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Hertz to megahertz: exact SI ladder, RF and clock context, conversion chart, and practical tips
Conversion formula
Verification: factors follow standard unit definitions; round for display only.
Quick reference chart
| Hertz | Megahertz |
|---|---|
| 1 | 0.000001 |
| 2 | 0.000002 |
| 3 | 0.000003 |
| 4 | 0.000004 |
| 5 | 0.000005 |
| 6 | 0.000006 |
Educational explanation
Hertz to megahertz
Convert Hz to MHz when a crystal datasheet, PLL register dump, or vibration sensor lists hertz but an FM radio dial, microcontroller clock tree, or RF filter spec quotes megahertz.
Hertz (Hz) counts cycles per second; megahertz (MHz) applies the SI mega prefix. On this catalog 1 MHz = 1,000,000 Hz (Megahertz: 1e6, Hertz: 1).
MHz = Hz ÷ 1,000,000 · equivalently Hz = MHz × 1,000,000
Step-by-step conversion (worked example — 88.5 MHz FM)
Express the FM station center in base hertz:
- 88.5 × 1,000,000 = 88,500,000 Hz
- Reverse check (this page's primary): 88,500,000 ÷ 1,000,000 = 88.5 MHz
Second worked example (16 MHz MCU crystal)
- 16,000,000 Hz ÷ 1,000,000 = 16 MHz
Third worked example (60 Hz mains — wrong scale)
60 Hz power: 60 ÷ 1,000,000 = 0.00006 MHz—use hertz or kilohertz tools for utility frequencies, not megahertz labels.
Quick mental estimate
Drop six zeros (divide by 10⁶) when moving Hz → MHz. Example: 1,000,000 Hz → 1 MHz.
Hertz to megahertz conversion chart
| Hertz (Hz) | Megahertz (MHz) | Typical context |
|---|---|---|
| 1,000,000 Hz | 1 MHz | Definition anchor |
| 16,000,000 Hz | 16 MHz | Classic 8051 / AVR crystal class |
| 88,500,000 Hz | 88.5 MHz | FM broadcast band (regional) |
| 100,000,000 Hz | 100 MHz | RF test gear, oscilloscope bandwidth reference |
| 433,920,000 Hz | 433.92 MHz | ISM short-range radio (EU) |
Where Hz → MHz comes up
- Embedded clocks: Register maps in Hz; schematics and BOM lines in MHz.
- FM/RF compliance: Spur tables in Hz; channel plans in MHz.
- Spectrum analyzers: Marker readouts toggle Hz vs MHz per span setting.
Megahertz to hertz
Convert MHz to Hz when a radio dial or MCU sticker lists megahertz but your FFT, oscilloscope, or PLL equation expects base hertz.
Hz = MHz × 1,000,000
Step-by-step conversion (worked example)
Convert 27 MHz CB radio channel to hertz for a synthesizer word:
- 27 × 1,000,000 = 27,000,000 Hz
Quick reference (MHz → Hz)
| Megahertz (MHz) | Hertz (Hz) | Typical context |
|---|---|---|
| 1 MHz | 1,000,000 Hz | Anchor |
| 10 MHz | 10,000,000 Hz | Reference oscillator |
| 88.5 MHz | 88,500,000 Hz | FM station |
| 100 MHz | 100,000,000 Hz | Scope / probe class |
MHz vs kHz vs GHz, period relationship, and related tools
Confirm you are on the right SI rung before converting. Period T = 1/f when f is in hertz.
Common mistakes to avoid
- Off-by-three or six zeros between Hz, kHz, and MHz.
- Confusing MHz with Mbps (megabits per second)—different quantity.
- Using MHz labels for sub-kHz audio—440 Hz is 0.00044 MHz, not 440 MHz.
Related converters
hertz to kilohertz, kilohertz to megahertz, hertz to gigahertz, gigahertz to megahertz, and hertz to RPM.
Frequently asked questions
What is the formula to convert hertz to megahertz?
MHz = Hz ÷ 1,000,000. Example: 16,000,000 Hz = 16 MHz.
What is the formula to convert megahertz to hertz?
Hz = MHz × 1,000,000. Example: 88.5 MHz = 88,500,000 Hz.
How many hertz are in 1 megahertz?
Exactly 1,000,000 Hz per MHz—the SI mega prefix is 10⁶.
What is 16 MHz in hertz?
16,000,000 Hz—a common microcontroller crystal frequency.
What is 88,500,000 Hz in megahertz?
88.5 MHz—typical FM broadcast channel spacing context.
Is the Hz-to-MHz conversion exact?
Yes—pure SI prefix math with no empirical constant.
How do I get period from MHz?
Convert to Hz first (× 1,000,000), then T = 1/Hz. Example: 1 MHz → T = 1 µs.
Is FM radio in MHz or Hz?
Consumer dials show MHz (e.g., 101.1 MHz). Engineering spur tables often use Hz.
How does MHz relate to GHz?
1 GHz = 1,000 MHz. Use gigahertz-to-megahertz when crossing that rung.
How do I validate a spreadsheet?
Convert 16,000,000 Hz → 16 MHz → 16,000,000 Hz round-trip.
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