This stepbystep tutorial shows how to use a spreadsheet to estimate daily runoff amounts using the NRCS curve number method. This video was created by Josh Everett in 2022, as part of the class "Soil, Water, and Weather" at Oklahoma Sate University. For more information, download the free etextbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at: https://osf.io/z4rbt/.