Package Girth Calculator (Length + Girth)
Calculate package girth and combined Length + Girth against carrier parcel thresholds.
Live Calculation Results
Length + Girth
Length: 36.00 in · Girth: 88.00 in
- Length (longest side)
- 36.00 in
- Girth 2 × (W + H)
- 88.00 in
- Length + Girth
- 124.00 in
- Length + Girth threshold
- 130.0 in6.0 in under limit
What this means
- Longest side (length): 36.00 in.
- Girth around cross-section: 2 × (24.00 + 20.00) = 88.00 in.
- Combined length plus girth: 36.00 + 88.00 = 124.00 in.
- Within the selected limit: length + girth is 124.00 in vs 130.0 in (UPS & FedEx Large Package / Oversize Surcharge threshold (130 in L+G)). Margin: 6.0 in under limit. Example service limit — verify current carrier rules.
- Carrier thresholds and measurement rules vary. Always confirm whether your service measures outermost protrusions and whether dimensions are rounded up to the nearest whole unit.
| Measurement | Value | Formula / Basis |
|---|---|---|
| Length | 36.00 in | Longest package dimension |
| Width | 24.00 in | Second longest dimension |
| Height | 20.00 in | Shortest dimension |
| Girth | 88.00 in | 2 × (Width + Height) |
| Length + Girth | 124.00 in | Length + 2 × (Width + Height) |
Assumptions used
- Length is designated as the largest single dimension regardless of package orientation.
- Girth is measured as the distance around the perimeter perpendicular to length: 2 × (width + height).
- Carrier rounding rules (such as rounding fractions up to whole inches) are not applied automatically unless entered directly.
Calculate dimensional weight for this package →Calculate cubic volume →
Planning Notice & Scope Boundary
Carrier oversize thresholds and surcharge amounts vary. Confirm with your parcel carrier tariff.
Formula & Calculation Methodology
Girth = 2 × (Width + Height). Length + Girth = Longest Dimension + 2 × (Width + Height).
Length + Girth = Length + 2 * (Width + Height)| Variable | Definition & Basis |
|---|---|
| Length | Longest side of the box |
| Girth | Perimeter around the cross-section perpendicular to length |
Worked Example: Oversize Parcel Surcharge Check
A carton measures 42 × 28 × 22 inches.
Input Parameters
- Carton Dimensions42 × 28 × 22 inches
- Carrier Limit130 inches (Large Package threshold)
Step-by-Step Calculation Breakdown
- 1Identify longest side (Length): 42 inches.
- 2Calculate girth: 2 × (28 + 22) = 2 × 50 = 100 inches.
- 3Calculate Length + Girth: 42 + 100 = 142 inches.
- 4Compare against 130 inch limit: 142 > 130 inches (exceeds limit by 12 inches).
Assumptions Used
- Length is automatically identified as the longest physical dimension.
- Girth measures distance around the perimeter of the other two dimensions.
Important Limitations
- Carriers often round up fractional dimensions to the nearest whole inch before calculating girth.
Authoritative Standards & Sources
Standard published commercial daily divisor is 139 in³/lb; retail counter rates commonly publish 166 in³/lb. Metric international courier divisor is 5,000 cm³/kg.
Dimension and weight rounding policy for dimensional weight ↗
FedEx rounds each package dimension up to the next whole inch before calculating volume. Final billable weight is rounded up to the next whole pound.
Frequently Asked Questions
How do you measure girth for shipping?
Identify the longest side as Length. For the remaining two sides (Width and Height), add them together and multiply by 2: Girth = 2 × (Width + Height).
What is the maximum Length + Girth allowed by UPS and FedEx?
Standard maximum size is 165 inches in Length + Girth combined. Packages between 130 and 165 inches incur Large Package or Oversize surcharges, while packages over 165 inches are typically rejected from small-package networks.
What to Calculate Next
Freight planning connects sequentially from package dimensions to freight class, pallets, and full equipment: