Calculator · Free · Client-side only
USPS Business-Day Estimator
Estimate business-day transit for USPS Priority Mail and First-Class Package based on zone tables.
What this assumes
- Estimates use published USPS zone transit tables, not live network scans.
- Weather, customs (if applicable), and peak season can add days.
- Saturday delivery may apply to some Priority Mail destinations.
Important
This is not an official USPS tool. For time-sensitive mail, buy Priority Mail Express or confirm at a post office.
Common questions
Why business days?
USPS transit commitments for these services are usually stated in business days (Mon–Fri), excluding most federal holidays.