Length & Width to Area Calculator A = L·W

Area Dimensions [?]
Length (L)

Width (W)

Calculate Area [?]
Area (A)

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Contents

User Guide

This tool will calculate the area of a rectangle from the dimensions of length and width. No manual conversion is necessary for length, width and area units, which can all be selected independently. The calculator will take care of the conversion of values entered in different units.

Once the measurements for length and width have been entered, along with the preferred units for each parameter, the calculated area value will be shown in the answer box highlighted in red. Also a graphic will be shown of a scaled drawing to the correct proportions and labelled with each dimension and calculated area.

Formula

The formula used by this calculator to calculate the area of a rectangular shape is:

A = L · W

Symbols

A= Area
L = Length
W = Width

Area Dimensions – Length & Width

Enter the measurements for length and width for the rectangular shape you are calculating, and select the appropriate units for each measurement value entered.

The following conversion factors in metres (m) are used for converting length and width into different units:

SI Metric Prefix Length Units

quectometre (qm) – 1 x 10^-30 m
rontometre (rm) – 1 x 10^-27 m
yoctometre (ym) – 1 x 10^-24 m
zeptometre (zm) – 1 x 10^-21 m
attometre (am) – 1 x 10^-18 m
femtometre (fm) – 1 x 10^-15 m
picometre (pm) – 1 x 10^-12 m
nanometre (nm) – 1 x 10^-9 m
micrometre (µm) – 0.000001 m
millimetre (mm) – 0.001 m
centimetre (cm) – 0.01 m
decimetre (dm) – 0.1 m
metre (m) – 1 m
decametre (dam) – 10 m
hectometre (hm) – 100 m
kilometre (km) – 1,000 m
megametre (Mm) – 1,000,000 m
gigametre (Gm) – 1 x 10⁺⁹ m
terametre (Tm) – 1 x 10⁺¹² m
petametre (Pm) – 1 x 10⁺¹⁵ m
exametre (Em) – 1 x 10⁺¹⁸ m
zettametre (Zm) – 1 x 10⁺²¹ m
yottametre (Ym) – 1 x 10⁺²⁴ m
ronnametre (Rm) – 1 x 10⁺²⁷ m
quettametre (Qm) – 1 x 10⁺³⁰ m

Imperial and US Length Units

thousandth of an inch (thou) – 0.0000254 m
inch (in) – 0.0254 m
foot (ft) – 0.3048 m
yard (yd) – 0.9144 m
mile (mi) – 1,609.344 m
nautical mile (nmi) – 1,852 m

Astronomical Units

astronomical unit (au) – 149,597,870,700 m
light-year (ly) – 9,460,730,472,580,800 m
parsec (pc) – 30,856,775,814,913,672.789… m
kiloparsec (kpc) – 3.0856775814913672789… x 10⁺¹⁹ m
megaparsec (Mpc) – 3.0856775814913672789… x 10⁺²² m
gigaparsec (Gpc) – 3.0856775814913672789… x 10⁺²⁵ m

Area Calculation

This is the calculated area of the rectangle, which this tool determines by multiplying together the length and width measurements. Select the required area measurement units to display the result.

The following conversion factors in square metres (m²) are used to convert the calculated area into different units:

Square Metre SI Metric Prefix Area Units

square quectometre (sq qm) – 1 x 10^-60 m²
square rontometre (sq rm) – 1 x 10^-54 m²
square yoctometre (sq ym) – 1 x 10^-48 m²
square zeptometre (sq zm) – 1 x 10^-42 m²
square attometre (sq am) – 1 x 10^-36 m²
square femtometre (sq fm) – 1 x 10^-30 m²
square picometre (sq pm) – 1 x 10^-24 m²
square nanometre (sq nm) – 1 x 10^-18 m²
square micrometre (sq µm) – 1 x 10^-12 m²
square millimetre (sq mm) – 0.000001 m²
square centimetre (sq cm) – 0.0001 m²
square decimetre (sq dm) – 0.01 m²
square metre (sq m) – 1 m²
square decametre (sq dam) – 100 m²
square hectometre (sq hm) – 10,000 m²
square kilometre (sq km) – 1,000,000 m²
square megametre (sq Mm) – 1 x 10⁺¹² m²
square gigametre (sq Gm) – 1 x 10⁺¹⁸ m²
square terametre (sq Tm) – 1 x 10⁺²⁴ m²
square petametre (sq Pm) – 1 x 10⁺³⁰ m²
square exametre (sq Em) – 1 x 10⁺³⁶ m²
square zettametre (sq Zm) – 1 x 10⁺⁴² m²
square yottametre (sq Ym) – 1 x 10⁺⁴⁸ m²
square ronnametre (sq Rm) – 1 x 10⁺⁵⁴ m²
square quettametre (sq Qm) – 1 x 10⁺⁶⁰ m²

English Imperial and US Area Units

square thousandth of an inch (sq thou) – 6.4516 x 10^-10 m²
square inch (sq in) – 0.00064516 m²
square foot (sq ft) – 0.09290304 m²
square yard (sq yd) – 0.83612736 m²
acre (ac) – 4046.8564224 m²
square mile (sq mi) – 2589988.110336 m²
square nautical mile (sq nmi) – 3429904 m²

Are Metric Prefix Area Units

centiare (ca) – 1 m²
deciare (da) – 10 m²
are (a) – 100 m²
decare (daa) – 1000 m²
hectare (ha) – 10000 m²

Square Astronomical Area Units

square astronomical unit (sq au) – 2.237952291797391849 x 10⁺²² m²
square light-year (sq ly) – 8.950542107481892730061252864 x 10⁺³¹ m²
square parsec (sq pc) – 9.5214061369184135543188504845736… x 10⁺³² m²
square kiloparsec (sq kpc) – 9.5214061369184135543188504845736… x 10⁺³⁸ m²
square megaparsec (sq Mpc) – 9.5214061369184135543188504845736… x 10⁺⁴⁴ m²
square gigaparsec (sq Gpc) – 9.5214061369184135543188504845736… x 10⁺⁵⁰ m²

Applications

Use this length x breadth calculator to determine the area in the following applications:

Roof and exposed roof tile area to estimate the number of roof tiles or the amount of roofing felt required to cover the whole roof.
Seating area to determine the approximate crowd capacity.
Car park and parking space area to determine the maximum number of cars spaces
Warehouse storage floor area capacity.
Freezer or chiller room floor area capacity.
Floor area from room dimensions in mixed measurement units
Feed, weed, seed or fertilizer area coverage for a field or garden from distance between corners
Paint, wallpaper or tile area coverage from wall, ceiling or floor, width & height dimensions
Number of items produced from a length & width of textile, cloth or fabric.
Plot of land area or the footprint of a building.
Amount of required insulation to cover a loft space.
How much laminate flooring is needed to fill a floor space.
Area of a path, decking or patio to help estimate how long it will take to pressure wash.
Number of building plots of a length and width are possible on an area of land in hectares or acres.
Floor, wall or ceiling area of a reception room, lounge, kitchen, living room, dining room, hallway, staircase, bedroom, bathroom, toilet, study, tv room, garage cellar or a basement storage room.
How much space furniture will take up in a room.
Room areas from the dimensions on a house plan.
Patio border area to cover with gravel.
Floorspace sq area of a workshop.
Horse paddock area.
Driveway surface area to decide quantity of building materials required
Garden, patio or courtyard landscaping project area to calculate the number of paving slabs required
Counter tops, shelves & display cabinets area to calculate working area, leftover space or number of stock items that can be displayed.
Fencing required to fill a boundary of a specified length and height.