Contact

Found a wrong figure, a broken tool, or a holiday we have missed? Have an idea for a calculator you wish existed? We read every message.

Email: hello@calcoak.com

What helps us fix things faster

• The name of the tool and the page URL.
• The inputs you entered and the result you expected.
• Your browser and device, if the problem looks like a display or layout issue.

Suggesting a tool

Tell us the question you were trying to answer rather than the tool you imagine. "I need to know which day a parcel will arrive if it ships Friday" is much more useful to us than "add a date calculator", because it tells us which details matter.

We usually reply within a few working days. We do not offer paid support or custom development.