A recipe in cups, a car spec in miles per hour, a hard drive in gigabytes, the unit almost never matches the one you actually think in.
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Unit Converter
Length, weight, temperature, volume, speed, area, time and digital storage. Type in either box, both update instantly.
Runs entirely in your browser using fixed conversion factors. Nothing you enter is sent anywhere.
A note on the trickier categories
Temperature isn't a simple ratio (0°C is 32°F, not 0°F), so those conversions use the exact formula for each pair rather than a multiplier. Digital storage uses the binary convention, 1 KB = 1,024 bytes, matching how your operating system reports file sizes. US and UK gallons are listed separately since they differ by about 20%, a common source of recipe and fuel-economy mistakes.
Unit converter FAQ
Why does the digital storage category give a different answer than I expected?
This converter uses the traditional binary convention where 1 KB = 1,024 bytes (not 1,000), matching how Windows and most file managers report size, and how RAM and storage have always been measured. Some contexts, notably hard drive marketing and networking speeds, use decimal 1,000-based units instead, which is why a "1 TB" drive shows as roughly 931 GB in your operating system.
Why is temperature conversion different from the others?
Every other category is a straight multiplication, doubling the input doubles the output. Temperature scales have different zero points (0°C is not 0°F), so converting needs addition and multiplication together, and doubling a Celsius reading does not double the Fahrenheit one. This tool applies the exact conversion formula for each pair rather than treating temperature like a simple ratio.
How accurate are the month and year conversions in the time category?
A "month" has no fixed length, it ranges from 28 to 31 days, so this uses the average calendar month (365.2425 ÷ 12 days) and the average Gregorian year (365.2425 days, accounting for leap years). That is the standard approach for a general-purpose converter, but it will not match a specific calendar month exactly.
Are US and UK (imperial) gallons the same?
No, and this trips people up constantly: a UK (imperial) gallon is about 4.546 liters, a US gallon is about 3.785 liters, roughly 20% smaller. This converter lists them as separate units specifically so you don't accidentally use the wrong one in a recipe or a fuel-economy comparison.
Is this converter private?
Yes. Every conversion runs in your browser using fixed conversion factors. Nothing you enter is sent to a server.
Free unit converter by ANUPRESS
Type in either box
Most converters make you commit to a direction first, “from” always on the left. This one watches whichever field you’re actually typing in and solves the other one, so if you know the answer you want and need to work backward, that works exactly the same as the forward direction. Switch categories at the top and both unit lists update to match, no re-entering values from scratch.
The three conversions that trip people up
Temperature doesn’t scale the way the others do: 0°C is 32°F, not 0°F, because Celsius and Fahrenheit don’t share a zero point, so this uses the exact formula for each pair rather than a simple multiplier. US and UK gallons differ by about 20% (3.785 liters versus 4.546 liters), a classic source of recipe and fuel-economy mistakes when a source doesn’t specify which one it means. And digital storage here uses the binary convention, 1 KB = 1,024 bytes, matching how your operating system reports file sizes, rather than the 1,000-based convention used in some networking and marketing contexts.
The reference table nobody else shows
Below the converter, a quick-reference table lists what one unit of your current “from” selection equals in every other unit in that category, all at once. Instead of running the same conversion five times to build a mental map (how many feet in a meter, how many yards, how many miles), the whole picture updates the moment you change either the category or the from-unit.