Calculators - Estimators - Template Generators
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Total Rise

Ideal Rise
Possible Rises

Remove Color for Printing
Display scale rule to directly measure dimensions (top diagram only)
Left click, release and drag in top diagram to measure at scale

Label Diagram
Email this Calculation Creates a link (below) to save or Email current calculation

Ideal Run

Total Run (Inches)


Calculated at:

T + 2R =

Formula Help Explain Formula

Tread Thickness
Riser Thickness
Stair Width
Total Rise must be greater than Floor Thickness + Headroom to display in plan

Floor Thickness

Select 'Use Total Run' above to lock Total Run and adjust individual Runs, or 'Use Ideal Run' to adjust Total Run and Angle

Draw at stair angle Click Stringer diagrams to draw at stair angle or level
Running Stringer Points (up stringer)

Running Stringer Points (up stringer)

Min stringer throat depth Check local building regulations for minimum stringer throat depth.

Running Measurements Vertically - Lower Floor to top of each tread (Possible landing heights. Blue = middle)

Enter Total Rise of stairs, from lower floor to top of upper floor, allowing for floor coverings etc. Select Ideal Rise from drop-down. The number of rises and actual rise is calculated to fit closest to selected ideal rise.

After calculating and re-drawing stair plan diagram, a drop-down list of possible alternate rises is displayed. Select alternatives to re-calculate and display stair plan diagram. Add or subtract a single rise with the +Rise or -Rise buttons to re-calculate and re-draw stair diagram.

For concrete stairs, select Concrete Thickness and enter the throat thickness (see diagram) and Stair Width to calculate formwork dimensions and concrete volume. For wood stairs, select Stringer Width and enter the width of the stringer.

For notched stringers, mark out running measurements along stringer, then mark a framing square as shown (or attach Stair Gauges) to layout notch cut-outs. Or cut a template at the size shown and use to mark out notches along the stringer.

Cepco BoWrench Cepco Tool BW-2 BoWrench Decking Tool

The BoWrench is a tool for both professional deck builders and do-it-yourself builders. Made with heavy-gauge steel, the BoWrench gives you a fast, one-person way to straighten decking boards, which are often warped.

To operate the BoWrench, simply fit the tool on a joist, swing the lever arm, and release, pulling or pushing the boards into alignment.

When the handle is perpendicular, the tool locks in place, holding the board securely and leaving your hands free to drive in nails or screws. With the BoWrench, you'll save time, create a longer-lasting surface, and maximize your materials.

Follow Local Building Regulations Be sure to follow local building regulations regarding all stair dimensions.

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Create PDF files to print diagrams on current page. Print large images over multiple pages Printing to Scale Help and Plan Printing.

Slider Controls To fine tune Slider Controls click to select and use (cursor) keyboard keys.

Use your iPad or Android Tablet On-Site Your iPhone or Android is a valuable On-Site tool!
Lay your device on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.

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All calculators on this site are GEOMETRIC only. Check loacl regulations for sizes, spacings and all engineering requirements.

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