# Circular inch conversions

The circular inch conversion selector on this page selects the area/surface measurement unit to convert to starting from circular inches (circ in). To make a conversion starting from a unit of area other than circular inch, simply click on the "Reset" button.

## About circular inch

The **circular inch** is a unit of area in the Imperial and US customary systems of units equal to 5.067075 × 10^{-4} square meters (1 circular inch = 5.067075 × 10^{-4} m^{2}), the standard derived unit of area in the International System of Units (SI).

The circular inch (circ in) is also equal to 5.067075 square centimeters (cm^{2}), or 506.7075 square millimeters (mm^{2}), or 506.707.5 × 10^{6} square micrometers (μm^{2}) or 5.067075 × 10^{14} square nanometers (nm^{2}) (units of area in the SI), or about 785,398.196 square mils, or 0.785398196 square inches (sq in) or 0.00545415414 square feet (sq ft), which are Imperial / US customary units of area.

The circular inch (circ in) is an Imperial / US customary unit of area. The inch (in) is a unit of length in the Imperial and US customary systems of units. An area of 1.0 circular inch is the area of a circle that is 1.0 inch in diameter.

The conversion formula between square inches and circular inches:

Square Inches = π/4 × Circular Inches

The circular inch is used to specify the area of the cross section of a cable or wire.

Symbol: circ in

Plural: circular inches

Circular inch conversions: a compehensive list with conversions from circular inches to other (metric, imperial, or customary) area and surface measurement units is shown below.

- circular inch to acre (circ in to ac)
- circular inch to acre (US survey) (circ in to ac)
- circular inch to are (circ in to a)
- circular inch to carreau
- circular inch to centiare (circ in to ca)
- circular inch to circular mil (circ in to cmil)
- circular inch to decare (circ in to daa)
- circular inch to dunam
- circular inch to hectare (circ in to ha)
- circular inch to mu
- circular inch to ping
- circular inch to pyong
- circular inch to rood (circ in to ro)
- circular inch to section
- circular inch to square centimeter (circ in to sq cm)
- circular inch to square chain (circ in to sq ch)
- circular inch to square decameter (circ in to sq dam)
- circular inch to square decimeter (circ in to sq dm)
- circular inch to square foot (circ in to sq ft)
- circular inch to square hectometer (circ in to sq hm)
- circular inch to square inch (circ in to sq in)
- circular inch to square kilometer (circ in to sq km)
- circular inch to square meter (circ in to sq m)
- circular inch to square micrometer (circ in to sq μm)
- circular inch to square mil (circ in to sq mil)
- circular inch to square mile (circ in to sq mi)
- circular inch to square millimeter (circ in to sq mm)
- circular inch to square nanometer (circ in to sq nm)
- circular inch to square yard (circ in to sq yd)
- circular inch to stremma