Drainage Calculators

• Drainage Slide Rule — University of Minnesota Extension – Pocket-sized agricultural drainage calculator.
• Online Drainage Calculators Calculators for pipe size, area drained, flow rate calculator/converter, and drainage profitability analysis.
• Spreadsheets (ESTIMATE, SLOPE, and TILT) — Send an email request to Galehouse Drainage, Inc.
  • ESTIMATE: Calculates cuts and draw a profile for given stations, elevations, and grades. Calculates required slopes for different pipe materials. Prepares an estimate using your costs.
  • SLOPE: Helps determine how to increment the main/collector size for a pattern drained field with user specified lateral lengths. Determines slope needed for various main sizes as successive lateral flows are added. Also calculates required slopes for different pipe materials.
  • TILT: Displays the error created in the laser system if the machine tilts to the side
• Prinsco Drainage Calculator — Calculates the capacity of drain tile, sizes the piping needed, and calculates the pipe size.
• Prinsco Drainage Profitability Analysis — Assist in determining estimated financial benefits resulting from proper drainage.