Free online unit converters for the most common metric and imperial measurements. All tools are instant, bidirectional, and completely free — no sign-up needed.
Convert feet↔cm, metres↔feet, km↔miles, inches↔mm, yards↔metres. Includes a reference table of common conversions.
Convert pounds↔kg, ounces↔grams, stone↔kg, and metric tonnes↔US tons. Useful for cooking, shipping, health, and travel.
Convert cups↔ml, gallons↔litres, fluid oz↔ml, tablespoons↔ml, teaspoons↔ml, pints↔litres. US and Imperial variants clearly labelled.
Convert between Celsius, Fahrenheit, and Kelvin — all three fields update live. Includes reference table for cooking, weather, and science.
Convert between km/h, mph, m/s, and knots — all four update simultaneously. Useful for driving, aviation, sports, and weather reports.
Unit conversion mistakes are surprisingly common — and in some contexts they can be costly. Using an incorrect tablespoon measurement in a baking recipe can ruin a cake; misreading a parcel weight in the wrong unit can mean unexpected shipping charges; and failing to understand a speed limit in a foreign country can mean a fine. These converters are designed to eliminate those errors with fast, accurate, bidirectional conversion for the units Australians encounter most often.
Every converter on this page works in both directions — type in either field and the other updates instantly. Where units have regional variants (such as US gallons vs Imperial gallons, or US pints vs UK pints), the differences are clearly labelled so you always pick the right one. No sign-up, no ads that block the tool, no waiting. Just the answer you need.