Free working-day calculator
Calculate a deadline.
Add or subtract calendar or working days with an editable weekend pattern, explicit UK regional bank-holiday presets and custom closure dates. For counting rules, UK context and worked examples, open the complete tool.
Deadline calculator workspace
Runs locally in your browser
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Guest access includes 3 public-tool runs per rolling 24 hours. Inputs stay on this device.
Official UK bank holiday presets · 2025–2028
Dates come from GOV.UK. Applying a preset replaces the holiday box; you can then edit it for organisation closures or rules. No national calendar is applied unless you choose one. Inspect or download the maintained regional dataset.
Result
Deadline—
Weekday—
Calendar time elapsed—
Deadline summary