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Staircase and stair calculator


Drawing Scale:




Enter dimensions in mm:

Staircase height Y, mm
Staircase length X, mm
Steps amount C
Steps thickness Z, mm
Steps overhang F, mm
Stair stringer width (minimum) H, mm
First step on 2nd floor level SP1
First step below 2nd floor level SP2


If you think about the construction of a stairway, which is usually an essential part in houses with two and more stores, you may face the challenge how to do the calculations needed for the drawings, draw a layout and calculate the amount of the materials required.  The present free online staircase calculator knows how to compute:

  • handrail;
  • construction size measurement;
  • steps, rise and run for stairs;
  • dimensions;
  • stair stringer;
  • height and width;
  • tread and riser.

The parameters asked should be entered in mm or items where it is applicable.

The basic parameter to measure how the entryway is convenient is the calculation done by the formula  based on a human step size. In general, the step size ranges from 60 to 66 cm, therefore an average value is 63 cm.  The formula defining the level of convenience is as follows: depth of a tread + 2 heights of a tread = 63±3 cm. The optimal rise is from 30° to 40°. The optimal height of treads is 20 -25 cm. Estimation of stairway treads depends on the height between storeys and height of treads. The treads depth should be not less than 28-30 cm.

The program provides the drawings including all basic dimensions and corners, dimensions of treads, layout of stringers in relation to the corner of a tread. You also have an option to print the drawings.

How to build a staircase yourself?

First, every stairway comprises of three important and necessary elements like stringers, treads and risers. Before you begin with the project, you have to specify the space where to install it keeping in mind the rise height and shape of it. Depending on the space available, you may think about possible type and materials to be chosen. The stairway design can be very basic, but it will still fit well to your house style.  It can become an essential decorative element in your home depending on the décor of railing  and balusters, or you may use unusual materials or shapes for treads. The last trends are metal and wood steps setting against the traditional carpet and stones. Metal can be not so safe if you have small kids. The same statement could be said if you plan an open railing. At the same time wood is not so resistant to scratches and wear. You can order curve-shaped balusters and railing with some ornament at a woodworker or blacksmith, or you may buy those you like at the nearest construction store. Creation of handmade balusters or railing is long, time-consuming and complicate process.

However, while thinking about decoration, do not forget about the function of a stairway. Regardless what material you prefer to stay with, the wooden or metal stair calculator which estimates typical construction for US will  greatly serve  you.

The flight of steps has no tight relation with specific figures, and the number of flights depends only on the space available. The smallest width of the flight of steps equals 80 cm. When the figure is smaller, you may run into a problem every time when you have to move furniture upstairs or downstairs. The best width is 100-140 cm.

By our stair calculator, you are able to perform an accurate estimation of metal or wooden stairway and compute the amount of construction materials needed to install it.

One of the most important elements in your stairway is stringers. They are intended to carry the weight of the household traffic. The recommended amount of it is 2. When the loads are increased, the number of the latter installed also should be increased. Each next stringer is to be produced to a template of the first.  The most difficult part of estimation is done by the stair stringer calculator. It is almost impossible to do manually. When installing, you have to check the level of the stringers from both sides, otherwise steps might have some slope.

After your stairway is installed, it can require coloring, lacquering or another finish coating. In addition, the lacquer ensures a protective layer for the product. If you would like to save the wood structure, then you must apply a transparent lacquer.

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