume of rain water based on rainfall amount and catchment area.
Volume (Liters)
Volume (Gallons)

Features

  • Calculate the volume of water harvested from a roof or land area.
  • Supports metric (mm, m²) and imperial (inches, ft², acres) units.
  • Real-time calculation of Liters and Gallons.

How to Use

  1. Enter the amount of rainfall (in mm or inches).
  2. Enter the area size (roof size, land size).
  3. View the total volume of water collected.