8 × 6 × 4 box
volume & shipping weight
An 8 × 6 × 4 inch box holds 192 cubic inches — 0.111 cubic feet, or 3.15 liters. In metric it measures 20.3 × 15.2 × 10.2 cm.
What an 8x6x4 box bills at
Carriers charge the greater of actual weight and dimensional weight. For this box: 192 in³ ÷ 139 = 1.38 → 2 lb at FedEx, UPS Daily Rates and DHL; ÷ 166 = 1.16 → 2 lb at UPS Retail. If what’s inside weighs more than that, you pay the actual weight.
| Carrier / rates | Divisor | DIM weight | Billed at least | Note |
|---|---|---|---|---|
| FedEx (US) | 139 in³/lb | 2 lb | 2 lb | Fractions of an inch round up; weight rounds up to the next lb. |
| UPS Daily Rates | 139 in³/lb | 2 lb | 2 lb | Account rates. Dimensions round up to whole inches. |
| UPS Retail Rates | 166 in³/lb | 2 lb | 2 lb | UPS Store / counter, domestic. |
| USPS Priority Mail & Ground Advantage | 139 in³/lb | — | — | Not applied: 192 in³ is not over 1 ft³ (1,728 in³). Priced on actual weight. |
| DHL Express (from the US) | 139 in³/lb | 2 lb | 2 lb | Rated in whole-lb steps. |
| International, rated in kg | 5,000 cm³/kg | 1 kg | 1 kg | For rates quoted in kg (e.g. shipping from Europe or Asia): 21 × 16 × 11 cm after rounding each side up to the cm. From the US, FedEx and UPS use 139. |
“Billed at least” includes any minimum billable weight the box’s size triggers. Actual weight still wins if it’s higher.
Rules verified 22 Sep 2026 · sources: FedEx Service Guide 2026 · UPS 2026 Rate and Service Guide (Daily Rates) · UPS 2026 Rate and Service Guide (Retail Rates) · USPS DMM 223 (Priority Mail: DIM weight, cubic, nonstandard fees) · DHL Express US Service & Rate Guide 2026
Size checks for 8 × 6 × 4 in
Longest side 8 in, girth 2 × (6 + 4) = 20 in, so length + girth is 28 in. Here’s how that sits against each carrier’s lines (size only — weight rules are separate).
- UPS & FedEx Additional Handling (size)Clear. Longest side 8 in: 40 in under the 48 in line. Second-longest 6 in: 24 in under the 30 in line. Length + girth 28 in: 77 in under the 105 in line. Volume: 10,176 in³ under the 10,368 in³ line.
- UPS Large Package / FedEx OversizeClear. Length + girth 28 in: 102 in under the 130 in line. Volume: 17,088 in³ under the 17,280 in³ line. Longest side: 88 in under the 96 in line.
- UPS & FedEx maximum sizeWithin the 108 in length and 165 in length + girth maximums.
- USPS size limitLength + girth 28 in is within USPS’s 108 in limit.
- USPS nonstandard feesNone for this size: longest side 8 in is not over 22 in and 192 in³ is not over 2 ft³ (3,456 in³).
- USPS Cubic pricing (commercial)Priority Mail Cubic tier 0.20 and Ground Advantage Cubic tier 0.20 (192 in³ ÷ 1,728 = 0.111 ft³). Priced by tier and zone, up to 20 lb. Cubic calculator →
- DHL Express Oversize PieceClear: longest side 8 in (line: 40 in), second-longest 6 in (line: 32 in).
Rules verified 22 Sep 2026 · sources: FedEx Service Guide 2026 · UPS 2026 Rate and Service Guide (Daily Rates) · USPS DMM 101 (maximum size and weight) · USPS DMM 223 (Priority Mail: DIM weight, cubic, nonstandard fees) · USPS DMM 283 (Ground Advantage — Commercial, cubic) · DHL Express US Service & Rate Guide 2026
Trim one inch
At this size, trimming one inch off any side doesn’t change the rounded-up DIM weight at 139.
| Change | in³ | DIM ÷139 | Saves | UPS Retail ÷166 | USPS |
|---|---|---|---|---|---|
| Length 8 → 7 in | 168 | 2 lb | no change | 2 lb | none (under 1 ft³) |
| Width 6 → 5 in | 160 | 2 lb | no change | 1 lb | none (under 1 ft³) |
| Height 4 → 3 in | 144 | 2 lb | no change | 1 lb | none (under 1 ft³) |
On a 48 × 40 pallet
40 per layer (8 × 5, 4 in side up), 15 layers in 60 in of stack height = 600 boxes, 66.7 ft³ in all. The layer covers 100% of the deck.
Assumes a simple column stack, box upright, no overhang, 60 in of boxes on the deck. Interlocked or mixed patterns can fit more; check your carrier’s or warehouse’s height limit. Try mixed patterns, other pallets and heights →
Size tier
Large standard at the lightest. Amazon sets the tier on the greater of unit weight and dimensional weight — here 192 ÷ 139 = 1.38 lb. It’s within 18 × 14 × 8 in and the DIM weight (1.38 lb) is under 20 lb.
Rules verified 22 Sep 2026 · sources: Amazon Seller Central — Product size tiers
Heavier contents can move it up a tier — check with your product’s weight. See the FBA dimensional weight guide for 2026 fees.
An item this size fits inside the USPS Medium Flat Rate Box 1 (11 × 8 1/2 × 5 1/2 in inside), in some orientation. Flat Rate is priced by the box, not by weight or dimensional weight, up to 70 lb. It also fits: Large Flat Rate Box.