Grade Ring Calculator

Input Mode

Choose how you want to specify the height requirement

Simple Measurement Rim to Structure

Cast Iron Frame/Cover Height

Height of cast iron frame and cover in inches.

Field Adjustment

Field adjustment (e.g., 1").

Both values will be subtracted from total height before calculating grade rings.

Select which ring sizes to include in calculations

12" Rings 6" Rings 5" Rings 4" Rings 3" Rings 2" Rings

Enter structure details and height requirement

Structure Name

Height

Input Format

Enter structure details and elevation measurements

Structure Name

Rim Elevation

Structure Elevation

Manage your ring configurations

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