Email us
For calculator feedback, corrections, or new tool requests, email [email protected].
Contact
Contact C8Calc
Use this page for calculator corrections, layout feedback, missing package sizes, unit issues, formula questions, new tool ideas, or email us at [email protected].
Report a calculator issue
Include the calculator page, unit system, input values, result shown, and the result you expected. Screenshots are helpful for layout, formula-process, unit-switching, and package-yield issues.
Request a new calculator
Describe the trade or project, the measurements users need to enter, the formula or rule you expect, and any common units or package sizes that should be supported.
Suggest package or retail options
Tell us the product type, package size, coverage or yield printed on the label, and whether the calculator should support manual package input, ready-mix rules, or bulk material ordering.