USPS Cubic Rate Calculator

USPS Cubic pricing can be significantly cheaper for small, heavy items (up to 20lb). Check if your package qualifies and identify its cubic tier.

Package Specs

Shipping Zone

Length

Width

Height

Actual Weight (LB)

USPS Cubic Tier

Tier 2 (0.20)

StatusEligible

Total Volume0.185 ft³

Formula Applied

(L x W x H) / 1728 = 0.1852 ft³

Verified against official carrier fee schedules (2026-06-19)

$8.50

Price Class

Commercial Plus