मुफ़्त छत कैलकुलेटर
ज़मीनी क्षेत्रफल और ढलान से छत के वर्ग, शिंगल बंडल और वास्तविक छत क्षेत्र का अनुमान लगाएँ। मुफ़्त, तेज़ और पूरी तरह आपके ब्राउज़र में, बिना साइन-अप के।
अपडेट किया गया
Roofing material
Extra material for cuts, spillage and breakage.
Roofing needed
14.76
squares
- Actual roof area
- 1,476ft²
- Building footprint
- 1,200ft²
- Shingle bundles3 bundles per square
- 45bundles
- Pitch multiplier applied
- 1.1180×
How this is calculated
roof area = footprint × √(1 + (rise ÷ 12)²); squares = area ÷ 100; bundles = squares × 3
- The pitch multiplier is the true slope factor: a 6/12 roof is 1.118× its footprint, a 12/12 roof 1.414×.
- One "square" is 100 ft² of roof; standard 3-tab shingles come 3 bundles to the square.
- Footprint is treated as a simple rectangle — add each section separately for an L-shaped or complex roof.
- Hips, valleys and ridge cap are not itemised; the waste allowance is where they are absorbed.
अक्सर पूछे जाने वाले प्रश्न
How does the Roofing Calculator work?
It applies the formula roof area = footprint × √(1 + (rise ÷ 12)²); squares = area ÷ 100; bundles = squares × 3. Enter your measurements and the result updates instantly in your browser — nothing is uploaded and no sign-up is needed.
Why should I include a waste allowance?
Offcuts, spillage, breakage and an uneven sub-base all consume material that the raw geometry does not account for. The default allowance is deliberately modest; increase it for complex layouts, and remember that running short usually costs more in a second delivery than the surplus did.
Are the results exact?
They are a close estimate, not a guarantee. The pitch multiplier is the true slope factor: a 6/12 roof is 1.118× its footprint, a 12/12 roof 1.414×. Real materials vary by supplier, moisture content and compaction, so confirm the rate with your supplier before placing a large order.
Is this tool free?
Yes, completely free with no registration. All calculations happen client-side in your browser.
Does it work on mobile?
Yes. The calculator is fully responsive and works on phones and tablets in any modern browser — useful when you are measuring on site.
संबंधित टूल
मुफ़्त डामर कैलकुलेटर
क्षेत्रफल और संघनित मोटाई से ड्राइववे या प्लॉट के लिए डामर का टनभार निकालें। मुफ़्त, तेज़ और पूरी तरह आपके ब्राउज़र में, बिना साइन-अप के।
मुफ़्त ड्राईवॉल कैलकुलेटर
कमरे की परिधि और दीवार की ऊँचाई से ड्राईवॉल शीट, स्क्रू और जॉइंट कंपाउंड का अनुमान लगाएँ। मुफ़्त, तेज़ और पूरी तरह आपके ब्राउज़र में, बिना साइन-अप के।
मुफ़्त ऑनलाइन आयु कैलकुलेटर
राशि चिह्नों के साथ अपनी सटीक आयु वर्षों, महीनों और दिनों में गणना करें। मुफ़्त, तेज़ और पूरी तरह आपके ब्राउज़र में काम करता है, बिना साइन-अप के।
मुफ़्त प्रतिशत कैलकुलेटर
कई गणना विधियों के साथ आसानी से प्रतिशत की गणना करें। मुफ़्त, तेज़ और पूरी तरह आपके ब्राउज़र में काम करता है, बिना साइन-अप के।
About the Roofing Calculator
The Roofing Calculator converts a building footprint and roof pitch into the true sloped roof area, then into roofing squares and shingle bundles. Enter your measurements and the result updates as you type — there is nothing to submit and nothing to wait for.
Everything runs in your browser. Nothing you enter is sent to a server, there is no sign-up, and there is no usage limit.
Who it's for
Homeowners pricing a re-roof and contractors checking a supplier quote.
How the calculation works
roof area = footprint × √(1 + (rise ÷ 12)²); squares = area ÷ 100; bundles = squares × 3
The result depends on a few standard constants, which are stated on the page rather than hidden:
- The pitch multiplier is the true slope factor: a 6/12 roof is 1.118× its footprint, a 12/12 roof 1.414×.
- One "square" is 100 ft² of roof; standard 3-tab shingles come 3 bundles to the square.
- Footprint is treated as a simple rectangle — add each section separately for an L-shaped or complex roof.
- Hips, valleys and ridge cap are not itemised; the waste allowance is where they are absorbed.
Getting an accurate estimate
Measure twice. Small errors in a linear dimension compound, because material volume scales with two or three of them at once — a 6-inch error across a 20-foot run is over a cubic foot of material on a 4-inch pour.
Keep the waste allowance. The default is deliberately conservative: offcuts, spillage, uneven sub-base and breakage are all real, and running short mid-job usually costs more in a second delivery than the surplus did.
Round up when you order. Suppliers sell in fixed increments — quarter yards, whole bags, full boxes — so treat the figure here as the minimum you need rather than the exact amount to buy.