Frequently Asked Questions
Is this unit converter free to use?
Yes, the Global Unit Converter is 100% free with no daily limits, subscriptions, or paywalls.
Does the converter work offline?
Yes. Once the page is loaded, all conversion formulas (over 300 units) remain in your browser. You don't need an active internet connection to perform conversions after the initial load.
How accurate are the conversions?
We use standard SI and international mathematical definitions for base conversion factors. Conversions are calculated using extreme precision, avoiding typical floating-point errors by truncating safely at 12 decimal places unless scientific notation is required.
Why do my Fuel Economy numbers get smaller when the value gets bigger?
Fuel economy uses an inverse relationship in some regions. For example, Miles per Gallon (MPG) measures distance per volume, whereas Liters per 100km (L/100km) measures volume per distance. As a car gets more efficient, its MPG goes up, but its L/100km goes down. Our converter handles this inverse formula automatically.
What are regional units like Tola, Bigha, and Pyeong?
While the metric system is a global standard, many countries still actively use regional units for trade and real estate. For example, the Tola is deeply used in South Asia for weighing gold. The Bigha (India/Nepal), Rai (Thailand), and Pyeong (Korea) are still the standard for measuring land plots.
What is a Smoot?
A Smoot is a non-standard and humorous unit of length created by MIT fraternity members in 1958. It is defined as the height of Oliver R. Smoot (1.7018 meters). The Harvard Bridge in Massachusetts is famously marked in Smoots.
Can I convert complex units like Bytes to Gibibytes?
Yes. We support both decimal storage sizes (Kilobytes, Megabytes, Gigabytes - base 10) and binary storage sizes (Kibibytes, Mebibytes, Gibibytes - base 2). This helps resolve common confusion when buying hard drives that show different capacities in Windows versus macOS.
How do I swap the 'from' and 'to' units easily?
Simply click the round arrow icon located between the 'From' and 'To' sections on the main converter. This instantly swaps your selected units and seamlessly adjusts the input value.
Are temperature conversions exact?
Yes, temperature requires non-linear algebraic conversion (e.g., Fahrenheit to Celsius uses `(°F - 32) × 5/9`). We don't use simple multiplication factors for temperature; they are correctly mapped mathematically.
How many total units does this tool support?
We currently support over 300 separate units spread across 15+ major categories (Length, Weight, Volume, Area, Time, Temperature, etc.). This makes it one of the most comprehensive converters available online.