Convert Shipping Weight from Pounds to Kilograms

Direct answer

Multiply the package weight in pounds by 0.45359237.

For example, a 12.5-pound parcel converts as follows:

Rounded to two decimal places, this is 5.67 kilograms.

Enter another package value into the Pounds to Kilograms Converter.

Actual weight, dimensional weight, and billed weight

Shipping documents can use several different weight concepts. A simple unit conversion should not be confused with the carrier's billing calculation.

Actual weight

Actual weight is the physical weight measured on a scale.

Dimensional weight

Dimensional weight is calculated from package dimensions according to a carrier's formula. It accounts for the space occupied by a relatively light but bulky package.

Billed weight

Billed weight may be based on the greater of actual weight and dimensional weight, followed by the carrier's rounding rules.

Converting pounds to kilograms changes only the unit of a known weight. It does not determine which weight the carrier will charge.

Common shipping weights in kilograms

The table uses rounded kilogram values. Carrier systems may apply their own rounding after conversion.

Example: convert a 5-pound parcel

A general product listing might show 2.27 kilograms, while a shipping form may require a specific number of decimal places.

Example: convert an 18-pound shipment

Rounded to two decimal places, this is 8.16 kilograms.

Example: convert 75 pounds of freight

Rounded to two decimal places, the shipment weighs 34.02 kilograms.

How to convert pounds and ounces for shipping

A parcel scale may display pounds and ounces separately. Convert the ounces into a fraction of a pound before converting the total.

Example: 3 pounds 8 ounces

Do not enter 3 pounds 8 ounces as 3.8 pounds. Eight ounces equals one-half pound.

Product weight versus packaged shipping weight

A product's net weight may not equal the weight of the shipment. Shipping weight can include:

• the retail package;
• the shipping box;
• protective inserts;
• bubble wrap or paper;
• tape and labels;
• accessories and manuals;
• pallets or freight packaging.

Use the complete packed weight when preparing a carrier label or freight record.

Scale resolution and shipping accuracy

A scale may display whole pounds, tenths of a pound, hundredths of a pound, or pounds and ounces. The converted result should reflect the scale's useful precision.

For example, a scale reading of 10 pounds may not support reporting 4.5359237000 kilograms as though the physical measurement were known to ten decimal places.

A result such as 4.54 kilograms may be more appropriate, unless a shipping or customs system requests another format.

Carrier rounding rules

A carrier may round package weight upward to a billing increment. The rules can differ between services, destinations, account types, and package classes.

For example, a converted weight of 5.67 kilograms could be billed according to a carrier-defined increment rather than the exact decimal value.

Do not round downward when preparing a shipment. Follow the carrier's stated instructions for:

• weight increments;
• decimal places;
• minimum billable weight;
• dimensional-weight calculations;
• maximum package limits.

Customs forms and international records

International forms may require net weight, gross weight, or package weight in kilograms. These fields can describe different quantities.

Before converting, identify whether the form requests:

• the product's net weight;
• the packed shipment's gross weight;
• the weight of each item;
• the weight of the complete parcel;
• the weight of multiple packages combined.

Converting the wrong type of weight accurately still produces the wrong entry.

How to estimate shipping weight mentally

Divide pounds by 2.2 for a quick kilogram estimate.

This method can help with rough planning, but use the exact conversion for labels, customs records, and carrier limits.

Common shipping conversion mistakes

Converting product weight instead of packed weight

Carrier labels normally require the complete shipment weight.

Confusing actual and dimensional weight

They are different measurements and may be used differently for billing.

Writing pounds and ounces as a decimal incorrectly

Four ounces is 0.25 pound, not 0.4 pound.

Rounding downward

Understating a shipment can lead to corrections, delays, or added charges.

Ignoring carrier-specific rules

The mathematical conversion is universal, but billing and documentation rules are not.

Related pounds to kilograms guides

Frequently asked questions