How do you calculate coating solids content?

Divide the solids weight by the total mixed weight and multiply by 100. The example's 125 lb of solids in a 250 lb batch is 50% by weight.

How much thinner brings a batch to target?

Solids weight divided by the target share, minus current total weight. At the defaults that is 125 ÷ 0.48 − 250, or 10.42 lb of thinner.

What if the mix is below target solids?

Thinner cannot fix it. Removal is impractical, so the correction is base addition or blending with a rich batch; the negative correction row names the direction.

Is this weight solids or volume solids?

Weight. The mix room's scale speaks pounds. Film-build conversions need the data sheet's volume solids, a different and usually lower number.

Finishing calculator

Coating Solids Calculator

Grade a batch's solids content and get the correction in pounds. Enter solids weight, batch weight, the target and any proposed thinner addition.

What this calculator does

Grade a mix's solids content and compute the thinner addition that lands an over-target batch exactly on specification.

Formula used

Solids content = solids weight ÷ total mixed weight × 100
Shortfall to target = target solids − measured solids (negative means above)
Solids after thinning = solids weight ÷ (total weight + thinner) × 100
Thinner to land on target = solids weight ÷ target share − total weight

Inputs explained

Solids Weight in the Mix: Nonvolatile pounds in the batch, from formulation or a bake-off.
Total Mixed Coating Weight: Whole batch on the scale before any further thinning.
Target Solids: Specification solids by weight for the ready-to-apply mix.
Thinner Being Added: Proposed or made thinner addition, in pounds; zero to grade as-is.

How to use the result

Best suited to grading a batch before release to the line, sizing the thinner to hit target, previewing an addition before committing solvent.
Weight solids and volume solids differ; film-build pages use volume solids. A below-target batch needs base addition, which the page flags but does not size. Viscosity tracks solids loosely; the cup check stands beside this arithmetic.

Current U.S. benchmarks

Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
The producer price index for industrial chemicals stands at 336.006 (BLS, Aug 2026), up 13.3% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate coating solids content? Divide the solids weight by the total mixed weight and multiply by 100. The example's 125 lb of solids in a 250 lb batch is 50% by weight.
How much thinner brings a batch to target? Solids weight divided by the target share, minus current total weight. At the defaults that is 125 ÷ 0.48 − 250, or 10.42 lb of thinner.
What if the mix is below target solids? Thinner cannot fix it. Removal is impractical, so the correction is base addition or blending with a rich batch; the negative correction row names the direction.
Is this weight solids or volume solids? Weight. The mix room's scale speaks pounds. Film-build conversions need the data sheet's volume solids, a different and usually lower number.

Last reviewed 2026-10-01.