How Many Stamps Do I Need?
Calculate exact USPS postage costs instantly with our free calculator. Get current 2025 stamp prices, shipping estimates, and save money on domestic & international mail.
USPS Postage Calculator
Calculate exactly how many stamps you need and total postage costs with current USPS rates
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📦 Shipping Details
💡 Quick Shipping Tips
Measure Accurately
Use a kitchen scale for precise weight measurements. Round up to the nearest ounce for safety.
Save Money
Use forever stamps for letters up to 1 oz. They're valid even if rates increase later.
Faster Delivery
Priority Mail Express guarantees overnight delivery to most locations by 10:30 AM or 3 PM.
📊 Compare All USPS Services
Find the best shipping option for your needs and budget
USPS Ground Advantage
Priority Mail
Priority Mail Express
📋 Detailed Comparison
| Feature | Ground Advantage | Priority Mail | Priority Express |
|---|---|---|---|
| Delivery Time | 2-5 business days | 1-3 business days | Overnight |
| Tracking | ✅ Free | ✅ Free | ✅ Free |
| Insurance (included) | Up to $100 | Up to $50 | Up to $100 |
| Free Packaging | ❌ No | ✅ Yes | ✅ Yes |
| Money-back Guarantee | ❌ No | ❌ No | ✅ Yes |
| Weekend Delivery | ❌ No | ❌ No | ✅ Available |
💰 Your Potential Savings
See detailed comparison of all USPS shipping options
📏 Package Size Visualizer
Understand USPS size limits and optimize your packaging
📦 Package Visualization
📐 Size Comparison
📏 Enter Your Dimensions
✅ USPS Requirements
💡 Packaging Tips
💰 Cost Impact
Live USPS Rates
Current postage rates updated in real-time from official USPS APIs
Domestic Rates
Within the United States
International Rates
To Canada & Worldwide
About These Rates
Rates are fetched directly from USPS APIs and updated every 5 minutes
Rates shown for 1 lb package (6" × 4" × 2") from ZIP 90210 to 10001
Standard retail rates before any commercial discounts