Type on either side
Edit the left or right value and the other side updates. Change a unit afterward and the side you last typed into remains the source.
Put every measurement
on speaking terms.
Miles to kilometers, pounds to kilograms, Fahrenheit to Celsius, gallons to liters, and the other conversions that should not require a scavenger hunt.
Conversion happens on your device. Values are not transmitted or saved as a history.
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Choose what you are measuring
Results are rounded for display; the calculator keeps greater precision internally.
Your category and unit pair are remembered. The numbers themselves are not. Type on either side; that side stays in charge until you edit the other one.
Built for everyday measurements
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Fast enough to stay out of the way.
Similar names stay labeled
U.S. and Imperial liquid units are kept separate. Decimal KB and binary KiB are also listed as different units.
Temperature gets real math
Fahrenheit, Celsius, and Kelvin use the correct offsets, and the converter catches temperatures below absolute zero.
Unit-conversion questions.
Which measurements are included?
Length, weight, temperature, area, volume, speed, and digital storage are included. Common U.S., Imperial, metric, decimal-storage, and binary-storage units are labeled separately.
Does a U.S. gallon equal an Imperial gallon?
No. One U.S. liquid gallon is 3.785411784 liters; one Imperial gallon is 4.54609 liters. The tool lists them separately.
What is the difference between MB and MiB?
One decimal megabyte (MB) is 1,000,000 bytes. One binary mebibyte (MiB) is 1,048,576 bytes. Storage makers and operating systems do not always display these the same way.
Why does the result show fewer digits?
The display removes meaningless trailing zeroes and limits very long decimals. Internal calculations retain greater precision.
Can I use this for regulated or engineering work?
It is tested for reliable everyday conversion. Verify critical technical, medical, legal, or regulated measurements with the standard required for that work.