Wavelength Converter
Converts electromagnetic frequency and wavelength using λ = c / f.
Wavelength will appear here
Frequency will appear here
Constants and notes
Speed of light in vacuum: c = 299,792,458 m/s
λ (m) = c / f (Hz)
f (Hz) = c / λ (m)
Enter a value in either field; the other updates automatically.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Celsius will appear here
Fahrenheit will appear here
Kelvin will appear here
Notes
Absolute zero: 0 K = -273.15 °C = -459.67 °F
C = (F - 32) * 5/9
F = C * 9/5 + 32
K = C + 273.15
Pick a unit, type a value, and the other two update instantly.
Parsec Converter
Convert between parsecs, meters, and astronomical units.
Parsecs will appear here
Meters will appear here
AU will appear here
Notes
Definition: 1 pc = 3.0856775814913673 × 10^16 m
Definition: 1 AU = 149,597,870,700 m
m = pc * 3.0856775814913673e16
pc = m / 3.0856775814913673e16
AU = m / 149597870700
Pick a unit, type a value, and the other two update instantly.