AAC Block vs Clay Brick Quantity & Plaster Dry-Mortar Formulas (IS 2185 & IS 1661)
Deterministic Engineering Equation (IS 2185 / IS 1661)
AAC Blocks / m² = 1 ÷ (0.60m × 0.20m) = 8.33 Blocks/m² | Modular Bricks / m³ (with mortar) = 500 Bricks/m³
Every standard Indian AAC block measures 600 mm length × 200 mm height, giving a face area of 0.12 m² (1.29 sq.ft)—so 8.33 blocks cover 1 m² regardless of whether block thickness is 100mm, 150mm, or 200mm. Dry density of AAC blocks (550–650 kg/m³) is ~65% lighter than burnt clay brickwork (1,920 kg/m³), cutting structural dead load on RCC beams and footings. For cement plaster, wet thickness is multiplied by 1.33 (dry mortar void factor) × 1.12 (uneven joint filling & rebound allowance).
AAC Block Sizes, Blocks Per Cubic Meter & 2026 Masonry Comparison
Use the verified 2026 commercial procurement and site-execution benchmarks below when reviewing contractor quotations across Noida, Greater Noida, Gurugram, New Delhi, Faridabad, and major Indian metros:
| Specification / Grade | Governing Standard | 2026 Benchmark Rate / Constant | Engineering Application & QA Hold-Point |
|---|---|---|---|
| 100 mm AAC Block (600×200×100) | IS 2185 Part 3 | 83.3 Blocks per m³ (0.77 blk/sq.ft) | Internal office/hotel partitions; mandatory 75mm RCC patli band every 1.2m height. |
| 150 mm AAC Block (600×200×150) | IS 2185 Part 3 | 55.5 Blocks per m³ (0.52 blk/sq.ft) | Corridor walls, shaft enclosures & acoustic hospital inter-room partitions. |
| 200 mm AAC Block (600×200×200) | IS 2185 Part 3 | 41.67 Blocks per m³ (0.39 blk/sq.ft) | High-insulation commercial & residential external building envelopes (R-value advantage). |
| 230 mm (9") Red / Fly-Ash Brick | IS 1077 / IS 2212 | 500 Bricks per m³ (~10.5 brk/sq.ft) | High point-load anchorage walls, underground sumps & wet shaft masonry. |
| 12mm / 15mm Bull-Mark Plaster | IS 1661:1972 | ₹42 – ₹58 / sq.ft (Mat + Labour) | 1:4 coarse washed plaster sand + GI chicken wire mesh across all RCC-to-block joints. |
Planning a Real Project in Noida, Greater Noida, Gurugram or New Delhi?
Parth Enterprises self-performs this trade directly with in-house civil supervisors, laser datum instrumentation, and GST-registered commercial billing (GSTIN: 07JJWPK3062E1ZT). Inspect our dedicated execution specifications here:
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