Calculate due dates for replies, forms, and service windows. This is a free calculator built for quick repeat checks on mobile and desktop.
This tool helps when a ticket, complaint, form, or service promise has to be answered by a specific due date and the counting rule matters. In the UK, notice dates, leave dates, and business-day deadlines often depend on whether weekends count, whether bank holidays are excluded, and whether the contract sets a rule that is more specific than the default assumption.
The biggest error with SLAs is using working-day counting for a target that is actually written in calendar days. If the date is contract-sensitive, check whether the relevant rule is calendar days, working days, or a fixed number of weeks, because those three approaches can land on different dates.
UK guidance on this page is a practical planning layer, not legal advice. If the answer affects pay, dismissal, leave entitlement, or a formal workplace process, verify it against the contract, policy, collective rule, or official guidance that applies to your role.