Spike's Calculators

Calculate the area of a circle from diameter measured in foot and inch with results in square feet and acres.

- the circle's diameter in feet and inches
- decimal precision, the number of digits after the decimal point

- area of circle in square feet
- area of circle in acres

one square foot (ft²) = 0.0000229568411386593 acres (ac) one acre (ac) = 43560 square feet (ft²)

A = 𝝅/4D² where A is the area of the circle 𝝅= 3.14159265 D the diameter

14 + 8 ÷ 12 (inch to foot value) = 14.66666666666667

14 ft - 8 in = 14.66666666666667 feet

(3.14159265 ÷ 4) * (14.66666666666667²) 0.785398 * 215.111111111208 = 168.947836

A circle with a diameter of 14 ft - 8 in has an area of 168.948 square feet.

- Area of a Circle from Diameter in Metres
- Area of a Circle from Foot and Inch Diameter
- Basal Area from Diameter in Centimetres
- Basal Area from Diameter in Inches
- Basal Area from Girth Measured @ Breast Height in Centimetres
- Basal Area from Girth Measured @ Breast Height in Inches
- Circumference (Girth) of a Log from Diameter, Foot and Inch
- Convert Diameter in Centimetres to Girth in Inches
- Circumference (Girth) of a Log from Diameter, Inch and Fraction
- Diameter of Tree from Circumference Measurement
- Diameter/Centimetres to Inches/Quarter Girth
- Fixed Area Plot, Acres
- Fixed Area Plots, Hectares
- Number of Trees and Tree Spacing Calculated from Basal Area
- Square Feet (Quarter Girth) to Square Centimetres
- Square Feet (Quarter Girth) to Square Metres
- Trees per Hectare to Trees per Acre
- Trees per Acre to Trees per Hectare