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Unit converter
Length, mass, volume, and temperature—pick units and convert instantly on your device.
How unit conversion works here
Length, mass, and volume convert through fixed SI reference factors (meter, kilogram, liter). Temperature converts via Celsius as an intermediate step so Celsius, Fahrenheit, and Kelvin stay consistent.
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Frequently asked questions
How accurate are conversions?
Uses standard conversion factors; suitable for everyday use—not certified for regulated trade.
US vs imperial gallons?
Volume uses US liquid gallon unless noted.
Do you upload my numbers?
No—everything runs locally.
Negative temperatures?
Supported where physically meaningful.