Kilohertz to Hertz
One kilohertz equals 1000 hertz.
Hertz = kilohertz × 1000
Frequency Conversion
Common Frequencies
Frequency Reference Guide
Frequency Unit Relationships
1 kHz = 1,000 Hz
1 MHz = 1,000 kHz = 1,000,000 Hz
1 GHz = 1,000 MHz = 1,000,000,000 Hz
1 THz = 1,000 GHz = 10¹² Hz
1 RPM = 1/60 Hz ≈ 0.0167 Hz
1 RPS = 1 Hz
1 rad/s = 1/(2π) Hz ≈ 0.159 Hz
Angular frequency: ω = 2πf
Frequency Spectrum Applications
Audio Range: 20 Hz - 20 kHz (human hearing)
Radio Waves: 3 kHz - 300 GHz
AM Radio: 535 - 1605 kHz
FM Radio: 88 - 108 MHz
WiFi 2.4GHz: 2.4 - 2.485 GHz
WiFi 5GHz: 5.15 - 5.85 GHz
Microwave: 300 MHz - 300 GHz
Visible Light: ~400 - 800 THz
Technical Applications
CPU Clock: 1-5 GHz (modern processors)
AC Power: 50-60 Hz (mains electricity)
Musical Note A4: 440 Hz (concert pitch)
Ultrasound: >20 kHz (medical imaging)
Radar: 1-100 GHz (various bands)
X-rays: 30 PHz - 30 EHz (10¹⁶-10¹⁹ Hz)
Conversion Tips
• Period (T) and frequency (f) are reciprocals: T = 1/f
• Higher frequency = shorter wavelength (for electromagnetic waves)
• Angular frequency (ω) = 2π × frequency (f)
• Use scientific notation for very large or small frequencies
Kilohertz to Hertz Conversion Table
| kHz | Hz |
|---|---|
| 0.02 | 20 |
| 1 | 1000 |
| 10 | 10000 |
| 20 | 20000 |
| 32.768 | 32768 |
| 44.1 | 44100 |
| 48 | 48000 |
| 100 | 100000 |
| 440 | 440000 |
| 1000 | 1000000 |
| 10000 | 10000000 |
| 20000 | 20000000 |
About This Conversion
Kilohertz to hertz multiplies by 1,000. Audio work needs it constantly, because sample rates are quoted in kilohertz while filter frequencies, tunings and hearing ranges are given in hertz.
The anchors are worth knowing: human hearing spans roughly 20 Hz to 20 kHz, CD audio samples at 44.1 kHz, video audio at 48 kHz, and concert A is 440 Hz. The 32.768 kHz in the table is the quartz crystal in nearly every watch and real-time clock, chosen because 32,768 is 2¹⁵ and divides down to exactly one pulse per second.
Frequently Asked Questions
How many Hz are in a kHz?
One kilohertz is 1,000 hertz.
What is 44.1 kHz in Hz?
44,100 Hz, the CD audio sample rate.
What is the range of human hearing in Hz?
Roughly 20 Hz to 20,000 Hz, narrowing at the top end with age.
Why is 32.768 kHz used in clocks?
It is 2¹⁵ Hz, so fifteen halvings give exactly one pulse per second.