Mail tools
Small, free calculators that answer a question with a number instead of a paragraph. They run entirely in your browser, they need no account, and they compute from the same pricing and delivery logic the product itself bills and ships against — so what you see here is what an order would actually do.
Certified Mail cost calculator
Work out what a Certified Mail letter costs: the USPS postage and fees you pay either way, and the all-in price to have it printed and mailed for you. Updates as you change pages, color, and return receipt.
Mail delivery date estimator
Estimate when a letter will arrive: pick a mail class and see the print-run cutoff, the USPS handoff day, and the earliest and latest expected delivery dates in business days.
Delivery window comparison
See when First-Class, Certified, Certified with Return Receipt, and Priority Mail would each arrive if sent today, side by side — and whether each one makes a deadline you enter.
Certified vs. Registered Mail chooser
Answer two questions to find out whether a piece needs Certified Mail (proof of mailing and delivery) or Registered Mail (USPS's insured, high-security service for valuables) — with a real Certified price if that is the answer.
Looking for the explanation rather than the number? Start with the mail guides or the mail glossary.