NDS Calculators & Tools | Plan Drainage & Irrigation Systems

By NORMA Group

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Calculators

Please use the links below to access our tools and calculators.

Drainage Calculator

NDS Drainage Calculator

Drainage Calculator

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

FloWell Calculator

NDS Flo-Well Calculator

Flo-Well Calculator

Use the NDS Flo-Well Calculator to size dry wells, calculate runoff volume, and estimate gravel backfill for drainage systems fast.

EZflow Calculator

NDS EZflow Calculator

EZflow Calculator

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.

Dripline Calculator

NDS Dripline Calculator

Dripline Calculator

Quickly calculate the optimal placement and spacing for water-efficient dripline irrigation systems. Enter soil type, plantings, slope and water pressure and get tubing length, spacing, flow and run times in a flash.

EZ-Drain Calculator

NDS EZ-Drain Calculator

EZ-Drain Calculator

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.

Load Ratings

Load Ratings

Load Ratings

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.

NDS StormChamber® System Calculators

Click below to download and open with Excel.

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NDS StormChamber Cost Comparison Worksheet

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | 13 KB

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NDS StormChamber® Systems Design Calculator

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | 513 KB

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NDS StormChamber Staged Storage Calculator

application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | 171 KB