What categories are supported?
It supports six categories of data size (B/KB/MB/GB/TB/PB), velocity (m/s, km/h, mph, knot), pressure (Pa, hPa, atm, bar, psi, mmHg), energy (J, kJ, cal, kcal, Wh, kWh, eV), angle (deg, rad, grad, turn), frequency (Hz, kHz, MHz, GHz).
Does the conversion take place in real time?
Yes, the conversion result is displayed immediately upon entering a numerical value in the input field. There is no need to press a conversion button, as the conversion is performed in real time at the same time as the keyboard input.
Can you confirm the conversion formula?
Yes, the conversion formula (calculation formula) is displayed below the conversion result. This is useful for learning and verification, as you can see at a glance what calculations were used to perform the conversion.
Is the conversion history saved?
Yes, a history is automatically recorded for each conversion. The most recent conversion history is displayed in a list, allowing you to quickly check the results of previous conversions. The history is reset when you close the page.
What is the Swap Button?
By pressing the swap button (swap button), you can instantly swap the source and destination units of conversion. This is useful when you want to quickly perform conversions in the opposite direction.
What are the data size conversion criteria?
Data size is calculated on a binary number basis (binary) based on 1KB = 1024B. 1MB = 1024KB, 1GB = 1024MB, 1TB = 1024GB, 1PB = 1024TB.
What precision and decimal places does the converter use for results?
Most unit converters maintain high precision (typically 10-15 significant figures) to ensure accuracy across different unit scales. The display usually shows 2-4 decimal places for readability, but you can often see the full precision by hovering over results or copying the value. This high precision is important for scientific and engineering calculations where small errors can compound.
Can I convert between units in different categories (e.g., velocity to energy)?
No—you cannot directly convert between units from different categories because they measure fundamentally different things (velocity is distance/time, while energy is force × distance). Each category has its own set of related units that share the same physical dimension. If you need to combine units from different categories, you'll need to do multi-step calculations outside the converter.
What units are not supported by this converter, and what should I do if I need them?
The converter covers the most common units in each category, but some specialized or regional units may not be included. If a unit you need is missing, you can often approximate using the closest supported unit or calculate the conversion manually if you know the conversion factor. Check the tool's documentation or FAQ to see the complete list of supported units in each category.
How should I handle very large or very small numbers to avoid errors?
When converting extremely large numbers (like astronomical distances) or extremely small numbers (like atomic scales), the converter uses scientific notation (e.g., 1.5e10) to maintain accuracy and readability. Always check that your input is in the correct unit before converting, as errors compound quickly with very small or very large values. For critical calculations in science or engineering, consider using specialized scientific calculators or software as a double-check.
Can I create custom unit conversions or define my own units?
Most general-purpose converters don't allow custom unit creation, as they're designed for standard units defined by international standards (SI, imperial, etc.). If you need custom conversions, you can manually calculate the conversion factor and use the tool's results as intermediate steps. For frequently used custom conversions, consider using a programmable calculator or spreadsheet that lets you define formulas.
How does the converter handle different international standards for the same unit?
Many units have different definitions in different countries or contexts (e.g., gallons differ between US and UK, nautical miles vs statute miles)—the converter typically defaults to the most common international standard (SI or US standard). Check the tool's settings or documentation to see if you can switch between different definitions for the same unit. When precision matters, always verify which standard definition the tool is using for your calculations.