Volumetric Weight Calculator

Q: What carrier divisor should I use?

The most common divisor is 5,000 for metric (cm/kg) and 139 for imperial (in/lbs). However, each carrier sets its own divisor. DHL, FedEx, and UPS all use 5,000 for metric shipments. Some ocean freight and ground carriers use 6,000 or higher. Always check your carrier's rate card or contract to find the exact number.

Q: Why is my volumetric weight higher than my actual weight?

This happens when your package is large but light . For example, a big box of pillows weighs very little on a scale but takes up a lot of space on a truck. Carriers charge based on the higher weight, so you pay for the space your package uses. To lower your volumetric weight, try using a smaller box that fits your items more tightly.

Q: Can I use this calculator for international shipping?

Yes. Volumetric weight works the same way for both domestic and international shipments. Just make sure you use the correct divisor for your carrier and route. Some carriers use different divisors for air freight versus ground shipping, even on international routes.

Q: What units should I measure my package in?

Use centimeters and kilograms if your carrier quotes in metric, or inches and pounds if they quote in imperial. The calculator lets you switch between both. Make sure your dimensions and divisor match the same unit system, or your results will be wrong.

Q: Do I measure the inside or outside of the box?

Always measure the outside of the box. Carriers charge based on the space the package takes up, not the space inside it. Include any bulges, tape, or uneven sides in your measurements.

Q: How do I measure a tube-shaped package?

Measure the length from one end to the other. Then measure the diameter , which is the distance straight across the round end. Enter both values into the calculator after selecting the "Tube" package type.

Q: What if my package is not a perfect box or tube?

Measure the longest, widest, and tallest points of the package. Carriers treat irregular shapes as if they were a box that fits around the entire item. Use those outer measurements in the calculator.

Q: Does the number of packages change the billable weight per package?

No. The billable weight per package stays the same . The calculator multiplies it by the number of packages to give you a total. Each package is compared on its own — volumetric weight versus actual weight — and the higher one is used for that package.

Volumetric Weight Calculator

Updated May 26, 2026 By Jehan Wadia

Introduction

Volumetric weight is the amount of space a package takes up during shipping. Carriers charge you based on whichever is higher: the actual weight or the volumetric weight. This is because a large, light box still takes up room on a truck or plane. Our free volumetric weight calculator helps you find the billable weight of your shipment in seconds. Just enter your package dimensions, actual weight, and carrier divisor. The tool works for both box and tube shapes, supports metric and imperial units, and handles multiple packages at once. Use it to avoid surprise shipping costs and plan your logistics with confidence.

How to Use Our Volumetric Weight Calculator

Enter your package details below to find the volumetric weight, actual weight, and billable weight. The calculator compares both weights and shows which one your carrier will charge you for.

Package Type: Pick "Box" if your package is rectangular or "Tube" if it is round like a cylinder.

Unit System: Choose "Metric" to use centimeters and kilograms, or "Imperial" to use inches and pounds.

Length: Enter the longest side of your package.

Width: Enter the second longest side of your box. This field only shows for box-shaped packages.

Height: Enter the shortest side of your box. This field only shows for box-shaped packages.

Diameter: Enter the distance across the round end of your tube. This field only shows for tube-shaped packages.

Actual Weight: Enter how much your package weighs on a scale.

Carrier Divisor: Enter the divisor your shipping carrier uses. Most carriers use 5,000 for metric or 139 for imperial. Check with your carrier if you are not sure.

Number of Packages: Enter how many identical packages you are shipping. The calculator will multiply the results for you.

Click Calculate to see your results. Click Reset to clear all fields and start over.

What Is Volumetric Weight?

Volumetric weight (also called dimensional weight or DIM weight) is a way shipping carriers figure out how much to charge you based on the size of your package, not just how heavy it is. A big, light box takes up a lot of space on a truck or plane, so carriers use volumetric weight to make sure they get paid fairly for that space. Knowing the volume of your package is the first step — you can use our Volume Calculator to find it for any shape.

How Is Volumetric Weight Calculated?

To find the volumetric weight of a box, you multiply the length × width × height and then divide by a number called the divisor. For metric measurements (centimeters and kilograms), the most common divisor is 5,000. For imperial measurements (inches and pounds), it is usually 139. Different carriers like DHL, FedEx, and UPS may use different divisors, so always check with your carrier first. If you need to calculate the volume of a cylindrical tube specifically, our Cylinder Volume Calculator can help with that step.

What Is Billable Weight?

Carriers compare your package's actual weight on a scale to its volumetric weight. Whichever number is higher becomes the billable weight — that is the weight you pay for. This means even a very light package can cost more to ship if it is large in size. If you need to figure out the total area of your packaging materials, our Surface Area Calculator or Square Footage Calculator can be useful for estimating material costs.

