Up to 20 lbs
Any weight up to 20 lbs per tier
Dimension-Based
Pricing by cubic size, not weight
1-3 Day Delivery
Fast delivery with tracking
Cubic Tier Requirements
Tier 0.1
≤ 0.1 cubic feet
≤ 172.8 cu in
Tier 0.2
≤ 0.2 cubic feet
≤ 345.6 cu in
Tier 0.3
≤ 0.3 cubic feet
≤ 518.4 cu in
Tier 0.4
≤ 0.4 cubic feet
≤ 691.2 cu in
Tier 0.5
≤ 0.5 cubic feet
≤ 864.0 cu in
Cubic Size Calculation: Length × Width × Height (in inches) ÷ 1,728 = Cubic Feet
Priority Mail Cubic Rates by Zone
All tiers support up to 20 lbs • Effective July 13, 2025
| Cubic Tier | Max Dimensions | Zone 1 0-50 miles |
Zone 2 51-150 miles |
Zone 3 151-300 miles |
Zone 4 301-600 miles |
Zone 5 601-1000 miles |
Zone 6 1001-1400 miles |
Zone 7 1401-1800 miles |
Zone 8 1801+ miles |
Zone 9 Territories |
|---|---|---|---|---|---|---|---|---|---|---|
| Tier 0.1 | 0.1 cu ft (172.8 cu in) |
$8.25 | $8.75 | $10.15 | $12.85 | $15.25 | $17.65 | $19.45 | $20.85 | $22.50 |
| Tier 0.2 | 0.2 cu ft (345.6 cu in) |
$8.75 | $9.35 | $10.85 | $13.75 | $16.35 | $18.95 | $20.95 | $22.55 | $24.85 |
| Tier 0.3 | 0.3 cu ft (518.4 cu in) |
$9.45 | $10.15 | $11.95 | $15.25 | $18.15 | $21.05 | $23.35 | $25.15 | $28.25 |
| Tier 0.4 | 0.4 cu ft (691.2 cu in) |
$10.25 | $11.05 | $13.15 | $16.95 | $20.25 | $23.55 | $26.15 | $28.25 | $32.15 |
| Tier 0.5 | 0.5 cu ft (864.0 cu in) |
$11.15 | $12.05 | $14.45 | $18.75 | $22.45 | $26.15 | $29.05 | $31.45 | $36.25 |
Priority Mail Cubic Advantages
Cost Savings
- Significant savings for dense, heavy packages
- Same rate for any weight up to 20 lbs per tier
- Lower costs than weight-based Priority Mail for heavy items
Service Features
- $100 insurance coverage included
- USPS Tracking included
- 1-3 business day delivery
Best Use Cases for Priority Mail Cubic
Books & Publications
Heavy but compact items
Tools & Hardware
Dense metal items
Exercise Equipment
Small but heavy items
Important Notes
- • ParcelPath automatically compares Priority Mail Cubic against weight-based Priority Mail to ensure you get the lowest rate
- • Maximum weight limit is 20 lbs per package for all cubic tiers
- • Package dimensions determine the cubic tier - weight does not affect pricing within tier limits
- • Cubic size is calculated as: Length × Width × Height (inches) ÷ 1,728
- • All rates include $100 of insurance coverage and USPS Tracking