RainYard Tools
Unit helper
Rainfall Depth Converter
Convert rainfall depth across inches, feet, millimeters, and gallons per square foot.
Before you calculate
Use it when a guide, weather report, or plan uses different units.
- 1 inch equals 25.4 millimeters.
- 1 inch over 1 sq ft is about 0.623 gallons.
- Depth is not the same as intensity.
Millimeters25.4 mmMetric rainfall depth.
Feet0.083 ftDepth in feet.
Gallons per sq ft0.623 galVolume over one square foot.
1
Enter rainfall in inches.
2
Use the converted depth or gallons per square foot.
3
Multiply by area for total volume.