Treatment Area Square Footage Calculator

Enter each piece of the yard and house as a simple shape, sum them into one total treatable area, and convert to acres. Separately, turn the house footprint into a foundation perimeter in linear feet and a pre-computed ground-band area at your chosen band width. Area drives broadcast / turf work; perimeter drives barrier work — they are kept apart so you never multiply the wrong number by your label rate.

rectangle  = length × width
triangle   = (base × height) / 2
circle     = π × radius²        (π = 3.14159)

total area = Σ shape areas
acres      = total area / 43,560

perimeter  = 2 × (length + width)   (or your measured perimeter)
band area  = perimeter × band width   (band width clamped to 3–10 ft)

advisory (optional, label governs):
  per 1,000 sq ft → rate × (total area / 1,000)
  per acre        → rate × (total area / 43,560)

Shape formulas and the per-acre arithmetic follow the University of Tennessee Pesticide Safety and Education Program common calculations (1 acre = 43,560 sq ft). The 3-ft-up / 3-ft-out standard band that widens to 10 ft under heavy pressure follows the perimeter-treatment practice. The product-amount readout is a linear scale of your own rate — it does no concentrate, dilution, or volume math and is advisory only.