Epoxy Floor Coating Calculator

This calculator uses the same coverage math as standard coating specs: it starts from the theoretical constant of 1604 sq ft per gallon at 1 mil dry film thickness, then divides by your desired coat thickness in mils to get coverage per gallon at that thickness — a thicker desired coat means fewer square feet covered per gallon, since the same volume of epoxy is being spread over less area. Gallons needed per coat is floor area divided by that adjusted coverage, and total product multiplies by your number of coats. Because epoxy is a two-part system that only cures when resin (Part A) and hardener (Part B) react together in a fixed ratio, the calculator splits total product according to your specified mix ratio: a "2:1" ratio means Part A is 2/(2+1) of the total volume and Part B is 1/(2+1).

Kit count assumes a standard 1.5-gallon mixed kit size and rounds up, since epoxy is virtually always sold pre-proportioned rather than measured loose. One important thing this calculator does not model: pot life, the working window after mixing before the epoxy begins to gel, is collected as an input but only shown informationally — it does not affect how the calculator batches material, so on large floors you still need to plan your own pour sequence to use each mixed batch within its pot life before it kicks. Also note that coverage assumes a smooth, properly primed and prepped substrate; porous or rough concrete (especially without a prior primer coat) will consume noticeably more material than the theoretical rate suggests, so budget a buffer kit or two on textured floors.