How to Measure Marble Stairs and Steps?

August 20, 2026

Before having a marble staircase made, the treads, risers and stair width must be measured correctly. An incorrectly taken marble tread measurement can cause pieces not to fit the installation area, joints to look uneven and unnecessary material loss.

When measuring a staircase, you should not measure only the width and depth of a single tread. In construction work, there may be small dimensional differences between treads. For this reason, each tread and riser should be measured separately if possible, and the turns of the staircase, wall slopes, nosing allowance and cladding thickness should be taken into account.

In this guide, you can learn how to measure marble treads and risers, how to calculate stair width, how many pieces are needed and what information should be prepared before ordering.

What Are the Parts of a Staircase?

To take correct measurements, you first need to know the basic parts that make up a staircase.

Tread

It is the horizontal surface the foot steps on when using the stairs. Width and depth are taken into account in the tread measurement.

Riser

It is the vertical surface between two treads. Width and height are taken into account in the riser measurement.

Tread Nosing

It is the projection the tread stone makes toward the front of the riser. Depending on the design of the staircase, it can be made straight, beveled, rounded or profiled.

Landing

It is the flat area between flights of stairs or at floor transitions. The landing measurement should be calculated separately from the treads.

Flight of Stairs

It is the group of treads between two landings. A single staircase may have more than one flight.

Baseboard

It is the complementary piece used along the edges where the staircase meets the wall. It can be made straight, following the shape of the steps, or custom-cut.

Tools Needed to Measure Marble Treads

Before measuring, it is helpful to prepare the following tools:

Tape measure or laser distance meter
Spirit level
Square
Notebook
Pen
Labels to number each tread
Cardboard or template material for winder treads
Phone or camera

When measuring the treads, taking a photo of each piece and noting the tread number in the photo can reduce confusion during the ordering process.

How to Measure a Marble Staircase?

The following sequence can be followed when measuring a staircase:

The total number of treads on the staircase is determined.
Each tread is numbered.
The right, middle and left width of each tread is measured.
Tread depths are recorded separately.
Riser heights are measured.
The width and length of the landings are calculated.
The tread nosing allowance is determined.
The edges requiring baseboards are marked.
Templates are prepared for winder treads.
The measurements are verified with the installer and the manufacturer.

Measurements should be evaluated with the finished surface in mind. If plaster, cladding or paint will later be applied to the wall, you should check whether this will affect the measurement.

How to Measure Tread Width?

Tread width is the horizontal distance from one side of the staircase to the other. For staircases between two walls, it should not be assumed that the walls are perfectly parallel.

The following measurements should be taken for each tread:

Width at the front edge
Width at the middle section
Width at the back edge

If there is a difference between the measurements, this should be noted. Which measurement the stone will be cut to should be determined according to the installation method and the installation allowance to be left.

Cutting flush to the wall can make installation difficult in some applications. The allowance to be left due to wall irregularity and installation tolerance should be determined by the manufacturer or the installer.

Even on straight staircases, you should not assume that all treads have the same width. Especially in old buildings and on rough concrete stairs, measuring each tread separately gives a safer result.

How to Measure Tread Depth?

Tread depth is the distance between the front and back of the horizontal surface the foot steps on. The measurement is taken on the existing surface to be clad.

When calculating the final depth of the marble tread, the following elements should be considered:

Depth of the existing concrete tread
Thickness of the riser cladding
Adhesive or mortar allowance
Tread nosing projection
Wall or finishing profile
Treads appearing in alignment

Tread depth should not be measured only from the front to the back of the concrete surface and ordered directly. The nosing allowance to be left at the front and the position of the riser stone can change the final measurement.

Sample calculation:

Existing concrete tread depth: 29 cm
Designed nosing allowance: 3 cm
Final tread depth: approximately 32 cm

This example only shows the calculation method. The exact measurement should be determined according to the installation detail.

How to Measure a Riser?

For the riser measurement, the height and width of the vertical surface are measured.

Riser width is determined according to the width of the corresponding tread.

