OnlineCalculator360
Result
How the Calculator Works
Enter the length and width of your rectangle in the same unit and the calculator multiplies them to give the area. The formula is shown live at the bottom with the actual numbers substituted in, so you can confirm the result is correct before using it in a purchase order or site plan.
One thing to watch: if your room or plot has irregular protrusions (a bay window, pillar recess, or cutout), measure the main rectangle first, then add or subtract the smaller rectangular sections. The total is the sum of those individual calculations.
Formula and Worked Example
Perimeter = 2 × (Length + Width)
Both measurements must be in the same unit before calculating.
A master bedroom measures 4.2 m (length) × 3.6 m (width).
Area = 4.2 × 3.6 = 15.12 m²
Tiles (60 cm × 60 cm = 0.36 m² each):
Tiles needed = 15.12 ÷ 0.36 = 42 tiles
Add 10% for wastage: 42 × 1.1 = 47 tiles (order 48 for a full box)
Wall paint (one wall, 4.2 m × 2.85 m ceiling height):
Wall area = 11.97 m² − door opening (2.1 × 0.9 = 1.89 m²) = 10.08 m²
At 11 m² per litre coverage: 0.92 litres for one coat
Real-World Applications in Indian Homes
Rectangle area comes up at every stage of home buying, renovation, and gardening. Here are the most common scenarios and what the area figure feeds into:
| Task | Rectangle You Measure | How Area Is Used |
|---|---|---|
| Flooring / tiling | Room floor | Tile count (area ÷ tile size) + 10% wastage |
| Interior wall paint | Each wall | Subtract doors/windows; divide by paint coverage rate |
| Carpet or rug sizing | Seating zone | Standard rug sizes (120×180 cm, 160×230 cm, 200×300 cm) |
| Vegetable patch | Garden plot | Plant spacing grid and soil bag count |
| Plot area for stamp duty | Land parcel | Convert m² to sq yards or local unit for registration |
| False ceiling material | Ceiling area | Gypsum board or POP sheets needed |
Unit Conversion Reference
India uses a mix of metric, imperial, and traditional area units depending on the state and context. Here is a quick reference for converting your m² result:
| Unit | Equals (in m²) | Common Use |
|---|---|---|
| 1 sq ft | 0.0929 m² | Apartment carpet area, tile and flooring quotes |
| 1 sq yard | 0.836 m² | Plot area in North India registration documents |
| 1 cent | 40.47 m² | Small agricultural plots in South India |
| 1 ground | 222.97 m² | Residential plots in Chennai and Tamil Nadu |
| 1 guntha | 101.17 m² | Agricultural land in Maharashtra and Karnataka |
| 1 acre | 4,046.86 m² | Large agricultural land parcels across India |
Frequently Asked Questions
Area = Length × Width. A room 4.5 m by 3.2 m has an area of 4.5 × 3.2 = 14.4 m².
Multiply m² by 10.764. A 14.4 m² room = 14.4 × 10.764 = 155 sq ft. Tile and flooring vendors in India often quote per sq ft.
Calculate wall area (height × width), subtract door and window openings, then divide by the paint coverage rate (10 to 12 m² per litre for standard emulsion). Add 10% for a second coat.
Carpet area is the usable floor space inside the walls. Built-up area adds wall thickness. Super built-up area also includes shared lobby and corridor space. Carpet area is typically 70 to 80% of super built-up area.
Divide floor area by tile area. For a 14.4 m² floor with 60 × 60 cm tiles (0.36 m²): 14.4 ÷ 0.36 = 40 tiles. Always buy 10% extra for cuts and breakage.
Plots are registered in sq yards (North India), cents or grounds (South India), or gunthas (Maharashtra/Karnataka). Calculate in metres and convert using: 1 sq yard = 0.836 m²; 1 cent = 40.47 m²; 1 ground = 222.97 m².
Yes. Calculate the rectangular lawn area, add 5 to 10% for edge trimming, and order that total. Artificial turf comes in roll widths of 2 m or 4 m, so factor in roll-width wastage for non-standard room widths.
Split the L-shape into two rectangles, calculate each area separately, and add them. Example: 4 × 3 m (12 m²) + 2 × 2 m (4 m²) = 16 m² total.