USPS Delivery Time Estimator
Estimate how long mail takes between any two U.S. states for First-Class and Priority Mail.
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USPS Mail Tools & Calculators
Plan your mailings with our free tools. Estimate delivery times between states, validate addresses, calculate postage costs, and make smarter mailing decisions.
Showing all 9 free USPS tools and calculators.
USPS Address Validator
Verify and correct U.S. addresses against the official USPS database. Get ZIP+4 codes and standardized formatting.
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USPS Address Validator (Full)
Validate any U.S. address using the official USPS API. Returns standardized address, ZIP+4, and delivery information.
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ZIP Code Validator & City/State Lookup
Check if a ZIP code is valid and see its primary city and state using official USPS data.
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USPS-Style Address Standardizer
Format any address to USPS standards. Converts to all caps, applies abbreviations, and formats ZIP codes—all client-side.
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USPS Tracking Status Explainer
Understand any USPS tracking status. Learn what each update means, common causes, and what to do next.
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ZIP+4 Lookup Tool
Enter a full address to get the 9-digit ZIP+4 code and USPS-standardized format. Powered by official USPS data.
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USPS Mailing Cost Calculator
Get real-time USPS postage rates for domestic and international mail. Compare prices across mail classes.
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Certified Mail Fee Calculator
Calculate total USPS Certified Mail costs including postage, service fees, Return Receipt, and Restricted Delivery options.
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