Inputs
Length 40 cm, width 30 cm, height 50 cm.
Package dimensions · Production
Know the shape.
Show the math.
Calculate a package's longest edge, girth, volume, and length plus girth from your own dimensions. No carrier thresholds or fees are included.
Browser-onlyFixed-point decimalsNo carrier thresholds
Geometry only · fixed-point math
Measure the box you actually have.
Your geometry result will appear here.
Enter all three outside dimensions to see the sorted edges, girth, and volume. No carrier conclusion is produced.
Correct the highlighted fields to continue.
Worked metric example
40 × 30 × 50 cm, shown step by step.
Exact result
Longest edge 50.000000 cm; girth 140.000000 cm; length plus girth 190.000000 cm; volume 60000.000000 cm³.
How to read it
For these dimensions, 50 cm is the longest edge and 190 cm is the geometry result for length plus girth. Compare that number with the current rules for your carrier, service, market, and shipment; the result itself is not an acceptance decision.
A visible method
Every number has a place in the box.
Sort the edges
The longest, second, and shortest values are identified from your input order. Equal values keep their original order.
Wrap the girth
Girth is the perimeter around the second and shortest edges: 2 × (second + shortest).
Keep precision
Inputs stay as decimal strings and the calculation uses fixed-point integers, not display-rounded numbers.
Read this before using the number
Geometry is not a shipping decision.
This tool does not determine a carrier limit, fee, deliverability, or acceptance. Carrier rules vary by service, market, and date; check the relevant source before acting.
Source notes
Formula context, not a threshold table.
Reviewed 2026-08-28
- UPS dimensions and weight guideUsed only to explain the public geometry formula; this tool does not copy a UPS threshold.
- FedEx oversized-item guideShows why package limits vary by carrier, service, market, and shipment.
- NIST metric/SI unitsThe inch conversion uses the exact relation 1 in = 2.54 cm.
FAQ
The assumptions stay in view.
What does length plus girth mean?
It adds the longest package edge to the perimeter around the other two edges: longest + 2 × (second edge + shortest edge).
Does this tell me whether a carrier will accept my package?
No. It is a geometry calculation only. Carrier limits, fees, deliverability, and acceptance depend on a carrier, service, market, and current rule set.
Why are results shown with six decimal places?
The calculation keeps decimal strings as fixed-point integers, then returns a canonical six-place string so the copied formula does not depend on binary floating-point rounding.
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