Construction Material & House Cost Calculator
Estimate required building materials and turnkey civil construction costs for any plot or residential house in India. Instant calculation for Cement Bags, Steel Rebar (TMT), Bricks, Concrete Volume, Paint, and Budget per square foot.
Concrete Volume & Cement Bags Estimator
Calculate exact cement bags, sand, and aggregate needed for roof slab, columns, beams, or flooring.
Steel Rebar (TMT) Weight & Requirement Calculator
Estimate structural steel requirements using standard IS 1786 formula (W = D² / 162 kg/m).
Brick & Mortar Requirement Calculator
Estimate bricks, cement, and sand needed for exterior (9") and partition (4.5") walls.
Paint, Primer & Putty Coverage Estimator
Estimate paint liters for interior walls, ceilings, and exterior surfaces.
Complete House Construction Cost Estimator (2026)
Estimate turnkey civil + finishing construction cost for any plot or built-up area in India.
Standard Civil Engineering Formulas & Thumb Rules
🔩 Steel TMT Weight Formula (IS 1786)
Where D is the diameter of the bar in millimeters. For 12mm rebar: 12² / 162 = 144 / 162 = 0.888 kg/m. Standard bar length is 12 meters (approx 40 feet).
🧱 Concrete Dry Volume Factor
When water is added to dry ingredients, entrained air voids decrease. To produce 1 m³ of wet concrete, 1.54 m³ of dry materials (cement + sand + gravel) are required.
🧱 Standard Brickwork Thumb Rule
Standard Indian modular brick measures 190 × 90 × 90 mm (with 10mm mortar = 200 × 100 × 100 mm). For 9" external walls, estimate 9.5 to 10 bricks per sq ft. For 4.5" partition walls, estimate 4.75 to 5 bricks per sq ft.
🏗️ House Steel Requirement Rule of Thumb
A standard residential building (G+1 or G+2) requires roughly 3.5 to 4.5 kg of TMT rebar per square foot of total covered area. For a 1,200 sq ft house, anticipate 4.2 to 5.4 metric tonnes of steel.
🌾 Converting Plot Area from State Land Records?
Before estimating materials, verify your exact plot size in Square Feet! Use our certified regional converters for Bigha, Biswa, Gaj, Kanal, Guntha, and Cent across all Indian states:
Frequently Asked Questions
How many bags of cement are needed for 1,000 square feet of roof slab casting?
For a 1,000 sq ft roof slab with a standard 5-inch thickness (0.416 ft), total concrete volume is 416 cubic feet (~11.8 cubic meters). Using standard M20 grade RCC (1:1.5:3 mix ratio), approximately 90 to 95 bags of cement (50 kg each) are required, along with ~170 cubic feet of sand and ~340 cubic feet of coarse aggregate gravel.
How do you calculate steel (TMT rebar) weight using bar diameter?
Use the standard Indian Standard (IS 1786) formula: Weight (kg/meter) = D² / 162, where D is the diameter of the TMT bar in millimeters. For example: 8mm = 8² / 162 = 0.395 kg/m; 10mm = 10² / 162 = 0.617 kg/m; 12mm = 12² / 162 = 0.888 kg/m; 16mm = 16² / 162 = 1.578 kg/m.
How many kilograms of steel are required per square foot of house construction?
By thumb rule in India, a standard G+1 or G+2 residential house requires approximately 3.5 kg to 4.5 kg of steel per square foot of built-up area. For a 1,000 sq ft house, you will need approximately 3.5 to 4.5 metric tons (3,500 kg to 4,500 kg) of TMT steel rebar.
How many bricks are required per 100 square feet of wall?
For a 4.5-inch partition wall, you need approximately 450 to 500 standard modular bricks per 100 square feet. For a 9-inch load-bearing exterior wall, you need approximately 900 to 1,000 bricks per 100 square feet (including 5% wastage and mortar joints).
What is the current construction cost per square foot in India in 2026?
Average residential construction costs in Tier-1 and Tier-2 Indian cities range from ₹1,200 to ₹1,400/sq ft for budget construction, ₹1,600 to ₹1,900/sq ft for standard high-quality finish, and ₹2,200 to ₹3,000+/sq ft for luxury architectural construction.
How much area does 1 liter of paint cover?
1 liter of interior emulsion paint covers approximately 100 to 130 square feet for 2 coats. 1 liter of primer covers approximately 120 to 150 square feet for 1 single coat. Exterior weather-coat paint covers approximately 60 to 80 square feet for 2 coats due to wall roughness.