Unit & Dimension Converter

This product dimension converter turns inconsistent length, weight, and volume values into a single, clean unit system so your catalog records line up across suppliers, channels, and ERPs. Paste a value or a column of dimensions, pick a target unit, and get instant, traceable conversions for furniture, MRO parts, CPG packs, or industrial components.

What it checks

• Length and dimension conversions — mm, cm, m, in, ft between metric and imperial, including “L x W x H” packed-dimension strings (for example 1200 x 800 x 144 mm for a furniture carton).
• Weight and mass conversions — g, kg, oz, lb, including net vs gross weight fields common in CPG and freight records.
• Volume and capacity conversions — mL, L, fl oz, gal (US and imperial flagged separately), useful for chemicals, lubricants, and packaged liquids.
• Mixed-unit strings — values like 5' 6" or 2 m 40 cm parsed into a single normalized number.
• Precision and rounding — shows the full-precision result alongside a rounded value so you control significant figures before writing back.
• Unit-of-measure labels — flags ambiguous or non-standard unit text (such as cu ft, cbm, or a bare ") so it can be mapped to a clean code.
• Round-trip sanity — converts back to the source unit to confirm no precision was lost in the process.

How it works

The converter applies fixed, internationally defined conversion factors. The metric base units (metre, kilogram, litre) anchor to the SI system, and imperial conversions use the exact international definitions — for example, one inch equals exactly 25.4 millimetres, so a 48 in shelf width becomes 1219.2 mm. US and imperial gallons are kept distinct because they differ by roughly a fifth, a common source of silent data errors in cross-border catalogs.

Every value is parsed to a common base unit, converted to your chosen target, and then displayed with both raw and rounded precision. Packed-dimension strings are split on their separators, each component is converted independently, and the result is reassembled in the original order so a furniture carton or industrial enclosure keeps its L x W x H meaning.

Conversion alone normalizes the number, but it does not standardize the unit label that ships in your feed. A value of 1219.2 mm still needs a clean code (such as MMT) for downstream systems. For that label-level normalization, pair this tool with a unit-of-measure standard and a unit code validator.

Related resources

FAQ

How do I convert product dimensions from inches to mm? +

Enter the value with its unit (for example 48 in) and set the target to millimetres. The converter multiplies by the exact factor of 25.4, so 48 in becomes 1219.2 mm. For packed dimensions like 48 x 24 x 1.5 in, paste the whole string and each axis is converted independently while keeping the L x W x H order.

What is the difference between a US gallon and an imperial gallon? +

A US gallon is about 3.785 litres and an imperial (UK) gallon is about 4.546 litres — roughly a 20% difference. Catalogs that mix the two without labeling them produce silent volume errors, which is why this product dimension converter keeps US and imperial gallons as separate target units rather than guessing.

Why do my supplier feeds have so many different units for the same product? +

Suppliers author data in their home market and system defaults, so the same shelf might arrive as 1.2 m from one vendor, 1200 mm from another, and 47.24 in from a third. Converting to a single base unit is the first step; mapping the unit label to a standard code is the second. See the UOM glossary entry and unit code validator linked above.

Should I store dimensions in metric or imperial? +

Most modern catalog and PIM systems store a single canonical unit per attribute (commonly metric for length and weight) and convert for display per channel or region. The key is consistency: pick one base unit per field, normalize every incoming value to it, and keep the original source value for provenance.

Does converting units change my unit-of-measure codes? +

No. Converting the number from 48 in to 1219.2 mm does not update the code your feed carries. You still need to set the UOM label (such as MMT) so downstream ERPs, marketplaces, and AI search engines read it correctly. Validate those codes with the linked unit code validator before you publish.