Converters

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The science and history behind units, measurements, and conversions.

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Length Converter Jul 15, 2026 Latest ✦

Why a Unit Conversion Error Destroyed a $327 Million Mars Mission — And Why the US Still Uses Imperial

The US still uses imperial because a voluntary metric conversion law in 1975 lacked enforcement and the Metric Board was abolished in 1982. Here's how the Mars Climate Orbiter was destroyed by a metric-imperial unit confusion costing $327 million, why nautical miles are defined by Earth's geometry (1 arcminute of latitude), and why the modern definition of the metre via the speed of light is reproducible anywhere in the universe without a physical artefact.

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Data Storage Converter Jun 6, 2026

Data Storage Converter — Bits, Bytes, KB, MB, GB & TB Explained

Learn how data storage units work, why your 1 TB drive shows as 931 GB, the difference between bits and bytes, and how to convert between any storage unit with a free converter.
Length Converter Jun 6, 2026

Length Converter — mm, cm, Metres, Inches, Feet & Miles Explained

Learn how to convert between millimetres, centimetres, metres, kilometres, inches, feet, yards, and miles — with real examples for construction, furniture, running, and everyday use.
Fuel Economy Converter Jun 5, 2026

Fuel Economy Converter — MPG, L/100km & km/L Explained

Learn how to convert between MPG, L/100km, and km/L, why US and UK MPG differ, and how to calculate your actual fuel cost with a free fuel economy converter and real examples.