Riser height is calculated by taking into account the vertical distance between the top surface of one tread and the underside of the next tread.

The thickness of the marble cladding can affect the riser height. If stone cladding will be applied to the lower and upper treads, the distance between the finished surfaces should be calculated.

When measuring risers, the following details should be considered:

Each riser should be measured separately.
The heights on the right and left sides should be compared.
The tread stone thickness should be taken into account.
The joint or connection method should be determined.
It should be clarified whether the riser will go behind or under the tread.

It is important for safe and comfortable use that all risers appear the same height. After cladding, the first or last step should not end up at a different height from the others.

Tread, riser and tread nosing detail on a marble staircase

How to Calculate the Tread Nosing Allowance?

The tread nosing allowance is the projection the marble tread makes outward from the riser surface. This allowance affects both the design and the tread depth.

On marble treads, the nosing allowance may vary by project. In practice, projections of approximately 2 to 4 cm can be seen. However, the exact value should be determined according to the existing dimensions of the staircase, the area of use, the architectural design and the edge profile.

When choosing the nosing allowance, the following elements should be considered:

Whether the staircase is indoors or outdoors
Tread depth
Marble thickness
Edge profile
Intensity of use
Risk of slipping
How the riser is installed
Treads appearing in alignment

A tread nosing that projects too far or is left sharp can increase the risk of tripping and breakage. Any bevel, groove or rounding to be applied to the tread edge should be specified before ordering.

How to Choose Marble Tread Thickness?

Marble tread thickness should be determined according to the type of stone, the tread size, the supporting surface and the intensity of use. Thicknesses of 2 cm and 3 cm can be used for marble treads.

2 cm Marble Tread

2 cm thick marbles can be considered for indoor staircases with a suitable substructure. Being lighter can be an advantage during transport and installation. However, on long and wide treads, the structure of the stone and the support of the underlying surface should be taken into account.

3 cm Marble Tread

3 cm marble treads create a thicker edge appearance. They can be preferred for heavily used staircases, outdoor areas or projects where a more pronounced tread profile is desired.

The choice of thickness should not be based on appearance alone. The stone's vein structure, tread span, underlying surface support and installation method should be evaluated together.

You can review the tread and riser document prepared by Mermer Outlet regarding tread, riser and flooring dimensions.

How to Calculate How Many Marble Treads Are Needed?

The required number of treads is determined by counting the horizontal stepping surfaces on the staircase. The number of risers may be the same as or different from the number of treads depending on how the staircase starts and ends.

For example:

Number of horizontal treads: 15 pieces
Number of risers: 16 pieces
Number of landings: 1 piece

The order should not be placed simply as a “15-step staircase”. Tread, riser, landing and baseboard pieces should be listed separately.

A sample measurement list that can be prepared for each tread is as follows:

Piece No.	Piece Type	Width	Depth or Height	Thickness	Quantity
B01	Tread	120 cm	32 cm	3 cm	1
R01	Riser	120 cm	16 cm	2 cm	1
B02	Tread	119.5 cm	32 cm	3 cm	1
R02	Riser	119.5 cm	16.2 cm	2 cm	1
S01	Landing	120 cm	100 cm	2 cm	1

This table should be prepared anew according to the measurements of each staircase.

How to Calculate Marble Treads in m²?

Although treads can be prepared by piece, a square meter calculation can be made to see the total stone requirement.

Area of one tread:

Tread width × Tread depth

For example, a tread 120 cm wide and 32 cm deep:

1.20 m × 0.32 m = 0.384 m²

For 15 treads of the same size:

0.384 m² × 15 = 5.76 m²

Area of one riser:

Riser width × Riser height

A riser 120 cm wide and 16 cm high:

1.20 m × 0.16 m = 0.192 m²

For 16 risers of the same size:

0.192 m² × 16 = 3.072 m²

Total net area of treads and risers:

5.76 m² + 3.072 m² = 8.832 m²

This calculation does not include landings, baseboards and waste allowance. Due to custom cuts, vein direction and slab layout, the actual quantity that must be purchased may be higher than the net area.

