Spike's Calculators

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Fixed Area Plot, Acres

Spike VM

Determine the area in acres, for a circular plot

Formula used:
A = πR² ÷ 43560 (there are  43560 ft² in one acre)
where A = area
R = radius
π = 3.14159
example:
diameter of plot = 66 feet (ft)--R = diameter ÷ 2
66  ÷  2  =  33  ft for the radius
3.14159 * ( 33*33) ÷ 10000 = A
3.14159 * 1089 =  3421.19151 ÷ 43560 = 0.07853975 acres (ac) or 1 ÷ 0.07853975 = 1 :  12.7 of an  acre (ac)

Fixed Area Plots, Acres

Diameter of Plot ft
Decimal Rounding #

Results:

Plot Area in Acres ac
1 : of an acre

Conversion

  1. the diameter of the plot in feet
  2. select number of digits required for the result

Result

  1. the area of the plot in square feet
  2. the plot area in (part of) acres
  3. fraction of an acre
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