| Convert | Equals |
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This page never sends what you type to a server. Every conversion is calculated locally in your browser using standard conversion factors, and nothing is stored once you leave the page.
How this unit converter works
Pick a category, then choose the units you're converting from and to. Type a number in either box and the other one updates instantly — the converter works in both directions, so you can enter a value on the "To" side just as easily as the "From" side. Use the swap button to flip the two units in one click.
Every category is converted through a common base unit (for example, meters for length or liters for volume) using standard, internationally recognized conversion factors, so results stay consistent and accurate across the whole tool.
Unit categories supported
| Category | Includes |
|---|---|
| Length | Millimeters, centimeters, meters, kilometers, inches, feet, yards, miles, nautical miles |
| Weight & mass | Milligrams, grams, kilograms, metric tons, ounces, pounds, stone, US tons |
| Temperature | Celsius, Fahrenheit, Kelvin |
| Volume | Milliliters, liters, cubic meters, teaspoons, tablespoons, fl. oz, cups, pints, quarts, gallons |
| Area | mm², cm², m², km², hectares, in², ft², yd², acres, mi² |
| Speed | Meters/second, km/h, mph, knots, feet/second |
| Time | Milliseconds, seconds, minutes, hours, days, weeks, months, years |
| Digital storage | Bits, bytes, KB, MB, GB, TB, PB (binary, 1024-based) |
Frequently asked questions
Is this unit converter free?
Yes. It's completely free, runs in your browser, and doesn't require an account, download or payment.
How accurate are the conversions?
Conversions use standard, internationally recognized conversion factors (for example, 1 inch equals exactly 2.54 centimeters) calculated with full floating-point precision, so results are accurate for everyday, academic and professional use.
Does this tool store or send my data anywhere?
No. Every conversion happens locally in your browser. Nothing you type is sent to a server or saved.
Can I convert between metric and imperial units?
Yes. Every category mixes metric units (meters, kilograms, liters, Celsius) with imperial or US customary units (feet, pounds, gallons, Fahrenheit) in the same dropdowns, so you can convert freely between the two systems.
Why does digital storage use 1024 instead of 1000?
File sizes on most operating systems are traditionally measured in binary units, where 1 KB = 1024 bytes rather than 1000. This converter follows that common convention for KB through PB.
Can I use this unit converter on mobile?
Yes, the converter is fully responsive and works on phones, tablets and desktop browsers.