If you know how to measure a box correctly, it can be crucial for your package preparations, shipping efforts, and selection of proper packaging types for your product. Girth is one of the most confusing concepts regarding measurement. While length, width, height are easy to understand, girth does not refer to just a box side – it actually means the perimeter of the box at its largest cross-section.
If you want to send something or to develop custom packaging for it, you should learn how to calculate girth. In the subsequent sections of this article, you will see how to calculate girth correctly and avoid common mistakes.
What Is the Girth of a Box or Package?
Girth for a rectangular box is the measurement around the sides that do not include the length. In other words, if one thinks of wrapping a measuring tape around the width and height, then it would give the proper girth value.
For a standard rectangular package, the formula is:
Girth = 2 × (Width + Height)
For example, if a box is 20 inches long, 12 inches wide, and 8 inches high:
- Width = 12 inches
- Height = 8 inches
- Girth = 2 × (12 + 8)
- Girth = 40 inches
Length is an independent measurement. Carriers sometimes want the length as well as the girth in order to calculate the size of a package. Consequently, measurements must be precise. Carrier rules can change based on the service selected.
How to Measure the Girth of a Box
Measuring box girth is straightforward when you have a standard rectangular package. Follow these steps:
Step 1: Identify the Length
Place the box on a flat surface and identify its longest side.
For example:
Length = 24 inches
The longest dimension is treated as the length and is not included directly in the girth calculation.
Step 2: Measure the Width
Measure the shorter horizontal side of the box.
For example:
Width = 12 inches
Measure from one outside edge to the opposite outside edge.
Step 3: Measure the Height
Measure from the bottom of the package to the top.
For example:
Height = 10 inches
Use the outside dimensions when determining the size of a finished shipping package.
Step 4: Apply the Girth Formula
Now add the width and height together and multiply the result by two.
Girth = 2 × (Width + Height)
Using our example:
Girth = 2 × (12 + 10)
Girth = 44 inches
Step 5: Record the Complete Dimensions
Your package measurements would be:
24 × 12 × 10 inches
And the girth would be:
44 inches
Writing down all four measurements can make it easier to communicate your packaging requirements to a printer, packaging supplier, or shipping provider.
How to Measure the Girth of a Package
When measuring a package instead of an empty box, the process is pretty much the same with the key difference in the fact an already finished package must be measured in the condition it will actually be shipped in.
Follow these practical tips:
- Measure the outside of the completed package.
- Include the packaging material that changes its external dimensions.
- Make sure the box is properly closed before measuring.
- Measure bulging or uneven areas at their widest point.
- Use the same unit of measurement throughout your calculation.
- Record length, width, height, and girth separately.
When measuring irregular packages, be prepared that it may take extra calculations since standard rectangular measurements do not apply here. Thus, if you are not sure about the measuring technique used for irregular packaging, consult with the carrier you use.
What Is the Formula for Box Girth?
The standard formula for a rectangular box is:
Girth = 2 × (Width + Height)
Another way to write the same formula is:
Girth = 2 × Width + 2 × Height
Remember that length is not included in the girth formula.
For example, consider a box measuring:
- Length: 30 inches
- Width: 14 inches
- Height: 8 inches
Calculation:
Girth = 2 × (14 + 8)
Girth = 2 × 22
Girth = 44 inches
Therefore, the box has a girth of 44 inches.
The combined length + girth would be 74 inches. Some shipping services use a combined length-and-girth measurement when applying size rules or surcharges, although exact limits vary by carrier and service.
Example of How to Calculate Package Girth
Let’s look at another practical example.
Suppose you have a product package measuring:
- Length: 18 inches
- Width: 10 inches
- Height: 6 inches
First, add the width and height:
10 + 6 = 16 inches
Then multiply by two:
16 × 2 = 32 inches
So:
Package Girth = 32 inches
The complete package size is 18 × 10 × 6 inches, and its length plus girth is 50 inches.
These calculations can be useful when comparing packaging options or checking whether a particular package falls within a carrier’s size requirements.
Box Girth vs. Package Girth: Is There a Difference?
One can see the terms ‘box girth’ and ‘package girth’ basically refer to the same measurement as applied to a rectangular box-shaped package.
