Calculate pre-painted galvanized (PPGI) and pre-painted galvalume (PPGL) roofing sheet weight per m², per sheet and total project tonnes — as per IS 14246 standard used across India.
Select product type, enter base thickness, coating grade, profile, and sheet dimensions — weight results update instantly.
Get accurate roofing sheet weight in seconds — for procurement, BOQ, and structural loading
Choose PPGI for pre-painted galvanized (zinc-coated) sheets — the most common type in India. Choose PPGL for pre-painted galvalume (aluminum-zinc coated) — preferred for coastal and aggressive environments.
Select or enter the Base Metal Thickness (BMT) — not the Total Coated Thickness (TCT). BMT is the actual steel thickness before coating. Common values in India: 0.40mm, 0.47mm (24G), 0.50mm. Always check your BIS certified MTC for the actual BMT.
Select the zinc (Z-grade) or Al-Zn (AZ-grade) coating. For standard industrial roofing in India, Z120 is common. For coastal or industrial chemical environments, use Z275 or AZ150+. The coating weight adds directly to total sheet weight.
Corrugated and profiled sheets have more actual steel area per m² of coverage due to the profile shape. Select your profile — the calculator applies the correct development factor to give accurate weight per coverage m².
Enter the coverage (effective) width — not the nominal/total sheet width. Coverage width = nominal width minus the overlap on each side. Enter sheet length in metres. Common lengths: 3 m, 6 m, 9 m, 12 m.
Enter the number of sheets. Results show: kg/m², weight per sheet, total kg, total tonnes (MT), total coverage area, and sheets per tonne — all the data needed for a complete procurement order or structural dead load calculation.
How base steel, coating, paint, and profile factor combine to give total sheet weight
Many suppliers quote Total Coated Thickness (TCT), which includes the zinc coating layer. TCT = BMT + ~0.04mm to 0.08mm. Always request the BMT from your supplier's MTC. Using TCT instead of BMT in this calculator will overestimate weight by 8–15% on thin sheets like 0.35mm.
A corrugated sheet covers 1000mm width but uses more steel due to the wave shape. A 1006 corrugation profile (76mm pitch, 19mm depth) has a development factor of ~1.14 — meaning 1 m² of coverage area requires 1.14 m² of actual steel. This factor applies to base steel, coating, and paint weight together.
A sheet with nominal width 1160mm may have a coverage width of only 1000mm after allowing for side laps (typically 1–1.5 corrugation overlap on each side). Always base your area estimate on the coverage width, not the sheet-off-coil width stamped on the bundle.
Coating grade (e.g. Z120) represents total zinc on both sides in g/m² of sheet area. Z120 = 0.120 kg/m² added weight. For PPGL, the AZ coating is an aluminum-zinc alloy (55% Al, 43.4% Zn, 1.6% Si) — slightly lower density than pure zinc, but the manufacturer specifies the total coating mass in g/m², so the same addition method applies.
Standard weight reference for flat (plain) sheets — multiply by profile factor for corrugated/profiled roofing
| BMT (mm) | Coating Grade | Base (kg/m²) | Coat (kg/m²) | Total Flat (kg/m²) | Corrugated 1006 (kg/m²) | 6m × 1m Sheet (flat, kg) |
|---|---|---|---|---|---|---|
| 0.30 mm | Z100 | 2.355 | 0.100 | 2.485 | 2.833 | 14.91 |
| 0.30 mm | Z120 | 2.355 | 0.120 | 2.505 | 2.855 | 15.03 |
| 0.35 mm | Z100 | 2.748 | 0.100 | 2.878 | 3.281 | 17.27 |
| 0.35 mm | Z120 | 2.748 | 0.120 | 2.898 | 3.304 | 17.39 |
| 0.40 mm | Z120 | 3.140 | 0.120 | 3.290 | 3.751 | 19.74 |
| 0.40 mm | Z180 | 3.140 | 0.180 | 3.350 | 3.819 | 20.10 |
| 0.45 mm | Z120 | 3.533 | 0.120 | 3.683 | 4.199 | 22.10 |
| 0.45 mm | Z180 | 3.533 | 0.180 | 3.743 | 4.267 | 22.46 |
| 0.47 mm | Z120 | 3.690 | 0.120 | 3.840 | 4.378 | 23.04 |
| 0.47 mm | Z180 | 3.690 | 0.180 | 3.900 | 4.446 | 23.40 |
| 0.50 mm | Z120 | 3.925 | 0.120 | 4.075 | 4.646 | 24.45 |
| 0.50 mm | Z180 | 3.925 | 0.180 | 4.135 | 4.714 | 24.81 |
| 0.50 mm | Z275 | 3.925 | 0.275 | 4.230 | 4.822 | 25.38 |
| 0.55 mm | Z180 | 4.318 | 0.180 | 4.528 | 5.162 | 27.17 |
| 0.55 mm | Z275 | 4.318 | 0.275 | 4.623 | 5.270 | 27.74 |
| 0.60 mm | Z180 | 4.710 | 0.180 | 4.920 | 5.609 | 29.52 |
| 0.60 mm | Z275 | 4.710 | 0.275 | 5.015 | 5.717 | 30.09 |
| 0.70 mm | Z275 | 5.495 | 0.275 | 5.800 | 6.612 | 34.80 |
| 0.80 mm | Z275 | 6.280 | 0.275 | 6.585 | 7.507 | 39.51 |
* All values include 30 g/m² paint system (top + back coat). Flat = plain sheet, no profile factor. Corrugated 1006 applies development factor 1.140 to coverage area. BMT = Base Metal Thickness as per IS 14246:1995. Actual values may vary by ±5% depending on manufacturer tolerances.
