AAC Block Sizes, Price List & Complete Buying Guide 2026
— By Maruti Hydraulics Limited
Comprehensive guide covering standard AAC block sizes, price ranges per piece and per cubic meter, and factor affecting prices.
AAC (Autoclaved Aerated Concrete) blocks are manufactured in standardised dimensions per IS 2185 Part 3, with dimensions varying by application — external envelope walls, internal partition walls, compound walls, or lintel coursing. Understanding which sizes to specify, what prices to expect in 2026, and how to calculate project quantities accurately prevents the two most common construction procurement mistakes: over-ordering (blocking capital in excess inventory) and under-ordering (site delays waiting for resupply).
This guide covers standard AAC block sizes available in the Indian market, 2026 price ranges by region and grade, the key factors that affect landed cost at your construction site, and how to estimate project quantities accurately.
How AAC Blocks Are Dimensioned
AAC block dimensions follow the modular coordination principle of IS 2185 Part 3. The standard face dimension (length × height) is 600 mm × 200 mm for the vast majority of Indian production. Width (thickness) varies from 75 mm to 300 mm depending on application. This face dimension means that one AAC block in a standard 600 × 200 mm face covers 0.12 m² of wall face area — simplifying quantity calculations.
Block dimensions in the plant are determined by the wire cutting machine setup. The green AAC cake (typically 6.2 m × 1.5 m × 0.65 m) is cut by horizontal and vertical wires into blocks of the required size. Width is determined by the vertical wire spacing, which can be adjusted to produce different widths without major machine changeover — allowing a single plant to produce multiple width variants in the same production shift.
Standard AAC Block Sizes Available in India
600 × 200 × 75 mm (4-inch equivalent): The thinnest standard AAC block. Used for internal partition walls where space efficiency is at a premium — residential apartment dividing walls, bathroom/toilet enclosures, and demountable partition systems. Not suitable for external walls in most Indian climatic zones without additional thermal treatment. Weight approximately 6.5–8.5 kg per block at D550 density. Laying speed: approximately 0.5 m²/man-hour faster than 100 mm blocks due to lighter handling.
600 × 200 × 100 mm (4.5-inch equivalent): The highest-volume block size in India, accounting for approximately 40–45% of total AAC block production by CBM. Suitable for both internal partition walls and external walls in residential buildings (with appropriate external render or cladding for weatherproofing). Structural thermal performance meets NBC 2016 requirements for hot-dry and composite climate zones. Weight approximately 8.5–11.5 kg per block at D550 density.
600 × 200 × 125 mm (5-inch equivalent): A transitional size used for external walls in commercial buildings and residences in humid or coastal climatic zones where additional moisture resistance and minor thermal mass is required. Less commonly stocked by all plants — check availability from your preferred supplier before specifying.
600 × 200 × 150 mm (6-inch equivalent): The standard external wall size for residential villas, independent houses, and commercial buildings in India. Provides better thermal mass, improved sound transmission loss (STC approximately 42–45 dB for a single-leaf 150 mm AAC wall), and superior structural stability at ground level and for longer unsupported wall panels. Weight approximately 13–17 kg per block at D550 density.
600 × 200 × 200 mm (8-inch equivalent): Used for compound walls, boundary walls, basement retaining walls (below-grade applications require additional waterproofing treatment), and walls requiring maximum thermal insulation. Also specified for industrial buildings where the wall contributes to the structural system. Weight approximately 17–22 kg per block at D550 density — at the practical single-person manual handling limit; two-person or mechanical laying is standard above this size.
600 × 200 × 225 mm and 600 × 200 × 250 mm: Less common sizes used for specialty applications — industrial cold rooms (in combination with insulation board), very high walls (above 4 m unsupported), and specific structural engineering requirements where wall thickness is specified for load-bearing or seismic performance. May require lead time for production scheduling at some plants — confirm availability with 3–4 weeks notice.
AAC Block Price Range in India (2026)
AAC block prices in India vary by region, brand tier, density grade, order volume, and delivery distance. The following indicative ranges are for standard D550 grade (IS 2185 Grade 2) blocks at plant gate or local dealer level in 2026. Add ₹200–₹800/CBM for delivery depending on distance.
