Conversions & Everyday
Metric-Imperial Converter
Convert between metric and imperial units for length, weight, temperature, and volume.
How this calculator works
The converter applies the standard conversion factor between the selected units. Each conversion is mathematically exact (e.g. 1 inch = exactly 25.4 mm). The conversion formula is shown alongside the result so you can verify or apply it manually. Temperature uses the Celsius/Fahrenheit/Kelvin conversion formulas.
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FAQ
Frequently asked questions
Does Australia use metric or imperial?
Australia officially adopted the metric system in 1966 (currency) and completed conversion by the mid-1970s. All official measurements, speed limits, and product labels use metric. However, many Australians still informally use feet/inches for height and some use pounds for weight.
What are the most common conversions?
Popular conversions: 1 inch = 2.54 cm, 1 foot = 30.48 cm, 1 mile = 1.609 km, 1 pound = 0.4536 kg, 1 stone = 6.35 kg, 1 gallon (US) = 3.785 L, 1 gallon (imperial) = 4.546 L. Temperature: °F = (°C x 9/5) + 32.
Why do some Australians still use imperial?
Older Australians who grew up pre-metrication often still think in feet, inches, and pounds. Real estate also uses a mix — room sizes in metres but land in square metres (not acres). Screen sizes are universally in inches. Tyre pressures sometimes use PSI alongside kPa.
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