Seven calculators we use ourselves, for production costing, solution preparation and coating work. Nothing is stored and nothing is sent anywhere: the arithmetic runs in your browser, so the page works offline once loaded.
Most people cost a print by adding up consumables and stop there. The machine and the labour are real costs per unit, and they are usually what decides whether a job is worth taking.
How much stock solution to take, and how much solvent to add, to reach a target concentration and volume. Units cancel, so work in whatever you like provided both concentrations match and both volumes match.
Always add concentrated acid to water, never the reverse. The dilution is exothermic and adding water to acid can boil it back at you.
How much solid to weigh out for a given molarity and volume, with an optional correction for assay purity and for hydrated salts.
For a hydrate, enter the molar mass of the hydrated form as written on the bottle. Dissolve in part of the solvent first, then make up to the mark; volumes are not additive.
Enter the limiting reagent and the stoichiometry, and the calculator works out the theoretical yield and how close you came to it.
Solids content is the only honest way to compare coating prices. Two products at the same price per litre deliver very different amounts of dry film if one is half water.
Two-part systems cure by stoichiometric reaction, so the ratio is chemistry and not a guideline. Excess hardener does not cure harder, it leaves a permanently soft film.
The pot life estimate uses the common rule of thumb that reaction rate roughly doubles per 10 °C. Treat it as a warning, not a specification, and mix in shallow containers to spread the exotherm.
Enter the quantity one component takes in your reference batch, then the two batch sizes. The scale factor applies to every component in the formulation.
Scaling the recipe does not scale the process. Heat transfer, mixing shear and cooling rate all change with vessel size, which is why a formulation that works at a litre can misbehave at fifty.
If a calculator gives a result you believe is wrong, tell us what you entered and what you expected at sales@textinkllc.com. These are working tools and we would rather hear about an error than not.