Roof Area Calculator
Calculate measured roof-section area. For slopes, measure the surface or apply a separate pitch calculation before ordering materials.
Präzisionsrechner
Roof Area Calculator
Roof Area Calculator: Calculate a roof section area from measured dimensions. For pitched roofs, measure the actual roof surface or
Bekanntes Gebiet
Raumabmessungen
Mehrere Räume
Raum (Fuß + Zoll)
ft
in
ft
in
Rechteck (Fuß + Zoll)
ft
in
ft
in
Wand- und Fensterabmessungen
Abmessungen der Kathedralenmauer
Square Dimensions
Rectangle Dimensions
Rechteckiger Rand
Circle Dimensions
Circle Border (Annulus)
Annulus Dimensions
Triangle (3 Sides)
Triangle (Base & Height)
Trapez
Regelmäßiges Polygon
Fläche + Tiefe (Volumen)
MaterialabfallfaktorOPTIONAL
%
Schätzen Sie die MaterialkostenOPTIONAL
Calculation Results
Entdecken Sie unsere Quadratmeterrechner
Wählen Sie einen speziellen Rechner für Ihr genaues Projekt – Räume, Formen, Materialien, Außenbereiche und Einheitenumrechnungen.
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Wie es funktioniert
1
Wählen Sie Form
Choose the shape that matches your space.
2
Geben Sie die Abmessungen ein
Geben Sie Messungen in einer beliebigen Einheit ein. Fügen Sie Menge, Abfallfaktor und Materialpreis hinzu.
3
Erhalten Sie Ergebnisse
Sehen Sie sich die Fläche in ft², in², yd², m², Acres plus Kostenvoranschlag an – alles auf einmal.
Häufig gestellte Fragen
How do I calculate the square footage of a roof?
On a simple gable roof, measure base length and width, then multiply by a slope factor: 1.054 for 4/12 pitch, 1.118 for 6/12, 1.202 for 8/12. Or measure the roof surface directly if you can reach it safely.
What is a "roofing square" and how does it relate to square feet?
One roofing square is 100 sq ft. Shingles and underlayment are sold by the square. Divide roof area by 100 for squares needed. Add 10 to 15% for ridges, valleys, and cuts.
How do I measure roof area from the ground?
Measure the building footprint (length × width) and multiply by a pitch factor for your slope. Satellite tools and roof measurement apps help too. Complex roofs with dormers need each section measured separately.
What waste factor should I use for roofing?
Use 10% for simple gable roofs. Use 15% for hip roofs, dormers, or valleys. Use 15 to 20% for complex roofs with skylights and penetrations. Steep roofs waste more because cuts are harder.
How do I calculate ceiling area vs. roof area?
Ceiling area is flat: room length × width below. Roof area includes slope, so it is larger. A vaulted or cathedral ceiling matches roof area for that section. Flat ceilings match floor area.