Frequency Converter

Convert between different units of frequency.

Common Frequency Conversions

• 1 kHz = 1,000 Hz
• 1 MHz = 1,000,000 Hz
• 1 GHz = 1,000,000,000 Hz
• 1 THz = 1,000,000,000,000 Hz
• 1 RPM = 1/60 Hz ≈ 0.016667 Hz
• 1 rad/s = 1/(2π) Hz ≈ 0.159155 Hz

Reference Frequencies

• Human hearing range: 20 Hz – 20 kHz
• AC power (US): 60 Hz
• AC power (Europe): 50 Hz
• AM radio: 540 kHz – 1,600 kHz
• FM radio: 87.5 MHz – 108 MHz
• Wi-Fi (2.4 GHz band): 2.4 – 2.5 GHz
• Wi-Fi (5 GHz band): 5.15 – 5.85 GHz
• Visible light: 430 – 770 THz

How It Works

Frequency measures how often a repeating event occurs per unit of time. The SI unit is the hertz (Hz), defined as one cycle per second. Higher prefixes (kHz, MHz, GHz, THz) represent powers of 1,000.

RPM (revolutions per minute) measures rotational frequency. Since one revolution equals one cycle, dividing RPM by 60 gives the frequency in hertz.

Radians per second (rad/s) expresses angular velocity. One full cycle equals 2π radians, so dividing rad/s by 2π converts to hertz.