# Megahertz to Kilohertz (MHz to kHz)

> Convert megahertz to kilohertz: 1 MHz = 1000 kHz. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `mhz-to-khz` · Quantity: Frequency (`frequency`, base unit Hz) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/mhz-to-khz · This document: https://tttkmbb.com/conversion/mhz-to-khz.md · JSON: https://tttkmbb.com/conversion/mhz-to-khz.json (add `?value=` for a result)

## Formula

- `1 MHz = 1000 kHz`
- `kilohertz = megahertz × 1000`
- Reverse: `megahertz = kilohertz × 0.001`

The factor follows from the SI definitions of both units (NIST SP 811); values below are rounded to 6 significant figures, the API returns up to 12.

## Worked examples

- 5 MHz = 5000 kHz
- 12.5 MHz = 12500 kHz
- 100 MHz = 100000 kHz

## Conversion table

| Megahertz (MHz) | Kilohertz (kHz) |
| --- | --- |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 4 | 4000 |
| 5 | 5000 |
| 6 | 6000 |
| 7 | 7000 |
| 8 | 8000 |
| 9 | 9000 |
| 10 | 10000 |
| 15 | 15000 |
| 20 | 20000 |
| 25 | 25000 |
| 30 | 30000 |
| 40 | 40000 |
| 50 | 50000 |
| 75 | 75000 |
| 100 | 100000 |
| 200 | 200000 |
| 250 | 250000 |
| 500 | 500000 |
| 1000 | 1000000 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=MHz&to_unit=kHz` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":5,"from_unit":"MHz","to_unit":"kHz"}`
- All frequency units: https://tttkmbb.com/api/v1/units?quantity=frequency · full converter: [Frequency Converter](https://tttkmbb.com/conversion/frequency.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many kilohertz are in one megahertz?**

1 MHz = 1000 kHz. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.

**What is the formula to convert megahertz to kilohertz?**

Multiply the value in megahertz by 1000: kilohertz = megahertz × 1000. For example, 5 MHz = 5000 kHz.

**How do I convert kilohertz back to megahertz?**

Multiply by the inverse factor 0.001 (megahertz = kilohertz × 0.001), or use the kilohertz-to-megahertz page.

## Related conversions

- [Kilohertz to megahertz](https://tttkmbb.com/conversion/khz-to-mhz.md) (reverse)
- [Hertz to Revolutions per minute (rpm)](https://tttkmbb.com/conversion/hz-to-rpm.md)
- [Revolutions per minute (rpm) to Hertz](https://tttkmbb.com/conversion/rpm-to-hz.md)
- [Radians per second to Revolutions per minute (rpm)](https://tttkmbb.com/conversion/rad-per-second-to-rpm.md)
- [Revolutions per minute (rpm) to Radians per second](https://tttkmbb.com/conversion/rpm-to-rad-per-second.md)
- [Gigahertz to Megahertz](https://tttkmbb.com/conversion/ghz-to-mhz.md)
- [Megahertz to Gigahertz](https://tttkmbb.com/conversion/mhz-to-ghz.md)
- [Kilohertz to Hertz](https://tttkmbb.com/conversion/khz-to-hz.md)
- [Hertz to Kilohertz](https://tttkmbb.com/conversion/hz-to-khz.md)

## Data Sources

- NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors — https://www.nist.gov/pml/special-publication-811 (standard, retrieved 2026-09-24)
- BIPM – The International System of Units (SI Brochure, 9th edition) — https://www.bipm.org/en/publications/si-brochure (standard, retrieved 2026-09-24)
- Wikipedia – Conversion of units — https://en.wikipedia.org/wiki/Conversion_of_units (reference, retrieved 2026-09-24)