Granular load-out is simple proportion math. Pick how your product label quotes the rate, enter your area, and we return the pounds to load, the bags to buy, and what is left over.

Rate per 1,000 sq ft (broadcast / fire-ant):
  product_lb = (area_sqft / 1,000) × rate_lb_per_1,000

Coverage per bag (label says "covers N sq ft"):
  product_lb   = (area_sqft / coverage_per_bag) × bag_lb
  implied_rate = (bag_lb / coverage_per_bag) × 1,000   (lb / 1,000 sq ft)

Perimeter band (linear feet × band width):
  area_sqft  = perimeter_ft × band_width_ft
  product_lb = (area_sqft / 1,000) × rate_lb_per_1,000

Bags, buffer & leftover (all modes):
  product_with_buffer = product_lb × (1 + waste% / 100)
  bags                = ceil(product_with_buffer / bag_lb)   ← whole bags
  leftover_lb         = bags × bag_lb − product_with_buffer
  product_oz          = product_lb × 16                      ← bait-label readout

Acre conversion: 1 acre = 43,560 sq ft.
Optional cost: cost = bags × cost_per_bag  (you pay for whole bags).

The rate is yours, not ours. Granular labels span sub-ounce baits to about 4.6 lb per 1,000 sq ft, so no single "typical" rate is correct for every product. The 2 lb/1,000 sq ft default is a generic starting point — replace it with your label's figure. The resolved rate is always shown so the factor driving the quantity is visible. Use the lb↔oz toggle for sub-ounce bait labels; the headline keeps an ounce readout in its caption.

Bags round up, leftover is honest. You buy whole bags, so the bag count is rounded up and we show the leftover (bags × bag size − product) rather than hiding it. The optional waste buffer inflates only the purchase basis — the headline stays the true amount you actually apply.

Formula: product_lb = (area_sqft / 1,000) × rate_lb_per_1,000 ; bags = ceil(product × (1 + waste%) / bag_lb)

See Sources below