Directory Metric or Imperial



Total Rise
Ideal Rise
Possible Rises




Restrict extreme measurements, angles etc

(or)


Direct measure dimensions in diagram Left click, release and drag to measure at full scale in top diagram

Click Stringer diagrams for angle or level.





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


Stair Calculator rise run stringer and head-room plan diagram with full dimensions

Stair Calculator - housed stringer diagram with full dimensions



Stair Calculator - notched Stringer diagram with full dimensions


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





To calculate and display upper floor opening and stair head-room, enter upper floor thickness, check the Show Head-room check-box and drag the Head slider to calculate and animate diagram head-room and floor opening.

For concrete stairs, select Concrete Thickness and enter the throat thickness (see diagram) and Stair Width to calculate formwork dimensions and concrete volume. For wooden stairs, select Stringer Width and enter the width of the stringer.
DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks

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Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.


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