kHz to Hz Converter

How to convert kilohertz to hertz?

To convert kilohertz to hertz, multiply by 1,000. The kilo- prefix is defined as exactly 10^3 by the BIPM, and the hertz itself is fixed by the atomic-clock-based definition of the second. The conversion is exact, dimensionless, and uses BigNumber arithmetic to preserve precision.

f_(Hz) = f_(kHz) × 1,000

Example

Convert 20 kilohertz to hertz:

f_(Hz) = 20kHz × 1,000 = 20,000Hz

How many hertz in a kilohertz?

Exactly 1,000 Hz, by SI definition of the kilo- prefix.

1 kHz = 1,000 Hz

1kHz = 1,000Hz

How many kilohertz in a hertz?

Exactly 0.001 kHz, or 10^-3.

1 Hz = 0.001 kHz

1Hz = 0.001kHz

What is the SI definition of hertz?

The hertz (Hz), named after physicist Heinrich Rudolf Hertz, is the SI unit of frequency, defined as one cycle (or one event) per second. Since the 2019 SI redefinition, it inherits its precision directly from the caesium-133 hyperfine transition fixed at 9,192,631,770 Hz.

What uses kHz frequencies?

Common domains include AM radio (540–1,600 kHz), professional audio sample rates (44.1, 48, 96, 192 kHz), ultrasonic sensors (40 kHz parking radar), switch-mode power supplies (20–100 kHz), VLF naval communications, and lab oscillators.

Why convert kHz to Hz?

Most low-level DSP code, SPICE simulators, and oscilloscope firmware use Hz as the canonical unit. When you read a datasheet that says '40 kHz typical' but your simulator field expects Hz, you need the conversion. The conversion is also useful when comparing across SI prefixes — putting everything in Hz lets you compare 50 Hz mains hum against 5 kHz switching ripple on the same axis.

Popular kilohertz to hertz conversion table