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Rainfall Units Converter

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Rainfall Convertions

Rainfall Units Converter
(inches/hour)

(gal/(h ft2))

(gal/(min ft2))
2.5 1.56 0.026
2.4 1.50 0.025
2.3 1.43 0.024
2.2 1.37 0.023
2.1 1.31 0.022
2.0 1.25 0.021
1.9 1.18 0.020
1.8 1.12 0.019
1.7 1.06 0.018
1.6 1.00 0.017
1.5 0.94 0.016
1.4 0.87 0.015
1.3 0.81 0.014
1.2 0.75 0.013
1.1 0.69 0.011
1.0 0.62 0.010
  • 1 in (inch) = 25.4 mm
  • 1 gph = 0.0012 l/s
  • 1 ft2 = 0.093 m2

Weight of Rainfall

Rainfall - Weights
Amount of Rain
(in)

Weight of Water
(lb/ft2)

6 31.2
5 26.0
4 20.8
3 15.6
2 10.4
1 5.2
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Related Topics

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Capacities of vertical downspouts when draining roof areas in rainfall.

Rainfall on Roofs and Gutter Slopes

Draining of roof areas and recommended gutter slopes

Storm-Water Conductors

Roof drain capacities.

Storm-Water Runoff Coefficients vs. Surface

Storm-water runoff coefficients for various surfaces

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