Free online unit converter with 25+ categories: length, mass, temperature, time, area, volume, speed, energy and more. Live conversion as you type.
CalcGlobe's universal unit converter handles 60+ measurement categories — length, mass, temperature, area, volume, speed, time, pressure, energy, power, force, data storage, frequency, angle, fuel economy, typography, and many specialised engineering, electrical, chemistry, and medical unit families.
Every category provides conversion both ways between any two units, plus a side-by-side reference table showing the value in every other unit in the category. For currencies, the converter pulls live rates from the European Central Bank (Frankfurter API) updated each business day.
Inputs: Convert 5 kilometres to other length units
All factors come from internationally accepted SI definitions and physical constants. For most everyday conversions accuracy is far higher than you need (12+ significant figures). For currency, rates are accurate to the previous business day's ECB reference rate — interbank market rates fluctuate by 0.5–2% during trading hours but our reference is sufficient for most personal and small-business use.
Yes — the calculator supports every common metric/imperial pair: km/miles, kg/pounds, °C/°F, litres/gallons (US and UK), Pa/PSI, joules/BTU, and many more. For temperature, conversions use the correct formula (not a simple ratio) because the scales have different zero points.
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