75 mm AAC block:
Regional manufacturer (plant gate): ₹27–₹40 per block | ₹2,250–₹3,300/CBM
National brand (delivered, 50 km): ₹38–₹55 per block | ₹3,150–₹4,600/CBM
100 mm AAC block:
Regional manufacturer (plant gate): ₹35–₹50 per block | ₹2,900–₹4,200/CBM
National brand (delivered, 50 km): ₹48–₹65 per block | ₹4,000–₹5,400/CBM
150 mm AAC block:
Regional manufacturer (plant gate): ₹50–₹72 per block | ₹2,800–₹4,000/CBM
National brand (delivered, 50 km): ₹68–₹92 per block | ₹3,800–₹5,100/CBM
200 mm AAC block:
Regional manufacturer (plant gate): ₹65–₹95 per block | ₹2,700–₹3,950/CBM
National brand (delivered, 50 km): ₹88–₹120 per block | ₹3,650–₹5,000/CBM
Note: Prices per CBM tend to decrease slightly with increasing block thickness because the block surface area (and hence cutting wire length) per CBM decreases for thicker blocks, reducing production cost. This is why 200 mm blocks are often slightly cheaper per CBM than 100 mm blocks from the same plant.
Regional Price Variation Across India
AAC block prices vary significantly across India's states, primarily driven by raw material costs (lime, cement, and fly ash freight distances), energy costs (coal and electricity rates differ substantially between states), and local competition intensity. Indicative 2026 regional price levels for 100 mm IS 2185 Grade 2 blocks:
Maharashtra (Mumbai, Pune, Nashik): ₹4,200–₹5,500/CBM delivered — highest prices, reflecting high land and labour costs but also highest demand and contractor willingness to pay for documented quality.
Gujarat (Ahmedabad, Surat, Vadodara): ₹3,800–₹5,000/CBM — competitive market with multiple established manufacturers; price discipline maintained by IS certification requirements from large developers.
Rajasthan (Jaipur, Jodhpur, Kota): ₹3,500–₹4,600/CBM — growing market with new plant investments; lime supply from Rajasthan's abundant limestone deposits provides raw material cost advantage.
UP and Delhi-NCR: ₹3,800–₹5,200/CBM — large volume market, NGT brick kiln restrictions creating structural demand shift toward AAC. Significant price variation between NCR-adjacent plants and Lucknow/Kanpur markets.
Karnataka and Tamil Nadu: ₹4,000–₹5,400/CBM — strong market in Bengaluru and Chennai metro corridors; Tier 2 markets (Mysuru, Coimbatore, Madurai) developing rapidly.
Telangana and Andhra Pradesh: ₹3,600–₹4,800/CBM — Hyderabad market well-served; coastal AP market less competitive with supply opportunity.
Factors That Affect AAC Block Price
Raw Material Cost Drivers
Fly ash, cement, quicklime, and aluminum powder together constitute 55–65% of manufacturing cost per CBM. Cement is typically 8–12% by weight of the block but contributes 18–25% of material cost at current cement prices (₹380–₹420 per 50 kg bag in Maharashtra in 2026). Cement price movements — which follow coal and energy price trends — directly affect AAC block prices with a 2–3 month lag.
Plants located adjacent to or within 20 km of a thermal power station have a structural fly ash supply advantage. Fly ash delivered by NTPC or MAHAGENCO at the station boundary costs ₹0–₹500/tonne (often provided at nominal or zero cost to encourage utilisation). Plants more than 50 km from a power station may pay ₹800–₹2,000/tonne for fly ash including freight — a significant difference when fly ash constitutes 60–70% of block weight.
Transportation and Delivered Cost
AAC blocks are relatively lightweight (450–650 kg/m³ density versus 1,700 kg/m³ for red brick), which means more block volume fits on a standard truck — but transportation cost per CBM is still significant for long deliveries. Indicative freight rates in Maharashtra (2026): 0–50 km: ₹100–₹250/CBM; 50–150 km: ₹250–₹500/CBM; 150–300 km: ₹450–₹800/CBM; above 300 km: ₹700–₹1,200/CBM.
Always compare landed cost (plant price + freight + unloading) rather than plant-gate price alone. A regional plant 40 km away at ₹4,000/CBM often delivers better value than a national brand plant 250 km away at ₹4,500/CBM with ₹700/CBM freight — the landed cost difference is ₹1,200/CBM.
