Convert Megahertz to Gigahertz - Frequency Converter
This tool converts frequency values from megahertz (MHz) to gigahertz (GHz) using the International System of Units (SI) decimal prefixes. The relationship between these units is exact under SI rules, so results are deterministic and suitable for engineering, lab, and documentation purposes.
Use this converter for single-value conversions, quick checks when specifying RF components, test reports, documentation, or scripting. For measurement traceability or regulatory compliance, see the methodology and citations for authoritative references and guidance on calibration and exposure limits.
Governance
Record c7ac9aa91dc3 • Reviewed by Fidamen Standards Committee
Interactive Converter
Convert between megahertz and gigahertz with precision rounding.
Quick reference table
| Megahertz | Gigahertz |
|---|---|
| MHZ 1.00 MHz | GHZ 0.00 GHz |
| MHZ 5.00 MHz | GHZ 0.01 GHz |
| MHZ 10.00 MHz | GHZ 0.01 GHz |
| MHZ 25.00 MHz | GHZ 0.03 GHz |
| MHZ 50.00 MHz | GHZ 0.05 GHz |
| MHZ 100.00 MHz | GHZ 0.10 GHz |
Methodology
SI prefix definitions determine the conversion. 'mega' denotes 10^6 and 'giga' denotes 10^9, so the conversion factor between MHz and GHz is a power-of-ten ratio. This is an exact arithmetic relationship defined by international metrology authorities.
When converting measured frequencies, consider instrument resolution, stability, and calibration traceability. Frequency counters, spectrum analyzers, and synthesizers report values with instrument-dependent uncertainty; convert the reported numeric value exactly, then present uncertainty according to your lab's calibration certificate or metrology guidance (traceable to national labs such as NIST).
For regulatory or safety work (for example, interpreting RF exposure guidelines or frequency allocations), use converted values together with official documents from regulatory agencies to ensure compliance. Conversion does not change the measurement uncertainty or regulatory status of a signal.
Key takeaways
MHz to GHz conversion is an exact SI-prefix arithmetic operation: divide MHz by 1000 to get GHz.
Apply measurement best practices: preserve instrument significant figures, carry uncertainties with traceability, and consult regulatory documents for compliance.
Worked examples
Convert 1200 MHz: 1200 ÷ 1000 = 1.2 GHz.
Convert 0.5 MHz: 0.5 ÷ 1000 = 0.0005 GHz.
Convert 5800 MHz: 5800 ÷ 1000 = 5.8 GHz.
F.A.Q.
What is the exact relationship between MHz and GHz?
1 GHz equals 1000 MHz. This is an exact SI-based relationship because giga is 10^9 and mega is 10^6, so the ratio between them is 10^3.
How should I handle significant figures and rounding after conversion?
Perform the arithmetic exactly, then round only for display according to your context. For measurements, preserve the instrument's reported significant figures and convert the uncertainty terms per your lab's uncertainty propagation practices. If in doubt, keep one or two guard digits beyond required reporting precision.
Does conversion change measurement uncertainty or calibration status?
No. Converting the numeric value does not change the underlying measurement uncertainty, traceability, or calibration status. Always report the original instrument uncertainty and, if needed, propagate uncertainty numerically when converting units.
Which instruments measure frequency and what calibration should I expect?
Common instruments include frequency counters, spectrum analyzers, and phase-locked sources. Calibration should be traceable to a national metrology institute (for example, NIST in the United States) and include stated uncertainty. Refer to your calibration laboratory certificate for specifics.
Are there regulatory or safety implications when converting frequencies?
Conversion itself has no regulatory effect, but correctly converted frequencies are essential when checking frequency allocations, licensing, and RF exposure rules. Always consult the relevant regulatory body's documentation for compliance thresholds and permitted bands.
Can I convert large lists or use this in scripts?
This converter is intended for single-value interactive conversions. For batch or automated conversions, apply the same arithmetic rule (GHz = MHz / 1000) in your script or spreadsheet, and manage formatting and significant-figure rules in code.
Sources & citations
- BIPM — SI units and prefixes — https://www.bipm.org/en/measurement-units/si
- NIST — SI Units and Conventions — https://www.nist.gov/pml/weights-and-measures/si-units
- NIST Time and Frequency Division (measurement traceability and standards) — https://www.nist.gov/pml/time-and-frequency-division
- FCC — Radio Frequency Safety and frequency allocation information — https://www.fcc.gov/general/radio-frequency-safety
- MIT OpenCourseWare — foundational signals and systems resources — https://ocw.mit.edu
- ISO 80000-3:2019 — Space and time — https://www.iso.org/standard/64974.html
- BIPM SI Brochure (9th edition, 2019) — https://www.bipm.org/en/publications/si-brochure
Further resources
Related tools
External guidance
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: c7ac9aa91dc3What changed (latest)
v1.0.0 • 2025-11-17 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-17 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 17, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-17 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: 1c1d1b54880a
- https://ocw.mit.edu
- https://www.bipm.org/en/measurement-units/si
- https://www.bipm.org/en/publications/si-brochure
- https://www.fcc.gov/general/radio-frequency-safety
- https://www.iso.org/standard/64974.html
- https://www.nist.gov/pml/time-and-frequency-division
- https://www.nist.gov/pml/weights-and-measures/si-units