# Liters per 100 km to Miles per imperial gallon (UK mpg) (L/100km to mpg (UK))

> Convert liters per 100 km to miles per imperial gallon (UK mpg) with the formula mpg (UK) = 282.480936 / (L/100km). Conversion table and worked examples, with JSON API and MCP access.

- Page id: `l-per-100km-to-mpg-uk` · Quantity: Fuel economy (`fuel-economy`, base unit L/100km) · Tool: `convert_units`
- Canonical page: https://tttkmbb.com/conversion/l-per-100km-to-mpg-uk · This document: https://tttkmbb.com/conversion/l-per-100km-to-mpg-uk.md · JSON: https://tttkmbb.com/conversion/l-per-100km-to-mpg-uk.json (add `?value=` for a result)

## Formula

- `mpg (UK) = 282.480936 / (L/100km)`
- `mpg (UK) = 282.480936 / (L/100km)`
- Reverse: `L/100km = 282.480936 / mpg (UK)`

Non-linear conversion: apply the formula directly; there is no single multiplication factor.

## Worked examples

- 7.5 L/100km = 37.6641 mpg (UK)
- 30 L/100km = 9.41603 mpg (UK)
- 45 L/100km = 6.27735 mpg (UK)

## Conversion table

| Liters per 100 km (L/100km) | Miles per imperial gallon (UK mpg) (mpg (UK)) |
| --- | --- |
| 3 | 94.1603 |
| 4 | 70.6202 |
| 5 | 56.4962 |
| 6 | 47.0802 |
| 7 | 40.3544 |
| 8 | 35.3101 |
| 9 | 31.3868 |
| 10 | 28.2481 |
| 12 | 23.5401 |
| 15 | 18.8321 |
| 20 | 14.124 |
| 25 | 11.2992 |
| 30 | 9.41603 |
| 35 | 8.07088 |
| 40 | 7.06202 |
| 45 | 6.27735 |
| 50 | 5.64962 |
| 60 | 4.70802 |
| 70 | 4.03544 |
| 80 | 3.53101 |
| 100 | 2.82481 |

## API

- `GET https://tttkmbb.com/api/v1/convert?value=7.5&from_unit=L%2F100km&to_unit=mpg_uk` → unified JSON envelope with `result.values.result`, `formula`, `factor`, `sources`, `freshness`
- MCP: server `https://tttkmbb.com/mcp`, tool `convert_units` with `{"value":7.5,"from_unit":"L/100km","to_unit":"mpg_uk"}`
- All fuel economy units: https://tttkmbb.com/api/v1/units?quantity=fuel-economy · full converter: [Fuel Economy Converter](https://tttkmbb.com/conversion/fuel-economy.md)
- Authentication: none. Freshness: `static` (fixed conversion factors).

## FAQ

**What is the formula to convert liters per 100 km to miles per imperial gallon (UK mpg)?**

mpg (UK) = 282.480936 / (L/100km). For example, 7.5 L/100km = 37.6641 mpg (UK).

**How do I convert miles per imperial gallon (UK mpg) back to liters per 100 km?**

L/100km = 282.480936 / mpg (UK); the miles per imperial gallon (UK mpg)-to-liters per 100 km page applies it directly.

**Why is there no single multiplication factor?**

Fuel-economy units are reciprocal (distance per volume versus volume per distance), so the conversion divides a constant by the value instead of multiplying.

## Related conversions

- [Miles per imperial gallon (UK mpg) to liters per 100 km](https://tttkmbb.com/conversion/mpg-uk-to-l-per-100km.md) (reverse)
- [Miles per US gallon (mpg) to Liters per 100 km](https://tttkmbb.com/conversion/mpg-to-l-per-100km.md)
- [Liters per 100 km to Miles per US gallon (mpg)](https://tttkmbb.com/conversion/l-per-100km-to-mpg.md)
- [Kilometers per liter to Liters per 100 km](https://tttkmbb.com/conversion/km-per-liter-to-l-per-100km.md)
- [Liters per 100 km to Kilometers per liter](https://tttkmbb.com/conversion/l-per-100km-to-km-per-liter.md)
- [Miles per US gallon (mpg) to Kilometers per liter](https://tttkmbb.com/conversion/mpg-to-km-per-liter.md)
- [Kilometers per liter to Miles per US gallon (mpg)](https://tttkmbb.com/conversion/km-per-liter-to-mpg.md)
- [Miles per US gallon (mpg) to Miles per imperial gallon (UK mpg)](https://tttkmbb.com/conversion/mpg-to-mpg-uk.md)
- [Miles per imperial gallon (UK mpg) to Miles per US gallon (mpg)](https://tttkmbb.com/conversion/mpg-uk-to-mpg.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)