To learn how the cost of marble is calculated, you can read the article How Are Marble Prices Calculated?.

How to Measure Winder Staircases?

For winder, fan-shaped or triangular treads, width and length measurements alone may not be enough. The angles and the front and back widths of these treads differ from each other.

The following measurements should be taken for winder treads:

Front edge length
Back edge length
Right edge depth
Left edge depth
Diagonal measurements
Inner and outer angle
Nosing allowance
Tread number

For treads with complex shapes, making a one-to-one template with cardboard, thin plywood or a suitable template material may be more accurate. The top face, the front edge and the tread number should be clearly marked on the template.

For winder staircases, it is recommended that measurements and templates be checked by a professional team. A small angle error can prevent the piece from fitting into place.

How to Measure a Landing?

Landings should be considered separately from the stair treads. If the area is square or rectangular, the net area can be calculated by measuring the width and length.

For irregular landings, the following measurements should be taken:

Front width
Back width
Right edge length
Left edge length
Diagonal measurements
Wall recesses
Column and door openings

It should be determined whether the landing will be clad in a single piece or in several pieces. Large pieces can provide a more unified look, but they may need to be divided due to transport and installation conditions.

How to Calculate Stair Baseboards?

A stair baseboard can be used to complete the joint between the wall and the tread. There are two basic installation methods:

Stepped baseboard that follows the shape of the treads and risers
Straight baseboard that follows the slope of the staircase as a single line

A stepped baseboard may require a separate horizontal and vertical piece for each step. For a straight baseboard, the sloped length of the flight of stairs should be measured.

The following information should be determined in the baseboard calculation:

Baseboard height
Total length of the flight of stairs
Whether it will be installed on the right or left wall
Whether it is needed on both sides
Piece joining method
Stone thickness
Edge surface treatment

Marble stair treads used indoors and outdoors

Choosing Marble for Indoor Staircases

For indoor staircases, appearance, cleaning, wear and the risk of slipping should be evaluated together. White, beige, gray, brown and black marbles can suit different decoration styles.

The following surfaces can be considered indoors:

Honed surface
Polished surface
Brushed surface
Tumbled surface
Surface with anti-slip grooves

Polished marble staircases can create a glossy look, but the risk of slipperiness in wet or dusty conditions should be evaluated. In heavily used building entrances and common areas, more matte surfaces or anti-slip treatments may be preferred.

You can browse stones in different colors and structures that can be used on staircases in the natural stone category.

Choosing Marble for Outdoor Staircases

Outdoor staircases may be exposed to rain, snow, frost, sun and temperature changes. For this reason, the technical properties and surface treatment of the stone should be evaluated more carefully on outdoor stairs.

The following points should be considered for outdoor staircases:

Slip resistance
Water drainage
Surface slope
Suitability of the stone for outdoor use
Freeze-thaw conditions
Suitable thickness
Tread edge treatment
Adhesive and grout suitable for outdoor use
Preparation of the surface under the stone

On outdoor stairs, instead of a polished surface, honed, brushed, tumbled, sandblasted or otherwise textured surfaces can be considered. The stone should be chosen according to the climatic conditions of the region.

For options that can be used in outdoor applications, you can browse the natural stone models.

Non-Slip Surface Options for Marble Staircases

To reduce the risk of slipping on marble staircases, the surface treatment of the stone and the tread edge should be planned together.

The methods that can be used include the following:

Honed surface
Brushed surface
Tumbled surface
Sandblasted surface
Anti-slip grooves at the front of the tread
Anti-slip tape suitable for stone
Anti-slip metal profile
Protective treatments suitable for the stone surface

Anti-slip grooves can be cut at certain intervals on the front part of the treads. The number of grooves, their depth and their distance from the tread edge should be determined before production.

Anti-slip products must not damage the marble surface and must be suitable for the area of use. Especially for adhesive tapes used outdoors, their resistance to temperature and moisture should be checked.

Which Marble Should Be Chosen for Stairs?

When choosing marble for stairs, the decision should not be based only on color and vein appearance. The marble must be suitable for the intensity of use, the tread size and the installation area.

