Kilohertz to Hertz
Free instant kilohertz to hertz converter. 1 kHz = 1000 Hz.
Common Kilohertz to Hertz values
| Kilohertz (kHz) | Hertz (Hz) |
|---|---|
| 1 | 1000 |
| 5 | 5000 |
| 10 | 10000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 500 | 500000 |
| 1000 | 1000000 |
How does Kilohertz to Hertz conversion work?
Type a value in the Kilohertz (kHz) field and the equivalent in Hertz (Hz) appears instantly to the right. The math uses the exact formula shown above โ no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Kilohertz. One thousand hertz. Audio sample rates (44.1 kHz for CD, 48 kHz for DAW) live here. AM radio is in the kHz band.
Hertz. The SI unit of frequency. 1 Hz = 1 cycle per second. Human-audible range: 20 Hz to 20 kHz.
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No submit button โ the result updates as you type. Math runs entirely in your browser, so itโs as fast as your device.
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Works in any modern browser โ Mac, Windows, Linux, iPhone, Android, tablets. No installation, no signup.
๐ฏ Accurate conversions
Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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How it works โ the formula
1 Hz = 1 cycle / second
1 kHz = 10ยณ Hz
1 MHz = 10โถ Hz
1 GHz = 10โน Hz
1 BPM (beat per minute) = 1/60 HzThe hertz is the SI unit of frequency (cycles per second), named after Heinrich Hertz who demonstrated electromagnetic waves in 1888. SI decimal prefixes (k/M/G/T) apply directly. Beats per minute (BPM) is the music / cardiology unit: a 60 BPM heartbeat is exactly 1 Hz. RPM (revolutions per minute, used for rotating machinery) is the same factor 1 RPM = 1/60 Hz. The CGPM 1960 standardised the hertz as part of SI; before that "cycles per second" was the prevailing usage.
Worked examples
- Inputs:
- 120 BPM = ? Hz
- Output:
- 120 / 60 = 2 Hz
- Inputs:
- 2.4 GHz = ? Hz
- Output:
- 2.4 ร 10โน = 2,400,000,000 Hz
- Inputs:
- 72 BPM = ? Hz
- Output:
- 72 / 60 = 1.2 Hz
Limitations
- Angular frequency (ฯ, in rad/s) differs from cyclic frequency (f, in Hz) by a factor of 2ฯ โ physics formulas often use ฯ, but Hz is the everyday unit.
- BPM and RPM both = 1/60 Hz โ mathematically identical; the difference is convention (music/heart vs rotating machinery).
- Audio frequencies (20 Hz - 20 kHz) and radio frequencies (kHz to GHz) span 8 orders of magnitude โ be careful with prefix choice.
- Spectrum-allocation conventions sometimes use wavelength (1 m = 300 MHz, by c = ฮปf) instead of frequency.
Conversions are exact rational arithmetic โ all SI-prefix conversions are exact powers of 10, and BPMโHz is exactly 1/60.