A datalogging tool reports my oscillator frequency as 100,000,000 Hz. What is that in GHz for comparison to RF specs?

100,000,000 Hz = 0.1 GHz (or 100 MHz). Divide by 1,000,000,000. This is a common reference oscillator frequency — you'll more often see it expressed as 100 MHz in RF documentation.

My ADC datasheet says maximum sample rate is 3,200,000,000 Hz. Is that the same as 3.2 GHz?

Yes exactly. 3,200,000,000 Hz ÷ 1,000,000,000 = 3.2 GHz. High-speed ADCs in this range are used in 5G base stations and wide-bandwidth oscilloscopes.

Why do CPU manufacturers use GHz instead of Hz for clock speeds?

Modern CPUs run at billions of cycles per second, so Hz produces unwieldy 10-digit numbers. GHz compresses 3,600,000,000 Hz to 3.6 GHz — easier to compare and market. The underlying physics is identical; only the unit scale changes.

I see a GPS signal described as 1,575,420,000 Hz in a research paper. How do I express that in GHz for a spectrum plot?

1,575,420,000 Hz = 1.57542 GHz. This is the GPS L1 C/A signal. Divide by 1,000,000,000. On spectrum plots, it is almost always labeled 1.575 GHz. See also: GHz to Hz .

Hertz (Hz) to Gigahertz (GHz) Converter

Enter a value to instantly convert between frequency units.

From

Precision4 dp

1 Hertz = 1.0000e-9 Gigahertz

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

GHz = Hz ÷ 1,000,000,000

When a datasheet or firmware register gives you a raw cycle count in Hz and you need to compare it to a CPU spec or Wi-Fi band listed in GHz, divide by one billion. A crystal oscillator rated at 100,000,000 Hz is a 0.1 GHz (100 MHz) reference. An ADC sampling at 4,000,000,000 Hz is a 4 GHz device. Converting Hz to GHz lets you match values across spec sheets that use different unit scales.

Source: NIST SP 811, Table B.8

Frequently Asked Questions

Real-World Examples

Wi-Fi 2.4 GHz band. A firmware register reporting the channel center frequency in Hz gives 2,400,000,000 Hz = 2.4 GHz.

2400000000 Hz = 2.4 GHz

3.6 GHz CPU base clock. Benchmarking tools that report clock speed in Hz show 3,600,000,000 Hz for a mid-range desktop processor.

3600000000 Hz = 3.6 GHz

Exactly 1 GHz. An oscillator producing 1,000,000,000 Hz is a 1 GHz reference clock, common in network timing and RF test equipment.

1000000000 Hz = 1 GHz

5 GHz Wi-Fi band. Dual-band routers broadcast on both 2.4 GHz and 5 GHz simultaneously to balance range and throughput.

5000000000 Hz = 5 GHz

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Hertz (Hz) to Gigahertz (GHz) Converter

Key Formulas

Formula

Frequently Asked Questions

Real-World Examples

Related Converters