The terminology may differ depending on the context:
- Box girth usually refers to the girth of a cardboard or rigid box.
- Package girth is a broader term that can refer to a completed parcel.
- Shipping girth is often used when discussing carrier size requirements.
- Length + girth combines the package’s longest dimension with its calculated girth.
The important thing here is understanding what dimensions the shipping company expects from the client.
Why Is Package Girth Important for Shipping?
The size of a package is an important factor when handling shipment and pricing orders. Besides actual weight of the items being shipped, shipping companies take into consideration the dimensions of the package, especially if it’s fairly large
Accurate measurements can help you:
- Determine whether a package meets size requirements.
- Avoid providing incorrect dimensions.
- Compare different packaging sizes.
- Plan product packaging more efficiently.
- Estimate shipping requirements more accurately.
- Reduce unnecessary empty space inside a box.
Dimensional weight impacts the shipping price for some packages. Therefore length, width, and height must be measured carefully rather than estimated.
Common Mistakes When Measuring Box Girth
Even a simple formula can produce an incorrect result if the measurements are taken incorrectly.
Here are some common mistakes to avoid:
1. Including Length in the Girth Formula
Length is measured separately. Do not add it to width and height when calculating girth.
2. Measuring the Inside Instead of the Outside
If you are checking shipping dimensions, the relevant measurement may be the exterior dimensions of the finished package.
3. Measuring Before the Package Is Properly Closed
Flaps, tape, protective materials, or bulging contents can change the final exterior dimensions.
4. Mixing Measurement Units
Do not combine inches and centimeters in the same calculation. Convert all measurements to the same unit first.
5. Assuming Every Carrier Uses the Same Limits
Shipping rules can vary by carrier, service, package type, and destination. Always verify the current requirements before sending an oversized package.
How Accurate Box Measurements Help With Custom Packaging
Accurate measurements of box dimensions come in handy while ordering boxes that are designed for a given product. If the box is small, certain damage to the product can occur. A large box may incur more costs in terms of materials, storage, and shipping.
Businesses looking for a custom box printing service in California will need accurate product sizes for effective communication to their packaging company. In California PrintLocker provides the needed custom boxes that meet different sizes and printing needs.
If you are based in Southern California, finding a reliable Custom box printing service in Los Angeles will simplify communication about required box dimensions, materials, printing, and finishing.
If a project has a quick turnaround, a Same day custom box printing service in Los Angeles and nearby areas is worth considering based on the type of product, number of pieces, artwork, and requirements of the production process. PrintLocker offers that same-day services are available for many products, with rush options handled based on the project.
The proper dimension can be helpful not only in making individual boxes. Companies creating branding materials for shipment, retail packaging, and product display can work with Custom Packaging printing service in Los Angeles to know the best dimensions, structures, materials, and finish for their products.
Companies providing services in the whole state may use the services of Custom packaging printing service in California to convert product measurements into usable specifications of packaging.
It is quite easy to measure the girth of a box or package if you know which dimensions to use. It is important to establish which side of the box is the longest side since this will be dubbed the length. The girth can then be calculated using the formula of 2 × (width + height) after measuring the girth of the box. This basic information can be helpful in ensuring that the correct products are being shipped off as well as ordering packaging that is suitable for the size of the products being shipped off.
In cases of packages with weird shapes or packages having mandatory packing requirements, make sure to check with your shipping carrier whether you are putting the right method of measuring into practice. Once the measurements have been obtained, they can also serve as a basis for crafting customized printed packaging that would correspond with the brand of the product.
❓ FAQs
Q1: How do you measure the girth of a box?
Measure the width and height, then use the formula: Girth = 2 × (Width + Height).
Q2: How do you calculate the girth of a package?
Add the package width and height together and multiply the result by 2.
Q3: Does box girth include the length?
No. Girth is calculated using the width and height. Length is measured separately.
Q4: What is the formula for package girth?
The formula is Girth = 2 × (Width + Height) for a standard rectangular package.
Q5: Why is package girth important for shipping?
Package girth helps determine whether a shipment meets a carrier's size and dimensional requirements.
