Calculators

Quickly calculate drainage system specifications based on area size, surface material, rainfall data by zip code, and drain slope. Determine runoff amounts and get help selecting the correct drainage pipe

Design a water-efficient drip system with the NDS dripline calculator. Enter slope, soil, and pressure to get drip rate, run time, and tubing layout instantly.

Plan your EZ-Drain system with NDS’s calculator: enter project details, stormwater conditions, and site materials to determine the correct size and number of EZ-Drain systems needed.

Select rainfall intensity, area sizes, and drainage needs, then calculate runoff amounts, required trenching, and the number of EZflow Gravel-Free French Drain Systems needed to manage stormwater efficiently.

Use the Flo-Well Calculator with the Rational Method to plan dry wells and calculate gravel volume based on runoff area, rainfall intensity, and soil depth.

Important information on the load-bearing capacity of NDS stormwater management systems.  Helps engineers and contractors assess the strength and durability requirements for a wide range of product needs.