מחשבון מדרגות בטון

חשב נפח בטון, מידות מדרגות ועובי משטח תחתון. הדמיה תלת-ממדית והערכת עלויות.

הגדרות
mm
מידות
mm
mm
mm
mm
mm
חומרים ועלויות
$
נפח בטון
0
שטח רצפה
0
מספר מדרגות
0
גובה מדרגה בפועל
0.0mm
עלות משוערת
$0.00
Saved stair estimates stay in this browser only.
הדמיה
Saved on this device
No data
No saved stair estimates yet.

מדריך ומידע

Use this calculator for a straight concrete stair flight. It estimates the stair shape and concrete volume, but it does not replace local code checks or structural design.

איך להשתמש בכלי

  1. מדוד את 'הגובה הכולל' מהרצפה התחתונה לרצפה העליונה (גמר).
  2. הזן את גובה הרום (Rise) ועומק השלח (Run) הרצויים.
  3. הגדר את 'עובי המשטח' – זהו עובי הבטון הקונסטרוקטיבי מתחת למדרגות.
  4. המחשבון יקבע את מספר המדרגות המדויק ואת הבטון הנדרש.

What the estimate includes

The tool estimates a straight stair as step triangles plus the sloped waist slab. Landings, beams, side walls, reinforcement, formwork, and waste are not included.

Step count
Total rise divided by target rise, rounded to a whole step count.
Exact rise
Total rise divided by the rounded step count.
Concrete volume
Triangular step area plus sloped waist slab area, multiplied by stair width.
Cost
Estimated concrete volume multiplied by your price per volume.

Practical examples

House stair check

Try a 2800 mm rise, 175 mm target rise, 250 mm tread, 1000 mm width, and 150 mm waist thickness to estimate a compact residential-style flight.

Compare a deeper tread

Increase the tread depth and save the calculation. The concrete volume and floor run will grow, but the stair may feel less steep.

Budget a wider stair

Change only the stair width to see how volume and cost scale for a wider flight.

Common mistakes

Measuring unfinished floors

Use finished floor levels when you know them. Floor finishes can change the real rise and make the first or last step uneven.

Treating the warning as approval

The warnings are quick checks only. Stair rules differ by country, building type, and local authority.

Forgetting landings and waste

The estimate is for the straight flight only. Add landings, edge beams, waste, and delivery minimums outside this tool.

Guessing waist thickness

Waist thickness affects volume and structure. Use the value from your drawing or ask an engineer for structural work.

Tips

Save each option

Save a few rise and run options so you can compare comfort, footprint, concrete volume, and cost.

Check the angle early

A steep angle can save space but may be uncomfortable or fail local rules. Adjust rise and run before pricing material.

Order with a margin

Concrete estimates are based on clean dimensions. Real pours often need extra for uneven ground, form losses, and ordering rules.