# Staircase Calculator

Compare risers and treads and estimate stair flight quantities.

[Open this tool](https://whatson.pk/stairs-calculator/)

Category: Construction

A straight stair flight begins with the total rise and the space available for its run.

Compare riser and tread options using measured dimensions. Review the resulting geometry before estimating flight quantities, then account for landings and structural details separately.

## Inputs and controls

* Measurement unit: Feet; Metres; Inches; Centimetres; Millimetres
* Floor to floor rise. Allowed range: 0.001 to 100000
* Target maximum riser (in). Allowed range: 0.1 to 30
* Tread depth (in). Allowed range: 0.1 to 50
* Flight width. Allowed range: 0.001 to 100000
* Waist thickness (in). Allowed range: 0 to 30
* Ordering allowance (%). Allowed range: 0 to 100. Added once to the measured requirement.
* Concrete quote (PKR / m³). Allowed range: 0 to 1000000000. Optional. Enter your own supplier quote.

## How to use

* Choose measurement unit. Enter floor to floor rise, target maximum riser, tread depth and flight width.

* Enter waist thickness, ordering allowance and concrete quote.

* Select Calculate estimate. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

Seeing rise and run together helps you notice a layout problem before turning the staircase into a material order.


## Before relying on the result

Straight flight geometry only, excluding landings. This is not a building code or structural compliance check.


## Tool limitations

Straight flight geometry only, excluding landings. This is not a building code or structural compliance check.

## Questions

### Does the result confirm building code compliance?

No. Local requirements, headroom, handrails and structural design require a separate check. This is a straight flight geometry worksheet.

### What should I check before using Staircase Calculator?

Check Measurement unit, Floor to floor rise, Target maximum riser and Tread depth. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T14:08:57+00:00

This profile describes the tool. It does not execute it or supply a professional certification.