Question 1

What is unit conversion?

Accepted Answer

Unit conversion is the process of changing a measurement from one unit to another within the same measurement category. For example, converting kilometers to miles or Celsius to Fahrenheit. It uses defined ratios or formulas to ensure the quantity remains equivalent.

Question 2

How does this unit converter work?

Accepted Answer

Each category has a base unit (e.g., meters for length, kilograms for weight). When you enter a value, the tool first converts it to the base unit, then from the base unit to the target unit. Temperature uses dedicated formulas instead of simple multiplication factors.

Question 3

Is my data safe with this tool?

Accepted Answer

Yes. This unit converter runs 100% in your browser using client-side JavaScript. No data is sent to any server. You can even use it offline once the page has loaded.

Question 4

What is the difference between metric and imperial units?

Accepted Answer

The metric system (SI) uses units like meters, kilograms, and liters, based on powers of 10. The imperial system uses units like feet, pounds, and gallons, which have irregular conversion factors. Most countries use metric; the US, Liberia, and Myanmar still use imperial for everyday measurements.

Question 5

How do I convert Celsius to Fahrenheit?

Accepted Answer

Multiply the Celsius temperature by 9/5 (or 1.8) and then add 32. For example, 100°C × 1.8 + 32 = 212°F. To go the other way, subtract 32 then multiply by 5/9.

Question 6

What is the difference between a US gallon and a UK gallon?

Accepted Answer

A US gallon is approximately 3.785 liters, while a UK (imperial) gallon is approximately 4.546 liters. The UK gallon is about 20% larger than the US gallon. This difference applies to all related units (pints, quarts, fluid ounces).

Question 7

Are the data/digital conversions using binary or decimal prefixes?

Accepted Answer

This tool uses binary (base-2) prefixes: 1 KB = 1024 bytes, 1 MB = 1,048,576 bytes, etc. This is the traditional computing convention (IEC: KiB, MiB). Storage manufacturers often use decimal prefixes (1 KB = 1000 bytes), which is why drives appear smaller than advertised.

Question 8

How accurate are these conversions?

Accepted Answer

The conversion factors used are precise to internationally recognized standards. Results are displayed to up to 8 significant decimal places. For extremely large or small numbers, scientific notation is used to maintain precision.

Question 9

What is a nautical mile?

Accepted Answer

A nautical mile is exactly 1,852 meters (about 1.151 statute miles). It is based on one minute of arc of latitude on the Earth’s surface and is used primarily in maritime and air navigation.

Question 10

Why does the month use 30 days and the year use 365 days?

Accepted Answer

For simplicity and consistency, this converter uses 30 days per month and 365 days per year as standard approximations. Actual months vary from 28 to 31 days, and leap years have 366 days. These approximations are the most commonly used in unit conversion tools.

Category	Conversion	Factor
Length	Kilometers to Miles	1 km = 0.621371 mi
Weight	Kilograms to Pounds	1 kg = 2.20462 lb
Temperature	Celsius to Fahrenheit	°F = °C × 9/5 + 32
Volume	Liters to US Gallons	1 L = 0.264172 gal
Speed	km/h to mph	1 km/h = 0.621371 mph
Data	Gigabytes to Megabytes	1 GB = 1024 MB

Unit Converter

Common Conversions

What is Unit Conversion?

Metric vs. Imperial Systems

Metric (SI) System

Imperial System

Common Conversions Reference

Frequently Asked Questions