How to Use the EZ Stair Calculator

Enter Total Stair Rise* inches  
Enter Your Run inches We suggest 10.5" for 2x12 or 2 - 2x6 Treads. Treads may be cut to suit other widths.
Either B or C is required.    
Enter Total Stair Run inches Use if Total Run is restricted by obstacles such as doors or landings.
 Is there a Head Height Restriction? Yes    No  
Enter Head Height Restriction (if applicable) inches
Minimum Head Height clearance is 78 inches. This may alter B or C above.

Note: For commercial stairs, I.B.C. code requires a maximum RISE of 7" and minimum RUN of 11".

  *Denotes required field.


  Result 1 Customize Adjust
Number of RISERS Up   Down (Click to Adjust)
RISE Height inches
Number of RUNS Number of Bracket Sets Needed
RUN (inches)
Longer  Shorter (Click to Adjust)
Total Stair RUN inches
Stringer Length feet
EZ Stair Spacer Setting Adjust spacer length to set brackets

Cut Treads

Enter TREAD Thickness* inches
Enter RISER Thickness* inches

Bottom Cuts

Will the stair be set on finished surface or sub-surface ?* Click to select.

Enter finished surface thickness: inches*

The front cut is nominal 2-inch from flange. Add or subtract as required to meet base board heights, etc.   2 " inches

Top Cuts

Will the top rise have a finished riser facing or set flush ?* Click to select.

Enter Riser Facing Thickness: inches*

The top stringer may be cut horizontally (C) to match the top surface or base board height, etc.

* Denotes required field.

Stringer Cuts

# inches # inches # inches    
Note: All cuts are measured from the bracket flanges and are cut parallel to the flanges.

Stringer Measurements

Enter STRINGER Thickness inches*
Enter overall width of stair including stringers inches*
Note: Allow for sheetrock thickness on interior stairs if stringer is blocked out over sheetrock

* Denotes required field.

Materials List

Does your tread have a nose? YES   NO

Will stairs be INTERIOR or EXTERIOR ?

Will each step have one SINGLE TREAD or TWO HALF TREAD ?
Item Size Quantity
Bracket Sets    
Bottom Riser 1 
Top Riser Facing
Stringers 4
Cleat Brackets, see details for correct usage

Fasteners Needed

    Screw Type Quantity
Bracket Stringer
  Single Tread 2 1/2" #8 Deck Screws
When using pressure treated lumber use screws approved for use with ACQ or use stainless steel screws.
  Two Half Treads 2 1/2" #8 Deck Screws
When using pressure treated lumber use screws approved for use with ACQ or use stainless steel screws.
  Carpeted 2 1/2" #8 Deck Screws
  Finished Wood 2 1/2" #8 Deck Screws
    2 1/2" - 8d Finish Nails
NOTE: For 3rd Alternative: Subtract additional finished tread thickness for bottom cut (Step 4 (C)). Click above images for enlarged view.
For more information on cleat installation, click here to view a detailed PDF. Click on above images to enlarge view.
Click on above images to enlarge view.

Note: Customer must decide method screw type and quantity for rise and tread attachment.

Disclaimer: All specifications noted in this calculator are approximate. Use at your own discretion.

Copyright © 2018 EZ Stairs, Inc., all rights reserved.