Calculate a payment due date using calendar-day terms.
Use the example inputs or enter your own values.
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Adds the stated number of calendar days to the invoice date using UTC date arithmetic.
Enter invoice date, payment terms (calendar days). Update the result, inspect it, then copy or download the output. Reset restores the example inputs so you can start a new calculation.
Example inputs: Invoice date: 2026-01-01 · Payment terms (calendar days): 30.
This does not account for business days, holidays or contract-specific payment rules.
The tool does not connect to your website, change your hosting or install anything in WordPress. Any output must be applied separately in the intended environment.
No. This tool works in a modern browser with JavaScript enabled. Your inputs are not submitted to a server by the tool.
Use Copy for the textual result or Download for a local file. Image tools download a generated image when one is available.
No. It produces a result for you to review. Production changes remain a separate step.
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