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Convert between metric and imperial units instantly. Length, weight, temperature, volume, area, speed, and fuel economy with Australian defaults.
Length Conversion
Quick Conversions — Length
| Value | From | = | Result | To |
|---|---|---|---|---|
| 1 | in | = | 2.54 | cm |
| 1 | ft | = | 30.48 | cm |
| 1 | yd | = | 0.9144 | m |
| 1 | mi | = | 1.60934 | km |
| 1 | cm | = | 0.3937 | in |
| 1 | m | = | 3.28084 | ft |
| 1 | km | = | 0.6214 | mi |
| 1 | nmi | = | 1.852 | km |
Click any row to load it into the converter.
Most-Searched Conversions
Metric to Imperial
1 cm = 0.3937 in
1 km = 0.6214 mi
1 kg = 2.20462 lb
1 L = 0.2642 US Gallons
1 Hectares = 2.47105 Acres
Imperial to Metric
1 in = 2.54 cm
1 mi = 1.60934 km
1 lb = 0.4536 kg
1 US Gallons = 3.78541 L
1 Acres = 0.4047 Hectares
Metric vs Imperial
Australia officially uses the metric system (SI units) since 1970. However, some imperial units persist informally — many Australians still quote their height in feet and inches, and weight in stone.
Australian Measurements
Australian cups are 250mL (not US 236mL). Australian tablespoons are 20mL (not the US/UK 15mL). These differences matter in cooking — always check which measurement standard your recipe uses.
Common Conversions
The most-searched conversions: inches to cm, pounds to kg, Fahrenheit to Celsius, miles to km, and cups to mL. This converter handles all of these with Australian defaults selected.
Temperature Reference
AU Speed Limits
Fuel economy
Australia uses L/100km — lower is better. The US uses mpg (miles per gallon) — higher is better. A car rated 7 L/100km is roughly 33.6 mpg (US).
Measurement resources
For official Australian measurement standards, refer to the National Measurement Institute ↗
Australia adopted the metric system in 1970, but many international standards still use imperial measurements. Whether you are converting inches to centimetres for a DIY project, pounds to kilograms for shipping, or Fahrenheit to Celsius for a weather comparison, this converter handles all the common units with precision. All calculations use internationally recognised conversion factors.
Australia has unique measurement conventions worth knowing. Australian cups are 250mL (larger than US cups at 236mL), and Australian tablespoons are 20mL (larger than the US/UK standard of 15mL). Speed limits are posted in km/h, fuel economy is measured in L/100km, and distances are in kilometres. This converter defaults to Australian units where applicable, making it especially useful for cooking conversions, road trips, and everyday calculations.