Zinc and Al-Zn coating grades — their weight contribution and recommended applications in India
Coating grades per IS 14246:1995 (PPGI) and IS 15961 (PPGL/Galvalume). Zinc density ≈ 7.13 g/cm³ | Al-Zn alloy density ≈ 3.8 g/cm³. Grades specify total coating weight on both sides combined.
Key sectors driving roofing sheet demand across India's construction boom in 2026
Pre-Engineered Buildings across India's industrial corridors — Pune, Ahmedabad, Ludhiana, Chennai — use PPGI/PPGL corrugated and trapezoidal sheets as the primary roofing and side-cladding material. Accurate weight per m² is essential for purlin design and dead load calculations.
Under PM-Surya Ghar Muft Bijli Yojana 2026, millions of rooftops are being retrofitted with solar panels. Structural engineers need the exact dead load of existing PPGI/PPGL roofing before approving panel mounting systems. PPGL AZ150 is the preferred sheet for new solar-ready roofs.
Logistics parks, e-commerce fulfilment centres, and cold chain warehouses under PM Gati Shakti and WDFC corridors require PPGI Z180 or PPGL AZ150 roofing for its corrosion resistance in high-humidity conditioned environments.
Pradhan Mantri Awas Yojana (PMAY) rural housing units across states like Odisha, MP, and UP use 0.35mm and 0.40mm PPGI sheets as the primary roofing element. Government tender BOQs require precise weight-per-sheet for material supply contracts.
Poultry sheds, cattle shelters, grain storage godowns, and agro-processing facilities across rural India use lightweight 0.40–0.47mm PPGI corrugated sheets. Total weight determines transport vehicle load per delivery from steel stockists.
Steel distributors, civil contractors, and government procurement agencies calculate total tonnes from sheet weight to raise purchase orders, estimate logistics costs, and verify delivery weights at gate. Sheets per tonne is a key metric used at every major stockist in India.
Practical guidance for engineers, contractors, and procurement teams across India
The single most common mistake in roofing sheet weight calculation in India. BMT (Base Metal Thickness) is the actual steel. TCT (Total Coated Thickness) includes the zinc layer, which adds 0.04–0.10mm depending on the coating grade. For a 0.47mm BMT sheet with Z120 coating, TCT ≈ 0.50mm. Using TCT overestimates base steel weight by ~6–8%. Always demand the BIS-certified MTC showing the BMT explicitly.
A "1160mm sheet" typically has only 1000mm effective coverage after deducting side laps. On a 30m × 20m = 600m² roof, using nominal width instead of coverage width would underestimate the sheet count by ~14%, creating material shortfall on site. Always confirm coverage width from the manufacturer's profile drawing before calculating quantities.
For structural purlin design, the roofing system dead load includes: PPGI/PPGL sheet weight + fasteners (~0.05 kg/m²) + insulation (if any, 1.5–4 kg/m² for glass wool) + any roof access equipment loads. Use this calculator for sheet weight, then add the other components for the total dead load input to your IS 875 Part 1 load combination.
The "Sheets per Tonne" result from this calculator tells you how many sheets fit on one truck load. A standard Indian 10-tonne truck carries about 380–430 sheets of 0.47mm × 6m PPGI. Use this figure to plan delivery schedules and avoid on-site delays. Overloading is a common cause of delayed unloading at remote project sites.
PPGL (Galvalume) sheets have significantly better heat reflectance than PPGI — surface temperatures can be 10–15°C lower under identical conditions. For buildings in Rajasthan, Gujarat, and Telangana where roof temperatures exceed 65°C in summer, PPGL substantially reduces air-conditioning loads. The slight weight difference (AZ vs Z coating) is negligible compared to the energy savings.
In India, many secondary market PPGI sheets are sold without valid BIS certification. Uncertified sheets may have under-weight zinc coatings (Z80 sold as Z120) or below-spec BMT. For government projects, BIS IS 14246 certification on the bundle label is mandatory. Ask for the BIS licence number and verify on the BIS portal before accepting delivery.
More structural and material weight calculators on SheetGauge
Common questions about PPGI PPGL roofing sheet weight and specifications in India