Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
Gigahertz to Megahertz Converter
1 GHz = 1,000 MHz. Enter a value to convert GHz to MHz, then use the formula and table below. Displayed digits may be rounded.
FrequencyInstant result
Decimals
Formula result = input × 1000000000 ÷ 1000000. 1 GHz = 1,000 MHz
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
Common examples
One value, several units
Hertz1,000,000,000 Hz
Kilohertz1,000,000 kHz
Megahertz1,000 MHz
Revolutions per minute60,000,000,000 rpm
Conversion table
| GHz | MHz |
|---|---|
| 1 GHz | 1,000 MHz |
| 2 GHz | 2,000 MHz |
| 5 GHz | 5,000 MHz |
| 10 GHz | 10,000 MHz |
| 25 GHz | 25,000 MHz |
| 50 GHz | 50,000 MHz |
| 100 GHz | 100,000 MHz |
Conversion chart
1 GHz1,000 MHz
5 GHz5,000 MHz
10 GHz10,000 MHz
25 GHz25,000 MHz
50 GHz50,000 MHz
Worked example
1 GHz = 1,000 MHz. Apply the selected conversion formula to other input values.
Unit definition
Gigahertz (GHz) One gigahertz equals 1,000,000,000 hertz.
Unit history
Gigahertz is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert GHz to hertz.
3. Convert the base value to MHz and apply your display precision.
Understand the result before using it
Gigahertz to Megahertz converts a value measured in Gigahertz (GHz) into the equivalent value in Megahertz (MHz). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1000000000 ÷ 1000000
Assumptions
- Gigahertz and Megahertz represent the same frequency quantity.
- The input is expressed in GHz; the output is expressed in MHz.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 GHz = 1,000 MHz. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a GHz measurement in a document that expects MHz.
- Compare a gigahertz value with a value reported in megahertz.
- Check the GHz to MHz arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse GHz with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Gigahertz to Megahertz?
result = input × 1000000000 ÷ 1000000. Input is in GHz; result is in MHz. 1 GHz = 1,000 MHz. The displayed digits may be rounded.
What is 1 GHz in MHz?
1 GHz = 1,000 MHz. The displayed digits may be rounded.
Can I reverse the GHz to MHz conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts MHz back to GHz.
Is the Gigahertz to Megahertz result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.