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Verifizierter Rechner mit transparenter Formel
Concrete Porch Calculator.
Estimates the volume of concrete needed for a rectangular porch slab in cubic yards.
Ihre Eingaben
So funktioniert es
- 1
Measure the length and width of the porch in feet.
- 2
Measure the thickness in inches.
- 3
Multiply length by width by thickness (converted to feet).
- 4
Divide by 27 to get cubic yards.
round((length * width * (thickness / 12)) / 27 * 100) / 100Häufig gestellte Fragen
How do I convert inches to feet?
Divide the thickness in inches by 12 to get feet.
Why divide by 27?
There are 27 cubic feet in one cubic yard.
Should I order extra concrete?
It's common to order 10% extra to account for spillage and uneven subgrade.
Diese Rechner-Kategorie erkunden
Ergebnisse
Formel geprüftConcrete Volume
0,99cu yd
Schätzung nur zur allgemeinen Orientierung – wichtige Entscheidungen mit einem geeigneten Fachmann verifizieren.
So funktioniert es
Estimates the volume of concrete needed for a rectangular porch slab in cubic yards.
- Measure the length and width of the porch in feet.
- Measure the thickness in inches.
- Multiply length by width by thickness (converted to feet).
- Divide by 27 to get cubic yards.
Formeln
Die Mathematik hinter diesem Rechner, aufgeschrieben, damit Sie das Ergebnis überprüfen können.
Volume in cubic yards
L and W are in feet, T is in inches. Dividing by 324 converts cubic inches to cubic yards.
Example:
Input: L=10 ft, W=8 ft, T=4 in
Calculation: (10 × 8 × 4) / 324 = 320 / 324
Result: ≈ 0.99 cu yd
Anwendungsfälle im Alltag
Wo diese Berechnung im täglichen Leben vorkommt.
Planning a new porch
Estimate concrete needed before ordering from a ready-mix supplier.
Example: A 10x8 ft porch with 4-inch slab.
Budgeting materials
Calculate cost by multiplying volume by local concrete price per cubic yard.
Example: 0.99 cu yd × $150/cu yd ≈ $148.50
Comparing slab thickness
See how changing thickness affects concrete volume and cost.
Example: Increasing from 4 to 6 inches adds about 0.5 cu yd for a 10x8 slab.
Tipps und häufige Fehler
Tips
- Measure to the nearest 0.1 foot for accuracy.
- Add 10% extra for waste and uneven ground.
- Check local building codes for minimum thickness.
- Use a concrete calculator for irregular shapes separately.
Common Mistakes to Avoid
- Forgetting to convert thickness from inches to feet.
- Using square feet instead of cubic feet.
- Not accounting for waste or over-excavation.
Annahmen und Einschränkungen
- Use the stated inputs and units.
- Results are estimates for planning and education.
- Check measurements and source data before making an important decision.