# Miles to Feet (mi to ft)

> Convert miles to feet: 1 mi = 5280 ft. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.

- Page id: `miles-to-feet` · Quantity: Length (`length`, base unit m) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/miles-to-feet · This document: https://tttkmbb.com/conversion/miles-to-feet.md · JSON: https://tttkmbb.com/conversion/miles-to-feet.json (add `?value=` for a result)

## Formula

- `1 mi = 5280 ft`
- `feet = miles × 5280`
- Reverse: `miles = feet × 0.0001893939394`

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 mi = 26400 ft
- 12.5 mi = 66000 ft
- 100 mi = 528000 ft

## Conversion table

| Miles (mi) | Feet (ft) |
| --- | --- |
| 1 | 5280 |
| 2 | 10560 |
| 3 | 15840 |
| 4 | 21120 |
| 5 | 26400 |
| 6 | 31680 |
| 7 | 36960 |
| 8 | 42240 |
| 9 | 47520 |
| 10 | 52800 |
| 15 | 79200 |
| 20 | 105600 |
| 25 | 132000 |
| 30 | 158400 |
| 40 | 211200 |
| 50 | 264000 |
| 75 | 396000 |
| 100 | 528000 |
| 200 | 1056000 |
| 250 | 1320000 |
| 500 | 2640000 |
| 1000 | 5280000 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=mi&to_unit=ft` → 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":"mi","to_unit":"ft"}`
- All length units: https://tttkmbb.com/api/v1/units?quantity=length · full converter: [Length Converter](https://tttkmbb.com/conversion/length.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**How many feet are in one mile?**

1 mi = 5280 ft. 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 to feet?**

Multiply the value in miles by 5280: feet = miles × 5280. For example, 5 mi = 26400 ft.

**How do I convert feet back to miles?**

Multiply by the inverse factor 0.0001893939394 (miles = feet × 0.0001893939394), or use the feet-to-miles page.

## Related conversions

- [Feet to miles](https://tttkmbb.com/conversion/feet-to-miles.md) (reverse)
- [Kilometers to Miles](https://tttkmbb.com/conversion/km-to-miles.md)
- [Miles to Kilometers](https://tttkmbb.com/conversion/miles-to-km.md)
- [Meters to Feet](https://tttkmbb.com/conversion/meters-to-feet.md)
- [Feet to Meters](https://tttkmbb.com/conversion/feet-to-meters.md)
- [Centimeters to Inches](https://tttkmbb.com/conversion/cm-to-inches.md)
- [Inches to Centimeters](https://tttkmbb.com/conversion/inches-to-cm.md)
- [Millimeters to Inches](https://tttkmbb.com/conversion/mm-to-inches.md)
- [Inches to Millimeters](https://tttkmbb.com/conversion/inches-to-mm.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)