How Should Units of Measurement for Different Markets Be Handled in Product Page Translation?

Units of measurement on product pages cannot be handled by translation alone: the same dimensions, weight, or capacity may be expressed using different units in the target market, and the values must be converted accordingly. When doing so, retain reliable original specifications, choose an easy-to-read presentation format for the market, and verify that conversions, rounding, and figures shown throughout the page are consistent.

It is especially important to distinguish between approximate values provided for ease of reference and specification values that determine whether a product can be installed or used. The former can be rounded to a reasonable degree; the latter require sufficient precision and should state any permitted tolerances or applicable conditions.

Identify what needs converting before choosing the display units

Before translating a product page, obtain the original values from the product specification sheet, drawings, or another verified data source, and record them together with their units, measurement conditions, and precision. A figure listed only as “Weight: 25” does not indicate whether the unit is kilograms or pounds, nor whether it refers to the product’s net weight or its weight including packaging.

When organizing specifications, list the product dimensions, installation dimensions, and package dimensions separately, as well as the net and gross weights. For dimensions given in length, width, and height order, clearly label each dimension so that readers are not left to guess which direction each number refers to after translation.

Choose display units based on the target market and the product’s intended use, rather than simply applying the same unit changes across the page. For example, pages targeting the U.S. market may prioritize inches and pounds, while markets using the metric system may favor millimeters, centimeters, kilograms, or liters. A language may be used across multiple countries, so it should not be assumed that all visitors share the same unit preferences.

For pages serving multiple markets, displaying both units can help prevent misunderstandings, for example, “Length: 1,200 mm (approx. 47.24 in).” The primary unit should match the page’s main target market, and converted values in parentheses should be generated according to consistent rules.

How to convert dimensions, weight, and capacity

Before converting, confirm that the original and target units measure the same physical quantity. The following are common conversions used on product pages. The number of decimal places to display should still be determined based on the precision of the original data and its intended use:

• Length: 1 inch (in) = 25.4 millimeters (mm); 1 foot (ft) = 12 inches. For example, 500 mm is approximately 19.69 in.
• Weight: 1 kilogram (kg) is approximately 2.20462 pounds (lb). For example, 10 kg is approximately 22.05 lb.
• Liquid capacity: 1 liter (L) is approximately 0.26417 U.S. liquid gallons or 0.21997 Imperial gallons. 10 L is approximately 2.64 U.S. gallons, or 2.20 Imperial gallons.

Do not write “gal” alone and assume that all readers will interpret it the same way: U.S. and Imperial gallons are different. For products involving liquid capacity, specify which type is used where appropriate. For flow rates, retain the time unit as well; when converting L/min to U.S. liquid gallons per minute, for example, do not omit “per minute.”

Area and volume cannot be converted by applying a length conversion factor directly. When a length is scaled by a factor, area changes by the square of that factor and volume by its cube. For example, 1 square meter is approximately 10.764 square feet, not 3.281 square feet.

Rounding must not change the meaning of a specification

More decimal places do not necessarily make a displayed value better. If the original dimension is only “approximately 50 cm,” converting it to “19.6850 in” suggests a level of precision that the source data does not support. In this case, “approximately 19.7 in” better reflects the precision of the original information.

Conversely, parameters such as mounting-hole spacing, interface dimensions, and clearance fits should not be rounded excessively for the sake of a simpler page. If a drawing specifies a hole spacing of 25.4 mm, displaying it as 1 in is accurate. But if the original value is 25 mm, displaying it directly as “1 in” would conceal a difference of approximately 0.4 mm. For these specifications, retain an appropriate number of decimal places and use the drawing or a clearly specified reference value as the basis for final confirmation.

For values with tolerances, convert both the nominal value and the tolerance. For example, 25.4 ± 0.2 mm can be approximated as 1.000 ± 0.008 in. The number of decimal places retained should meet the precision requirements of the product drawing. Do not convert only the nominal value and omit the permitted deviation, or treat an approximate display value as a new production reference.

Convert both ends of a range separately and make the comparison clear. For example, “Operating temperature: 0–40 °C” can be written as “32–104 °F.” Temperature conversion is not a simple multiplication or division: to convert Celsius to Fahrenheit, use “°F = °C × 9/5 + 32.”

Identify specifications that cannot be converted by value alone

Not every item that looks like a unit of measurement is suitable for automatic conversion. Thread specifications, nominal pipe sizes, wire gauges, and nominal screen diagonal sizes may follow industry conventions or standards. A nominal size does not necessarily equal the actual measured dimension. Mechanically converting and replacing a number in a specification name may lead to incorrect product selection.

For these parameters, retain the original specification name and its applicable standard. If a reference dimension in another unit is needed, it must be based on the relevant drawing or specification documentation, with nominal values distinguished from measured values. Similarly, package quantities and the number of items per carton are not weights or capacities; they should not be included in unit conversion just because the fields contain numbers.

Parameters such as pressure and power also require their full conditions to be retained. For example, pressure must be identified as gauge or absolute pressure, and it must be confirmed whether a power value is rated or peak power. Changing only the unit while omitting these conditions can alter the meaning of a parameter, even if the arithmetic is correct.

Check consistency across all instances of the data before publishing

Product information may appear in titles, specification tables, image annotations, downloadable materials, product variants, and quotation attachments. After updating the main text, check other locations where the same parameter appears. If the specification table says “10 kg” but the image still says “10 lb,” readers cannot tell which value is correct.

As a practical measure, maintain a single, consistent parameter record that includes the original value, original unit, data source, target unit, converted value, rounding rule, and review status. Generate results for different language pages from the same original value rather than reconverting an already rounded value, which can cause errors to accumulate.

When checking how values appear on the page, also pay attention to number formatting. Conventions for decimal points and thousands separators vary by region. “1,250” may be understood as one thousand two hundred fifty or as one point two five. Use consistent number formatting for the target market, and clarify key parameters that could be ambiguous by considering their units, context, and page language.

After completing the updates, verify the calculations using a few boundary cases: check the smallest dimension, the largest capacity, a parameter with a tolerance, and data that can be easily confused, such as gallons or temperature. Recalculate each from the original value. If the page supports switching units, also check that the values, unit labels, and variant information change in sync. Before publication, compare key specifications that affect installation, safety, or order confirmation against the original drawings or verified product documentation, item by item.