The following properties should be evaluated during selection:

Structure and vein direction of the stone
Thickness
Tread width
Indoor or outdoor use
Surface treatment
Risk of slipping
Color and tone variations
Cleaning needs
Availability of the same stone in sufficient quantity
Visual harmony between treads, risers and landings

On wide and long treads, the vein direction of the stone can affect the cutting plan. Preparing all pieces from the same production batch can be beneficial for color and tone consistency.

You can browse the marble slabs that can be used on staircases. For marble selection and slab alternatives in large-scale projects, you can get information from Tureks’ marble slab options.

How Are Marble Tread Prices Determined?

Marble tread prices are not determined by a fixed size or only by the m² price of the stone. The following elements can affect the total cost:

Type of marble
Tread size
Marble thickness
Number of treads and risers
Landing size
Straight or winder cut
Nosing profile
Bevel and edge treatment
Anti-slip grooves
Polished or honed surface
Waste rate
Shipping
Installation labor

Winder treads and treads that require templates may require more cutting and labor than standard rectangular pieces. When comparing prices, not only the cost of the stone but also cutting and edge treatments should be considered.

For the items to be considered in a current cost calculation, you can review the marble price calculation guide.

Pre-Order Checklist

Before placing a marble staircase order, the following information should be checked:

Has the total number of treads been determined?
Have the treads been numbered individually?
Has the front, middle and back width of each tread been measured?
Have the tread depths been taken separately?
Have the riser heights been checked?
Has the nosing allowance been determined?
Have the tread and riser thicknesses been chosen?
Has the edge profile been determined?
Has it been decided whether anti-slip grooves are needed?
Have the landing measurements been taken?
Has the baseboard requirement been calculated?
Have templates been prepared for the winder pieces?
Has the vein direction of the stone been determined?
Has the waste allowance been taken into account?
Have shipping and handling conditions been planned?
Have the measurements been verified with the manufacturer and the installer?

Once natural stone pieces have been cut to a custom size, the possibility of resizing may be limited. For this reason, it is recommended that all measurements be checked a second time before production begins.

Frequently Asked Questions

How many cm should a marble tread be?

There is no single standard size for marble treads. The size should be determined according to the width of the existing staircase, the tread depth, the nosing allowance and the architectural project. Sizes such as 32 × 120 cm can be seen in practice, but each staircase should be measured separately.

How many cm thick should a marble tread be?

A thickness of 2 cm or 3 cm can be used for marble treads. The appropriate thickness should be determined according to the type of stone, the tread width, the supporting floor and the intensity of use.

How many cm should the tread nosing allowance be?

The tread nosing allowance varies by project. Applications of approximately 2 to 4 cm can be seen. The exact projection should be determined according to the tread depth, the riser position and the edge profile.

Should each stair tread be measured separately?

Yes. Especially in existing buildings, there may be small differences in the width, depth and angles of the treads. It should not be assumed that all treads are the same.

Is the number of risers the same as the number of treads?

Not always. Depending on how the staircase starts and ends, the number of risers may be one more than the number of treads or otherwise different. Both should be counted separately before ordering.

How are winder treads measured?

The front and back width, right and left depth, diagonals and angles should be measured. For complex pieces, preparing a one-to-one template can give a more accurate result.

Is a waste allowance added for a marble staircase?

Yes. A waste allowance should be considered for cutting, vein direction, the possibility of breakage and repairs that may be needed in the future. The exact rate should be determined according to the cutting plan.

Are marble treads slippery?

Polished marble surfaces can be slippery when wet or dusty. Honed, brushed or textured surfaces and anti-slip grooves can be considered.

Explore Marble Options for Your Staircase

When measuring marble treads, the tread width, depth, riser height, nosing allowance, marble thickness and landings should be evaluated together. Measuring each tread separately and preparing templates for winder pieces can help prevent production errors.

For your stair project, you can browse the marble slab options and natural stone models at Mermer Outlet. For size, stock, cutting and price information, you can contact the sales team after selecting your products.

Menü