Why Does Volumetric Weight Matter?

Understanding volumetric weight helps you save money on shipping. If you can use a smaller box or reduce empty space with better packaging, you lower the volumetric weight and may pay less. This is especially important for businesses that ship many packages every day, because small savings per box add up fast. Pairing this calculator with our Lead Time Calculator gives you a fuller picture of your supply chain performance, helping you plan both costs and delivery timelines. For businesses tracking overall profitability, tools like the Margin Calculator and Break Even Calculator can help you factor shipping expenses into your pricing strategy.

Box vs. Tube Packages

Most packages are box-shaped, but some items ship in tubes or cylinders. The math is a little different for tubes — it uses the tube's length and diameter along with pi (π) to find the volume. The calculator above handles both shapes for you automatically. If you are working with rectangular dimensions and need to convert between units, our Cubic Feet Calculator or Cubic Yard Calculator can help. For converting between metric and imperial length measurements, try our Meters to Feet Calculator.

Frequently asked questions

What carrier divisor should I use?

The most common divisor is 5,000 for metric (cm/kg) and 139 for imperial (in/lbs). However, each carrier sets its own divisor. DHL, FedEx, and UPS all use 5,000 for metric shipments. Some ocean freight and ground carriers use 6,000 or higher. Always check your carrier's rate card or contract to find the exact number.

Why is my volumetric weight higher than my actual weight?

This happens when your package is large but light. For example, a big box of pillows weighs very little on a scale but takes up a lot of space on a truck. Carriers charge based on the higher weight, so you pay for the space your package uses. To lower your volumetric weight, try using a smaller box that fits your items more tightly.

Can I use this calculator for international shipping?

Yes. Volumetric weight works the same way for both domestic and international shipments. Just make sure you use the correct divisor for your carrier and route. Some carriers use different divisors for air freight versus ground shipping, even on international routes.

What units should I measure my package in?

Use centimeters and kilograms if your carrier quotes in metric, or inches and pounds if they quote in imperial. The calculator lets you switch between both. Make sure your dimensions and divisor match the same unit system, or your results will be wrong.

Do I measure the inside or outside of the box?

Always measure the outside of the box. Carriers charge based on the space the package takes up, not the space inside it. Include any bulges, tape, or uneven sides in your measurements.

How do I measure a tube-shaped package?

Measure the length from one end to the other. Then measure the diameter, which is the distance straight across the round end. Enter both values into the calculator after selecting the "Tube" package type.

What if my package is not a perfect box or tube?

Measure the longest, widest, and tallest points of the package. Carriers treat irregular shapes as if they were a box that fits around the entire item. Use those outer measurements in the calculator.

Does the number of packages change the billable weight per package?

No. The billable weight per package stays the same. The calculator multiplies it by the number of packages to give you a total. Each package is compared on its own — volumetric weight versus actual weight — and the higher one is used for that package.

Why do carriers use volumetric weight at all?

Trucks and planes have limited space. A large, light package takes up room that could hold heavier items. Volumetric weight makes sure carriers get paid fairly for the space your package uses, not just its weight on a scale.

How can I lower my shipping costs using this calculator?

Try different box sizes in the calculator and see how the volumetric weight changes. Smaller boxes mean lower volumetric weight. Remove extra packing material and empty space. If the volumetric weight drops below the actual weight, you only pay for the actual weight.

Is the divisor the same for air and ground shipping?

Not always. Many carriers use 5,000 for air freight and a higher number like 6,000 for ground shipping in metric. A higher divisor gives a lower volumetric weight. Check your carrier's terms for the exact divisor used on your shipping method.

What does the sensitivity chart show?

The sensitivity chart shows how your volumetric weight changes when you use different divisors. It also plots your actual weight as a flat line so you can quickly see at which divisor the volumetric weight becomes higher or lower than the actual weight. This helps you compare costs across carriers.

Do all carriers use the same volumetric weight formula?

The basic formula is the same: volume divided by a divisor. What changes is the divisor number. For example, DHL, FedEx, and UPS all use 5,000 for metric, but some regional or freight carriers may use 4,000 or 6,000. Always confirm with your specific carrier.

Should I round up my measurements?

Most carriers round each dimension up to the next whole number or half unit. If your box measures 30.3 cm, the carrier may treat it as 31 cm. It is safer to round up when entering your dimensions so you get an accurate estimate of the billable weight.

What is the donut chart in the results?

The donut chart compares your volumetric weight and actual weight side by side. The center shows the billable weight. This gives you a quick visual of which weight is driving your shipping cost.