Frequency Calculator
Calculate frequency from wavelength
Frequently Asked Questions
What is frequency and how is it measured?
Frequency is the number of cycles per second, measured in Hertz (Hz). 1 Hz = 1 cycle per second. Common multiples include kHz (1,000 Hz), MHz (1,000,000 Hz), and GHz (1,000,000,000 Hz).
How do I convert between frequency and wavelength?
Use the formula: wavelength = speed / frequency. For electromagnetic waves: λ = c/f where c = 299,792,458 m/s. A 100 MHz FM radio signal has a wavelength of about 3 meters.
What is the relationship between frequency and period?
Period is the inverse of frequency: T = 1/f. A 60 Hz signal has a period of 1/60 = 0.01667 seconds (16.67 milliseconds). The calculator converts between these instantly.
What frequency ranges are used in everyday technology?
Power lines: 50-60 Hz. AM radio: 530-1700 kHz. FM radio: 88-108 MHz. Wi-Fi: 2.4 GHz and 5 GHz. 5G cellular: 600 MHz to 39 GHz. Microwave ovens: 2.45 GHz. Visible light: 430-770 THz.
How does frequency relate to musical pitch?
Higher frequency means higher pitch. Middle C (C4) is 261.63 Hz. Concert A (A4) is 440 Hz. Each octave doubles the frequency — A5 is 880 Hz. The calculator can convert between frequency and musical note names.