Frequency Conversion Calculator: Hz, kHz, MHz and GHz

A frequency conversion calculator converts a value from one frequency unit to another, such as hertz to kilohertz, megahertz, or gigahertz. Enter the frequency in hertz and the calculator returns the equivalent value in the other units, making it easier to compare signals, rotations, and repeating events.

Formula

Frequency is converted by multiplying or dividing by powers of ten. The calculator uses these relationships:

• Kilohertz (kHz) = hertz (Hz) ÷ 1,000
• Megahertz (MHz) = hertz (Hz) ÷ 1,000,000
• Gigahertz (GHz) = hertz (Hz) ÷ 1,000,000,000

Here, Hz is the input frequency, measured in cycles per second. The outputs are the same frequency expressed in kHz, MHz, and GHz. The conversions are exact because these units are defined as decimal multiples of the hertz.

Worked Example

With the default input of 1,000 Hz:

• kHz = 1,000 ÷ 1,000 = 1.000 kHz
• MHz = 1,000 ÷ 1,000,000 = 0.001000 MHz
• GHz = 1,000 ÷ 1,000,000,000 = 0.000001000 GHz

All three results describe the same frequency: one thousand cycles per second. Extra zeros shown in the output reflect the selected decimal places, not additional measurement precision.

What Frequency Means

Frequency describes how often a repeating event occurs during a given amount of time. In the International System of Units, the hertz is the standard unit: 1 Hz means one cycle per second. A vibrating object, alternating electrical signal, radio wave, or rotating mechanism can all be described by frequency when their behavior repeats.

Common metric multiples are:

• 1 kilohertz (kHz) = 1,000 Hz
• 1 megahertz (MHz) = 1,000,000 Hz
• 1 gigahertz (GHz) = 1,000,000,000 Hz
• 1 terahertz (THz) = 1,000,000,000,000 Hz

The prefixes are decimal, unlike some computer-storage conventions that use powers of 1,024. For frequency conversions, 1 MHz is exactly 1,000 kHz, not 1,024 kHz. A frequency conversion changes the unit, not the underlying signal or event.

How to Use the Calculator

1. Enter a nonnegative frequency in hertz in the input field.
2. Read the equivalent values in kHz, MHz, and GHz.
3. Choose the output unit that fits the scale of the value you need to report.

If your source value is already in another unit, convert it to hertz first or use the relationships above. For example, 2.4 GHz is 2,400 MHz and 2,400,000,000 Hz. Make sure the input field is understood to be in hertz; entering “2.4” for a value that means 2.4 GHz would instead be interpreted as 2.4 Hz.

Reading Results and Avoiding Mistakes

Choose a unit that keeps the number easy to read. A household-scale electrical frequency is often expressed in hertz, while radio and processor frequencies are commonly presented in MHz or GHz. Very small decimal results do not mean the frequency has changed; they are simply the same quantity represented using a larger unit.

• Check the prefix: kHz, MHz, and GHz differ by factors of 1,000.
• Track the starting unit: A value of 500 MHz is not 500 Hz; it equals 500,000,000 Hz.
• Use enough precision: Rounding can hide meaningful differences in close measurements.
• Distinguish frequency from period: Frequency is cycles per second; period is the time for one cycle.

Conversion itself does not introduce rounding error, but a displayed result may be rounded to a chosen number of decimal places. If you need a precise result for a specification or measurement, retain the original value and its stated precision rather than treating display zeros as measured digits.

Frequency and Period

Frequency and period are reciprocals. If frequency f is measured in hertz, the period T, or time per cycle, is:

T = 1 ÷ f

The period is measured in seconds when frequency is in hertz. For example, a 1,000 Hz signal has a period of 1 ÷ 1,000 = 0.001 seconds, or 1 millisecond. This relationship is useful when a circuit, timer, or waveform is specified by the time between repeated events. It applies to a steady repeating signal; changing or irregular signals may require a more specific measurement method.

Frequently Asked Questions

How many hertz are in a kilohertz?
One kilohertz equals 1,000 hertz. To convert kHz to Hz, multiply by 1,000; to convert Hz to kHz, divide by 1,000.

How do I convert MHz to GHz?
Divide the MHz value by 1,000. For example, 2,400 MHz is 2.4 GHz.

What is 60 Hz in kHz?
Divide 60 by 1,000: 60 Hz equals 0.06 kHz. It remains the same frequency, just written in a different unit.

Is GHz faster than MHz?
GHz is a larger unit, not a different kind of frequency. One GHz equals 1,000 MHz, so a numerical value in GHz represents a higher frequency than the same numerical value in MHz.

Can frequency be negative?
Ordinary frequency, meaning cycles per unit of time, is nonnegative. Some mathematical signal descriptions use signed frequency to indicate direction or phase convention, but that is a specialized representation rather than a negative repetition rate.

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in hz | Frequency | Hz | 1000 | 0
out khz | Kilohertz | kHz | hz / 1000 | 3
out mhz | Megahertz | MHz | hz / 1000000 | 6
out ghz | Gigahertz | GHz | hz / 1000000000 | 9