Frequency Unit Converter

Convert between Hz, kHz, MHz, GHz, THz and RPM instantly. Ideal for electronics, audio, and networking.

Instant result Runs in browser

Tip: Enter a value in any field — all other units update automatically.

Common frequency reference values

HzkHzMHz
Low bass limit (human hearing) 20 0.02 0.00002
High treble limit (human hearing) 20 000 20 0.02
AC mains frequency (Europe / Turkey) 50 0.05 0.00005
AM radio band 535 000–1 700 000535–1 7000.535–1.7
FM radio band 87 500 000–108 000 00087 500–108 00087.5–108
Wi-Fi 2.4 GHz band 2 400 000 0002 400 0002 400
Typical CPU clock speed 1–5 × 10⁹ 1–5 × 10⁶1 000–5 000

Key Multipliers

1 kHz = 10³ Hz
1 MHz = 10⁶ Hz
1 GHz = 10⁹ Hz
1 THz = 10¹² Hz
1 Hz = 60 RPM
1 RPM = 1/60 Hz
T = 1/f (saniye)

How to use?

  1. 1
    Enter a value Type in any unit field — Hz, kHz, MHz, GHz or RPM. All other fields update instantly.
  2. 2
    Read the result All six units are shown simultaneously. No need to press Calculate.
  3. 3
    Copy or share Use the Copy button to copy all results to the clipboard, or share the page link.

FAQ

What is the difference between Hz and RPM?
Hertz (Hz) measures cycles per second, while RPM (revolutions per minute) measures rotations per minute. To convert: 1 Hz = 60 RPM, and 1 RPM = 1/60 Hz ≈ 0.01667 Hz. Both describe repetitive periodic motion.
What frequencies do humans hear?
The typical human hearing range is 20 Hz (deep bass) to 20 000 Hz (20 kHz, high treble). As we age, the upper limit decreases. Most speech is concentrated between 300 Hz and 3 400 Hz (telephone quality range).
What is a terahertz (THz)?
One terahertz equals 10¹² Hz — between microwave and infrared light. THz radiation is used in security scanners (airport body scanners), medical imaging, and high-speed wireless research. Visible light frequencies are even higher, in the 430–770 THz range.

Frequency Units Explained

Frequency is the number of complete cycles that occur per unit of time. The SI unit is Hertz (Hz), equal to one cycle per second. Higher-frequency phenomena require kHz, MHz, GHz or THz prefixes.

Everyday Frequency Examples

  • 50–60 Hz: AC mains electricity (50 Hz in Europe/Turkey, 60 Hz in the Americas).
  • 20 Hz – 20 kHz: Human hearing range. Audio equipment is designed for this band.
  • 535 kHz – 1.7 MHz: AM radio broadcast band.
  • 87.5 – 108 MHz: FM radio broadcast band.
  • 2.4 / 5 GHz: Wi-Fi frequency bands.
  • 1–5 GHz: Mobile network (4G/5G) frequencies.

CPU and Digital Electronics

Modern CPUs operate in the 1–5 GHz range. Memory (RAM) operates at 1.6–6.4 GHz effective frequency. GPU shader clocks can exceed 3 GHz. These values describe the clock frequency — the rate at which logic operations are performed.

RPM in Mechanical Systems

Rotational speed (RPM) is linked to frequency: 1 Hz = 60 RPM. A car engine at 3 000 RPM rotates at 50 Hz. HDD spindle speed: 5 400–7 200 RPM = 90–120 Hz.

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