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Acceleration (m/s2)
Angle [plane] (rad)
Area (sqm)
Data Storage (B)
Data Transfer Rate (B/s)
Density (kg/m3)
Electric Charge (C)
Electric Current (A)
Electric Resistance (Ω)
Energy (J)
Force (N)
Frequency (Hz)
Fuel (km/L)
Length [m]
Mass, Weight (kg)
Mass Flow Rate (kg/s)
Power (W)
Pressure (Pa)
Speed (m/s)
Temperature (K)
Time (s)
Torque (N.m)
Volume (L)
Volume Flow Rate (m3/s)
Quantity (i)

Area (symbolized A ) is a two-dimensional quantity representing amount or extent of surface. The standard unit of area in the International System of Units (SI) is the meter squared (m2). Area is usually measured or defined on a flat surface, also called a Euclidean plane, or on a spherical surface.

Every unit of length has a corresponding unit of area, namely the area of a square with the given side length. Thus areas can be measured in square meters (m2), square centimeters (cm2), square millimeters (mm2), square kilometers (km2), square feet (ft2), square yards (yd2), square miles (mi2), and so forth. Algebraically, these units can be thought of as the squares of the corresponding length units.

- Acres (ac) ⇛
- Ares (a) ⇛
- Arpents (arp) ⇛
- Barns (barn) ⇛
- Bunders (b) ⇛
- Carreau (carreau) ⇛
- Carucate (carucate) ⇛
- Cawneys (cawney) ⇛
- Centiares (ca) ⇛
- Circular Inches (c in) ⇛
- Circular Mils (c mil) ⇛
- Cuerdas (cuerda) ⇛
- Decares (daa) ⇛
- Deciares (da) ⇛
- Dekares (da a ) ⇛
- Dhurs (dhur) ⇛
- Dunams (dunam) ⇛
- Electron Cross Sections (ecs) ⇛
- Farthingales (fa) ⇛
- Feddans (feddan) ⇛
- Football Fields (ff) ⇛
- Hectares (ha) ⇛
- Homesteads (hs) ⇛
- Jeribs (jerib) ⇛
- Jo JAPAN (jo) ⇛
- Kapplands (kapp) ⇛
- Morgen GERMANY (mrg DE) ⇛
- Morgen SOUTH AFRICA (mrg SA) ⇛
- Nooks (nook) ⇛
- Oxgangs (oxs) ⇛
- Pings (ping) ⇛
- Planck Areas (Ap) ⇛
- Plazas (plaza) ⇛
- Pyeongs (pyeong) ⇛
- Rais (ไร่) ⇛
- Roods (rood) ⇛
- Sabins (sabin) ⇛
- Sections (section) ⇛
- Soccer Fields (soccer field) ⇛
- Square Angstroms (Å2, sq Å) ⇛
- Square Astronomical Units (au2, sq au) ⇛
- Square Calibers (sq cal) ⇛
- Square Centimeters (cm2, sq cm) ⇛
- Square Chains (sq ch) ⇛
- Square Cubits (sq cubit) ⇛
- Square Decameters (dam2, sq dam) ⇛
- Square Decimeters (dm2, sq dm) ⇛
- Square Dekameters (dm2, sq dam) ⇛
- Square Digits (sq digit) ⇛
- Square Fathoms (sq fath) ⇛
- Square Feet (ft2, sq ft) ⇛
- Square Hectometers (hm2, sq hm) ⇛
- Square Inches (in2, sq in) ⇛
- Square Kilometers (km2, sq km) ⇛
- Square Leagues NAUTICAL (sq leag [nautical]) ⇛
- Square Leagues US STATUTE (sq leag [US]) ⇛
- Square Links GUNTER SURVEY (sq li [survey]) ⇛
- Square Links RAMDEN ENGINEER (sq li [engineer]) ⇛
- Square Meters (m2, sq m) ⇛
- Square Micrometers (μ2, sq μ) ⇛
- Square Miles (mi2, sq mi) ⇛
- Square Millimeters (mm2, sq mm) ⇛
- Square Mils (sq mil) ⇛
- Square Nanometers (nm2, sq nm) ⇛
- Square Parsecs (sq pc) ⇛
- Square Perch (sq perch) ⇛
- Square Poles (sq pole) ⇛
- Square Rods (sq rod) ⇛
- Square Yards (yd2, sq yd) ⇛
- Stangs (stang) ⇛
- Tatamis JAPAN (tatami) ⇛
- Tonde Land (tondeland) ⇛
- Townships (township) ⇛
- Tsubo (tsubo) ⇛
- Tunnlands (tunnland) ⇛
- Varas Castellanas Cuads (varas-castellana) ⇛
- Varas Conuqueras Cuads (varas-conuquera) ⇛
- Virgates (virgate) ⇛

- Carucate -> Rais
- Rais -> Carucate
- Barns -> Square Dekameters
- Square Dekameters -> Barns
- Varas Conuqueras Cuads -> Square Yards
- Square Yards -> Varas Conuqueras Cuads
- Tonde Land -> Square Decimeters
- Square Decimeters -> Tonde Land
- Square Perch -> Electron Cross Sections
- Electron Cross Sections -> Square Perch
- Acres -> Morgen GERMANY
- Morgen GERMANY -> Acres
- Dekares -> Square Fathoms
- Square Fathoms -> Dekares
- Plazas -> Square Hectometers
- Square Hectometers -> Plazas
- Square Leagues NAUTICAL -> Square Kilometers
- Square Kilometers -> Square Leagues NAUTICAL
- Square Links RAMDEN ENGINEER -> Kapplands
- Kapplands -> Square Links RAMDEN ENGINEER