Block Density and IS Grade
Lighter Grade 1 blocks (D450–D500) cost 8–15% more to produce per CBM than standard Grade 2 blocks (D550–D650) because: higher aluminum powder consumption, stricter mix control requirements (more SCADA management time, higher reject risk), and longer autoclave curing cycles (reducing plant throughput per unit of autoclave capacity). This production cost premium is typically passed through as a 10–18% price premium to the buyer. For projects where thermal insulation performance or lightweight dead load reduction is being quantified in the structural engineer's calculations, this premium is usually justified.
Order Volume and Payment Terms
Large orders (50+ CBM) typically attract 5–12% discounts versus spot purchase pricing. Advance payment or bank LC payment often commands an additional 3–5% discount versus credit-period sales. For projects above 500 CBM, negotiate directly with the plant owner rather than through a distributor — the additional margin in the supply chain is negotiable at this scale.
How Many AAC Blocks Does Your Project Need?
Accurate quantity estimation prevents both the cost of excess inventory and the schedule delay of resupply. The calculation methodology:
Step 1: Calculate gross wall area — total wall length × height for all walls at each size specification. Subtract door and window openings.
Step 2: Convert area to volume — multiply net wall area (m²) by wall thickness (m) to get CBM of wall masonry.
Step 3: Add wastage allowance — standard allowance for site cutting, breakage, and handling: 5% for standard work, 7% for complex layouts with many openings, 10% for projects with curved walls or complex intersections.
Step 4: Calculate blocks from CBM — 100 mm blocks: approximately 83 blocks/CBM; 150 mm blocks: approximately 55 blocks/CBM; 200 mm blocks: approximately 42 blocks/CBM; 75 mm blocks: approximately 111 blocks/CBM.
Example: 1,000 sq ft (93 m²) single-floor house, 3 m ceiling height:
External walls (150 mm): perimeter approximately 40 m × 3 m height = 120 m², less openings (doors and windows ≈ 20 m²) = 100 m² net. Volume = 100 × 0.15 = 15 CBM.
Internal walls (100 mm): typically 60–80 m² net area. Volume = 70 × 0.10 = 7 CBM.
Total AAC volume (plus 7% wastage): 22 CBM × 1.07 = 23.5 CBM.
Block quantities: 15 CBM × 55 = 825 pieces (150 mm) + 8.5 CBM × 83 = 705 pieces (100 mm).
AAC vs Red Brick: A Cost Comparison for Wall Construction
The comparison buyers most often ask about is total installed wall cost — not just material price per unit. For a standard external wall in Maharashtra in 2026:
AAC 150 mm wall (per m²): Block material ₹550–₹750 + thin-bed jointing mortar ₹60–₹90 + mason labour ₹120–₹180 = Total ₹730–₹1,020/m²
Red brick 230 mm wall (per m²): Brick material ₹380–₹520 + cement-sand mortar ₹80–₹120 + mason labour ₹180–₹260 (more joints, more labour) = Total ₹640–₹900/m²
On a pure installed wall cost comparison, red brick and AAC are broadly competitive in Maharashtra — with AAC slightly more expensive per m² in some cases. The AAC value case is made on the systems benefits: lighter structure (lower foundation and frame cost), faster construction (AAC masons lay 3–4× the area per day), better thermal insulation (reduces HVAC sizing), and lower plaster consumption (dimensional accuracy eliminates thick-bed correction plastering).
Buying AAC Blocks for Large Projects: Checklist
- Confirm BIS certification (IS 2185 Part 3 licence) — request the licence number and verify on the BIS website
- Request quality test reports (compressive strength, density, water absorption) from a NABL-accredited laboratory dated within 6 months
- Visit the plant or request a factory visit — see the production process and quality control systems firsthand
- Clarify the density class and declared compressive strength for the specific grade being quoted
- Confirm delivery schedule capability — can the plant guarantee delivery within your construction programme window?
- Get a sample pallet before committing the full order — verify actual density (weigh a block and measure dimensions) against declared specification
For bulk purchase inquiries, regional pricing guidance, or to understand AAC block plant investment options (producing your own blocks for construction or commercial sale), contact Maruti Hydraulics at +91-253-2308131. View our complete AAC plant equipment range or learn about the economics of AAC block manufacturing in our plant setup cost guide.