About Convert Units Lab

We convert units. We also explain what they actually mean.

Most unit converters give you a number and nothing else. Convert Units Lab gives you the number plus real-world context — because knowing that 10 kilometres is 6.21 miles is useful, but knowing it takes most people around 55 minutes to run at a comfortable pace is actually helpful.

We built this site for runners checking race distances, people buying TVs in a country that uses different measurement conventions, anyone trying to understand a height, a room size, or a drive distance in a system they're less familiar with.

What makes it different

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Intent-aware

The page title for 180 cm to feet says "How tall is 180 cm?" not "Convert centimetres to feet." Because that's what you actually wanted to know.

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Real-world context

42.2 km doesn't just become 26.2 miles — it becomes a marathon, with pace estimates and context about what it takes to run one.

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Screen size guide

A 55-inch TV isn't just 139.7 cm diagonal — we tell you the actual width, the recommended viewing distance, and what room size it suits.

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Height comparisons

180 cm in feet gives you 5 ft 11 in — plus whether that's tall, average, or short, with country-by-country height averages.

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Honest about unusual pairs

If you convert 10,000 km to inches we'll tell you that's an unusual combination and suggest a more practical alternative.

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Free, fast, no account

No sign-up, no paywall, no app to install. Works on any device, loads instantly, and your recent conversions are saved locally.

What we cover

Currently Convert Units Lab covers length and distance — millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles. That's 56 unit pair combinations, each with specific real-world context.

We're building out additional categories including weight and mass, temperature, area, speed, and cooking volume. Each new category follows the same principle: the number is just the start.

Who we are

Convert Units Lab is an independent project built to be genuinely useful. The site is free to use and supported by advertising. We have no affiliation with any measurement standards body, educational institution, or commercial organisation.

If you find an error, have a suggestion, or want to get in touch, email us at hello@convertunitslab.com.

Try it now

Start with one of the most common searches — how tall is 180 cm in feet?

180 cm to feet →