TOOL
Mail delivery date estimator
By Justin Winter · Updated August 28, 2026
Pick a mail class and this estimates when a letter sent now should arrive: the print run it can still make, the USPS handoff the next business day, and the earliest and latest expected delivery dates counted in business days. It is an estimate against USPS service standards — no class except Priority Mail Express carries a guaranteed date.
Most delivery questions are really deadline questions: something has to be in someone's hands by a date, and you need to know whether posting it today clears it. The estimate below counts the same three steps a real order goes through — print run, USPS handoff, transit — rather than quoting a range and leaving you to do the calendar arithmetic.
Estimating from your clock…
This is an estimate, not a guarantee. It counts business days and excludes weekends, but it does not model federal holidays, weather, or local delivery backlogs — all of which push real mail later. USPS publishes service standards for First-Class and Priority; only Priority Mail Express carries a money-back delivery date, and paperplane does not offer it.
The three steps it counts
- The print run. Orders paid before 2:00 PM Eastern on a business day join that day's run. Later or weekend orders join the next business day's.
- The USPS handoff. Printed mail goes to USPS the next business day after the run — this is the day the postmark date comes from.
- Transit. Counted in business days from the handoff: 3–5 for First-Class and Certified, 1–3 for Priority.
What it deliberately does not model
Federal holidays, severe weather, and local delivery backlogs all push mail later, and none of them are predictable enough to put a date on. The window here is the ordinary case. If a legal deadline is close enough that a single day decides it, send earlier or send Priority, and use a service that produces a proof of mailing so the send date itself is documented — for many deadlines the date you mailed is the date that counts.
More on the mechanics: how long mail takes by class, the full send-to-delivery timeline, or what a service standard actually commits USPS to.
Related guides
Common questions
Are these dates guaranteed?
No. First-Class, Certified, and Priority Mail all travel against USPS service standards, which are published expectations rather than promises. The only USPS product with a money-back guaranteed delivery date is Priority Mail Express, which paperplane does not offer.
Does the estimate account for holidays?
It excludes weekends but not federal holidays. A holiday inside the window pushes the real arrival one business day later per holiday, so treat a window that spans one as optimistic by that much.
Why is there a cutoff time?
Letters are printed in a daily run that closes at 2:00 PM Eastern on business days. An order paid before the cutoff joins that day’s run; after it, the next business day’s. The printed mail is then handed to USPS the following business day, which is where the transit clock starts.
Does Certified Mail take longer than a normal letter?
No. Certified is an extra service on top of First-Class postage, so it moves at First-Class speed — 3–5 business days. What it adds is tracking and a delivery record, not time.