Megahertz to hertz (MHz to Hz) converter

What is a megahertz to hertz converter?

A megahertz to hertz converter is an online tool that lets you translate a frequency expressed in megahertz (MHz) into its equivalent value in hertz (Hz), and back again. Both units measure the same physical quantity — frequency, the number of cycles or oscillations that occur every second — but at very different scales. The hertz is the base SI unit of frequency, while the megahertz is simply one million hertz, a more convenient size for describing radio waves, processor clocks, and similar fast signals.

Because the two units differ only by a power of ten, the conversion is purely a matter of moving the decimal point. The converter handles that arithmetic for you and also accepts the neighbouring units kilohertz (kHz) and gigahertz (GHz), so you can move freely across the whole frequency scale.

How does the converter work?

The tool shows two fields. Whatever you type into one field is instantly converted and shown in the other, so you can read the result without pressing any button. Each field has a unit selector, which means you are not limited to megahertz and hertz: you can choose kilohertz or gigahertz on either side and the converter will adjust the factor automatically.

Internally every value is first reduced to plain hertz and then scaled up to the target unit. This single common reference is what makes the bidirectional conversion exact and consistent no matter which units you pick.

Formula for conversion

The relationship between the SI frequency units follows the standard metric prefixes:

$1\ \text{kHz} = 10^{3}\ \text{Hz}, \quad 1\ \text{MHz} = 10^{6}\ \text{Hz}, \quad 1\ \text{GHz} = 10^{9}\ \text{Hz}$

To convert megahertz to hertz, multiply by one million:

$\text{Hz} = \text{MHz} \times 1{,}000{,}000$

To convert hertz back to megahertz, divide by one million:

$\text{MHz} = \text{Hz} \div 1{,}000{,}000$

And for kilohertz, the factor to hertz is one thousand:

$\text{Hz} = \text{kHz} \times 1{,}000$

Conversion table

The table below lists common megahertz values and their equivalents in hertz, kilohertz, and gigahertz.

Examples

Example 1: Convert 1 MHz to hertz

Multiply the value in megahertz by one million:

$1\ \text{MHz} \times 1{,}000{,}000 = 1{,}000{,}000\ \text{Hz}$

So a 1 MHz signal oscillates one million times per second.

Example 2: Convert 2,000,000 Hz back to megahertz

Divide the value in hertz by one million:

$2{,}000{,}000\ \text{Hz} \div 1{,}000{,}000 = 2\ \text{MHz}$

A two-megahertz signal therefore corresponds to two million hertz.

Example 3: Convert 5 MHz to hertz

$5\ \text{MHz} \times 1{,}000{,}000 = 5{,}000{,}000\ \text{Hz}$

Example 4: Convert 3 kHz to hertz

If you switch the source unit to kilohertz, the converter multiplies by one thousand instead:

$3\ \text{kHz} \times 1{,}000 = 3{,}000\ \text{Hz}$

Notes

• All four units (Hz, kHz, MHz, GHz) describe the same quantity and differ only by powers of ten, so conversions never lose precision.
• Megahertz are most common when discussing radio frequencies, AM/FM broadcasting, and older processor clock speeds; hertz appears wherever very low frequencies such as mains power (50 or 60 Hz) are involved.
• Remember the chain of factors: 1 GHz = 1,000 MHz = 1,000,000 kHz = 1,000,000,000 Hz.
• A zero input simply returns zero, and clearing both fields leaves the converter blank.

Frequently asked questions

How many hertz are in 1 megahertz?

There are exactly 1,000,000 hertz in one megahertz, because the prefix “mega” means one million.

How do I convert hertz to megahertz?

Divide the number of hertz by 1,000,000. For example, 2,000,000 Hz divided by one million equals 2 MHz.

What is the difference between megahertz and gigahertz?

A gigahertz is one thousand times larger than a megahertz: 1 GHz equals 1,000 MHz, or 1,000,000,000 Hz. Gigahertz is typically used for modern processor speeds and high-frequency radio bands.

Can this converter handle kilohertz and gigahertz?

Yes. Each field has a unit selector, so you can choose hertz, kilohertz, megahertz, or gigahertz on either side and the converter applies the correct factor automatically.

Why is my result so large when converting MHz to Hz?

Because one megahertz already equals a million hertz, even small megahertz values produce large hertz figures. Converting 5 MHz, for instance, gives 5,000,000 Hz.

Is the conversion between MHz and Hz exact?

Yes. Since the units differ only by a power of ten, the conversion involves no rounding and is mathematically exact.