Type on either side — the other one follows. Length, mass, temperature and data size, with the kilobyte-versus-kibibyte mess spelled out instead of quietly rounded away.
kB vs KiBA kB is 1,000 bytes — the decimal prefix that drive makers, network speeds and phone plans use. A KiB is 1,024 bytes — the binary prefix your operating system counts in. Both are correct; they just count differently, and the gap compounds: 2.4% at kilo, 4.9% at mega, 7.4% at giga, 10% at tera.1 KiB = 1.024 kB
Every amount is stored once in a base unit — meters for length, kilograms for mass, bytes for data, kelvin for temperature — then converted back out for each unit on screen. Both sides read from that one number, so they can never drift apart no matter which side you type into.
The factors are the exact defined ones, not approximations: 1 in = 25.4 mm,
1 lb = 0.45359237 kg, 1 nmi = 1852 m, 1 KiB = 1024 B.
Temperature is the odd one out — it shifts as well as scales
(K = °C + 273.15, K = (°F + 459.67) × 5/9), which is why doubling 20 °C does not
give you twice the heat.
Results are rounded to the chosen number of significant digits, then trailing zeros are dropped. The
chip next to the answer says exact when nothing was hidden by that rounding, and
rounded when digits were dropped. Very large and very small results switch to exponent form
rather than printing a wall of zeros.