Termiticide Concentrate Yield Calculator

The headline is one honest division: a bottle holds a fixed number of fluid ounces, and your dilution rate says how many ounces go into each finished gallon — so the gallons a bottle makes is just bottle ÷ rate. Everything else builds on that.

finished gal / bottle = bottle_floz / rate_floz_per_gal      (78 / 0.8 = 97.5)
finished gal / case   = finished gal/bottle × bottles_per_case

trench rule (label):  gallons = (LF / 10) × 4 × depth_ft     (180/10 × 4 = 72 gal)
coverage (inverted):  LF = (finished gal / (4 × depth_ft)) × 10

for a job (perimeter): job_gal   = (job_LF / 10) × 4 × depth_ft + piers × 2
                       bottles   = ceil(job_gal / finished gal/bottle)
                       cases     = ceil(bottles / bottles_per_case)
                       leftover  = bottles × gal/bottle − job_gal  (never below 0)

The trench rate — 4 gallons per 10 linear feet per foot of depth (0.4 gal/LF/ft) — and the ~2 gal/pier allowance are confirmed from PCT Online's published trench method (its own worked example: 180 ÷ 10 × 4 = 72 gal). Bottles and cases always round up — you can't buy a fraction of a bottle.

The dilution rate is provisional, not gospel. The seed table — 0.06 % ≈ 0.8, 0.09 % ≈ 1.2, 0.125 % ≈ 1.6 fl oz/gal — is a market-standard illustrative default (DIY Pest Control, Tierra Supply), not a label-verified constant. It is fully editable: change the rate to match the EPA-registered label on the bottle in your hand. The same arithmetic serves fipronil (Termidor, Taurus) and bifenthrin (Bifen I/T) — no brand is baked in. "fl oz" here means US fluid ounces (volume), and "gal" means US gallons (128 fl oz), not weight ounces or imperial gallons.

Liquid soil work is not the only line on a termite job. Sill plates, joists and other bare wood exposed during the same visit are sized separately by the borate wood treatment coverage calculator, which works from board surface area rather than trench feet. When the bottles and cases are settled, the page where that chemical cost becomes a bid takes it from there, and pricing the warranty that follows the treatment is the last rung of the same job.