# Miles per hour to Meters per second (mph to m/s)

> Convert miles per hour to meters per second: 1 mph = 0.44704 m/s. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `mph-to-meters-per-second` · Quantity: Speed (`speed`, base unit m/s) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/mph-to-meters-per-second · This document: https://tttkmbb.com/conversion/mph-to-meters-per-second.md · JSON: https://tttkmbb.com/conversion/mph-to-meters-per-second.json (add `?value=` for a result)

## Formula

- `1 mph = 0.44704 m/s`
- `meters per second = miles per hour × 0.44704`
- Reverse: `miles per hour = meters per second × 2.236936292`

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 mph = 2.2352 m/s
- 12.5 mph = 5.588 m/s
- 100 mph = 44.704 m/s

## Conversion table

| Miles per hour (mph) | Meters per second (m/s) |
| --- | --- |
| 1 | 0.44704 |
| 2 | 0.89408 |
| 3 | 1.34112 |
| 4 | 1.78816 |
| 5 | 2.2352 |
| 6 | 2.68224 |
| 7 | 3.12928 |
| 8 | 3.57632 |
| 9 | 4.02336 |
| 10 | 4.4704 |
| 15 | 6.7056 |
| 20 | 8.9408 |
| 25 | 11.176 |
| 30 | 13.4112 |
| 40 | 17.8816 |
| 50 | 22.352 |
| 75 | 33.528 |
| 100 | 44.704 |
| 200 | 89.408 |
| 250 | 111.76 |
| 500 | 223.52 |
| 1000 | 447.04 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=mph&to_unit=m%2Fs` → 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":"mph","to_unit":"m/s"}`
- All speed units: https://tttkmbb.com/api/v1/units?quantity=speed · full converter: [Speed Converter](https://tttkmbb.com/conversion/speed.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many meters per second are in one mile per hour?**

1 mph = 0.44704 m/s. 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 miles per hour to meters per second?**

Multiply the value in miles per hour by 0.44704: meters per second = miles per hour × 0.44704. For example, 5 mph = 2.2352 m/s.

**How do I convert meters per second back to miles per hour?**

Multiply by the inverse factor 2.236936292 (miles per hour = meters per second × 2.236936292), or use the meters per second-to-miles per hour page.

## Related conversions

- [Meters per second to miles per hour](https://tttkmbb.com/conversion/meters-per-second-to-mph.md) (reverse)
- [Kilometers per hour to Miles per hour](https://tttkmbb.com/conversion/kmh-to-mph.md)
- [Miles per hour to Kilometers per hour](https://tttkmbb.com/conversion/mph-to-kmh.md)
- [Meters per second to Kilometers per hour](https://tttkmbb.com/conversion/meters-per-second-to-kmh.md)
- [Kilometers per hour to Meters per second](https://tttkmbb.com/conversion/kmh-to-meters-per-second.md)
- [Knots to Kilometers per hour](https://tttkmbb.com/conversion/knots-to-kmh.md)
- [Kilometers per hour to Knots](https://tttkmbb.com/conversion/kmh-to-knots.md)
- [Knots to Miles per hour](https://tttkmbb.com/conversion/knots-to-mph.md)
- [Miles per hour to Knots](https://tttkmbb.com/conversion/mph-to-knots.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)