🏗️ Certified Civil Engineering Formulas

Construction Material & House Cost Calculator

Free construction material calculator: estimate cement bags, steel TMT bars, bricks, concrete volume, and turnkey house cost per sq ft.

Concrete Volume & Cement Bags Estimator

Calculate exact cement bags, sand, and aggregate needed for roof slab, columns, beams, or flooring.

Slab / Floor Area (Square Feet):

Thickness (Inches):

Concrete Mix Grade:

Cement Required
95 Bags
(50 kg bags / ~4,750 kg)

Sand (Fine Aggregate)

171 cu ft

(Approx 7.7 metric tonnes)

Aggregate (Gravel/Gitti)

342 cu ft

(Approx 14.5 metric tonnes)

Wet Concrete Volume

416.7 cu ft

(11.80 m³ / Dry Vol: 18.17 m³)

Steel Rebar (TMT) Weight & Requirement Calculator

Estimate structural steel requirements using standard IS 1786 formula (W = D² / 162 kg/m).

Area Thumb Rule (Whole House) Specific Bar Diameter & Length

Built-up Area (Square Feet):

Structure Type:

Total Steel Rebar
4,000 kg
(4.00 Metric Tonnes)

Estimated Steel Cost

₹2,60,000

(@ ₹65 / kg average market rate)

Recommended Diameter Mix

12mm (45%), 10mm (30%), 8mm (25%)

Standard residential distribution

Brick & Mortar Requirement Calculator

Estimate bricks, cement, and sand needed for exterior (9") and partition (4.5") walls.

Wall Length (Feet):

Wall Height (Feet):

Wall Thickness:

Deductions for Doors/Windows (Sq Ft):

Bricks Required
4,275 Bricks
(Includes 5% standard handling wastage)

Net Wall Area

450 sq ft

(Gross: 500 sq ft - 50 sq ft openings)

Cement for Mortar (1:6)

6 Bags

(50 kg bags)

Sand for Mortar

42 cu ft

(Approx 1.9 tonnes)

Paint, Primer & Putty Coverage Estimator

Estimate paint liters for interior walls, ceilings, and exterior surfaces.

Total Surface Area (Square Feet):

Surface Type:

Paint Needed (2 Coats)
25 Liters
(Standard 2 coats finish)

Primer Needed (1 Coat)

11 Liters

(130 sq ft / liter coverage)

Wall Putty (2 Coats)

125 kg

(approx 3 bags of 40kg)

Complete House Construction Cost Estimator (2026)

Estimate turnkey civil + finishing construction cost for any plot or built-up area in India.

Total Built-Up Area (Square Feet):

Construction Quality Tier:

Total Estimated Cost
₹21,00,000
(₹1,750 per sq ft)

Civil Structure (Cement, Steel, Sand, Bricks)

₹10,50,000

(~50% of total budget)

Finishing (Flooring, Paint, Woodwork)

₹6,30,000

(~30% of total budget)

Labor & MEP (Electrical + Plumbing)

₹4,20,000

(~20% of total budget)

Standard TMT Rebar Diameter & Weight Chart (IS 1786)

Diameter (mm)	Weight per Meter (kg/m)	Weight per Foot (kg/ft)	Weight per 12m Bar	Application
8 mm	0.395 kg/m	0.12 kg/ft	4.74 kg	Stirrups, Ties, Distribution Bars
10 mm	0.617 kg/m	0.188 kg/ft	7.4 kg	Roof Slabs, Chajjas, Lintels
12 mm	0.888 kg/m	0.271 kg/ft	10.66 kg	Main Slab Bars, Beams, Columns
16 mm	1.578 kg/m	0.481 kg/ft	18.94 kg	Columns, Plinth Beams, Heavy Slabs
20 mm	2.469 kg/m	0.753 kg/ft	29.63 kg	Heavy Columns, Foundation Footings
25 mm	3.858 kg/m	1.176 kg/ft	46.3 kg	Raft Footings, Retaining Walls
32 mm	6.313 kg/m	1.924 kg/ft	75.76 kg	Commercial High-Rise Columns, Bridges

🌾 Converting Plot Area from Land Records?

Before estimating materials, verify your exact plot size in Square Feet using state land converters:

1 Bigha in UP1 Bigha in UP (Uttar Pradesh) Land Measurement Calculator 1 Bigha to Sq Ft UPBigha to Sq Ft Converter (Uttar Pradesh Land Records)1 Bigha to Gaj in UP1 Bigha to Gaj in UP (Uttar Pradesh Square Yards Calculator)1 Bigha to Biswa UP1 Bigha to Biswa Calculator (Uttar Pradesh Revenue Code)1 Biswa to Sq Ft UP1 Biswa to Sq Ft Calculator (Uttar Pradesh Land Units)1 Kaccha Bigha to Sq Ft UP1 Kaccha Bigha to Square Feet Calculator (UP Rural Land)

常见问题解答

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.