My router says it runs on the 2.4 GHz band. Is that the same as 2,400 MHz, and how many hertz is that?

Yes, 2.4 GHz = 2,400 MHz = 2,400,000,000 Hz (2.4 billion hertz). GHz, MHz, and Hz all describe the same frequency — just at different scales. Most consumer specs use GHz because it keeps the number small and readable.

I'm writing code that controls an oscillator and the library requires frequency in Hz. My datasheet shows 27 MHz — what value do I pass?

Pass 27,000,000. Multiply MHz by 1,000,000 to get Hz. For 27 MHz: 27 × 1,000,000 = 27,000,000 Hz. Watch for integer overflow if you're using a 16-bit integer type — use 32-bit or 64-bit for large Hz values.

I was tuning my car radio and noticed AM stations are listed around 850 kHz but FM stations are around 96.5 MHz — why such different numbers if they're both radio?

AM radio operates in the 540–1700 kHz range (0.54–1.7 MHz), while FM uses 87.5–108 MHz — about 100× higher. Higher frequency = shorter wavelength = better audio fidelity, which is why FM sounds cleaner. The different scale labels simply reflect which range is most convenient to express those frequencies.

A CPU is advertised as running at 3,600 MHz. Is that 3.6 GHz, and how many hertz is it?

Exactly right. 3,600 MHz = 3.6 GHz = 3,600,000,000 Hz. Modern processors oscillate 3.6 billion times per second. Manufacturers sometimes list speeds in MHz to make the number look larger in marketing materials, but the unit is equivalent. See [MHz to GHz](/frequency/mhz-to-ghz/) for that conversion.

Megahertz (MHz) to Hertz (Hz) Converter

Enter a value to instantly convert between frequency units.

From

Precision4 dp

1 Megahertz = 1000000 Hertz

Key Formulas

Hertz → Kilohertz

kHz = Hz × 0.001

Kilohertz → Hertz

Hz = kHz × 1000

Megahertz → Gigahertz

GHz = MHz × 0.001

Gigahertz → Megahertz

MHz = GHz × 1000

Formula

Hz = MHz × 1,000,000

Hertz measures how many cycles per second a wave or oscillation completes — it's the base SI unit of frequency. Megahertz (MHz) is a million hertz, the scale used for FM radio, modern CPUs, and many wireless bands. Engineers and software tools working with signal processing, oscillators, or hardware timers often need the raw hertz value to plug into formulas.

Source: NIST SP 811, Table B.8

Frequently Asked Questions

Real-World Examples

An FM radio station broadcasts at 100 MHz; a signal processing textbook problem asks students to express this frequency in hertz for use in a wave equation.

100 MHz = 100000000 Hz

Antenna designers and RF engineers express the 2.4 GHz WiFi carrier as 2,400,000,000 Hz when working with wave equations.

2400 MHz = 2400000000 Hz

The NTSC color subcarrier frequency is 3.58 MHz; electronics hobbyists restoring vintage TVs convert it to 3,580,000 Hz to program replacement oscillator chips.

3.58 MHz = 3580000 Hz

The 433 MHz ISM band is used by remote controls and IoT sensors; an RF library function expects the carrier frequency in hertz, so 433 MHz becomes 433,000,000 Hz.

433 MHz = 433000000 Hz

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Megahertz (MHz) to Hertz (Hz) Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

Related Converters