Conversion Tools

Conversions with the working shown

A conversion you can verify beats one you have to trust. Every converter here shows the exact factor or formula behind the answer and, for units, the value in all the common scales at once — so converting 5'9" or 180°F never takes two trips. Length and weight use the exact international definitions (1 inch = 2.54 cm, 1 pound = 0.45359237 kg), and temperature converts between Celsius, Fahrenheit, Kelvin and Rankine with reference points to sanity-check against.

The Currency Converter uses reference exchange rates for everyday estimates — for a real transfer or invoice, confirm the live rate with your bank, since market rates move constantly. For measurements, start with the Length Converter and Weight Converter, which cover metric and imperial units in both directions. Heights get their own tool — the Height Converter — because “5 ft 9 in” deserves a cleaner answer than a decimal.

Often, though, you know the exact pair you need. The popular conversions listed below this guide are single-purpose pages — Kg to Lbs, Cm to Inches, Celsius to Fahrenheit, Liters to Gallons, Mph to Kmh and fifteen more — each one pre-set to that pair, with its exact factor, a conversion table written for that pair's everyday range, and the mistakes people make with it. They are the fastest route from a search box to an answer we offer.

Two full converters complete the set: the Speed Converter shows mph, km/h, m/s, ft/s and knots side by side, and the Area Converter covers square feet, metres, yards, acres and hectares with the exact international factors — the natural next step from the sq ft pair pages when a land or room measurement needs more than one pair.