Frequency Converter

What is Frequency?

Frequency is the number of occurrences of a repeating event per unit of time. It's measured in Hertz (Hz), where 1 Hz equals one cycle per second. Frequency is fundamental in physics, engineering, music, and telecommunications. It describes everything from the pitch of musical notes to the frequency of radio waves and the refresh rate of computer monitors.

Major Frequency Units

• Hertz (Hz): The SI unit of frequency. 1 Hz = 1 cycle per second.
• Kilohertz (kHz): 1,000 Hz. Used for audio frequencies and AM radio.
• Megahertz (MHz): 1,000,000 Hz. Used for FM radio and computer processors.
• Gigahertz (GHz): 1,000,000,000 Hz. Used for WiFi, 5G, and modern CPUs.
• Terahertz (THz): 1,000,000,000,000 Hz. Used in scientific research and imaging.
• RPM (Revolutions per minute): Used for rotational speed (motors, engines).
• BPM (Beats per minute): Used for music tempo and heart rate.
• FPS (Frames per second): Used for video and animation frame rates.
• Radians per second (rad/s): Angular frequency used in physics and engineering.
• Degrees per second (°/s): Angular velocity used in navigation and robotics.

Conversion Formulas

The key conversion formulas between frequency units are:

• Hz to kHz: kHz = Hz ÷ 1,000
• Hz to MHz: MHz = Hz ÷ 1,000,000
• Hz to GHz: GHz = Hz ÷ 1,000,000,000
• Hz to RPM: RPM = Hz × 60
• RPM to Hz: Hz = RPM ÷ 60
• Hz to rad/s: rad/s = Hz × 2π ≈ Hz × 6.2832
• Hz to BPM: BPM = Hz × 60
• Period: T (seconds) = 1 / f (Hz)
• Wavelength: λ = c / f (where c = speed of light)

Common Frequency References

Here are some common frequencies you encounter in daily life:

• Human Hearing Range: 20 Hz to 20,000 Hz (20 kHz)
• Middle C (Musical Note): 261.63 Hz
Concert A (A4): 440 Hz (standard tuning pitch)
• US Power Grid: 60 Hz
• European Power Grid: 50 Hz
• AM Radio: 530 kHz to 1,700 kHz
• FM Radio: 88 MHz to 108 MHz
• WiFi 2.4 GHz: 2,400 MHz to 2,483 MHz
• WiFi 5 GHz: 5,150 MHz to 5,825 MHz
• Bluetooth: 2,402 MHz to 2,480 MHz
• 5G Cellular: 600 MHz to 39,000 MHz (39 GHz)
• Computer CPU: 1 GHz to 5 GHz (modern processors)
• Visible Light: 430 THz to 750 THz

Real-World Applications

Frequency measurements are crucial in many fields: audio engineering (sound frequencies), telecommunications (radio frequencies), electrical engineering (AC power), music (musical notes and tempo), video production (frame rates), automotive (engine RPM), medicine (heart rate, EEG), physics (wave phenomena), and computer science (processor clock speeds). Understanding frequency conversions helps in designing systems, troubleshooting issues, and communicating technical specifications across different fields and regions.