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Miles per US gallon (mpg) to Kilometers per liter (mpg (US) to km/L)

Convert miles per US gallon (mpg) to kilometers per liter with the formula km/L = mpg (US) × 0.425144. Conversion table and worked examples, with JSON API and MCP access.

Formula

km/L = mpg (US) × 0.425144

km/L = mpg (US) × 0.425144 — reverse: mpg (US) = km/L × 2.352146

Non-linear conversion: the formula above is applied directly (no single multiplication factor).

Worked examples

7.5 mpg (US) = 3.18858 km/L
30 mpg (US) = 12.7543 km/L
45 mpg (US) = 19.1315 km/L

Miles per US gallon (mpg) to kilometers per liter conversion table

Miles per US gallon (mpg) (mpg (US))	Kilometers per liter (km/L)
3	1.27543
4	1.70057
5	2.12572
6	2.55086
7	2.97601
8	3.40115
9	3.82629
10	4.25144
12	5.10172
15	6.37716
20	8.50287
25	10.6286
30	12.7543
35	14.88
40	17.0057
45	19.1315
50	21.2572
60	25.5086
70	29.7601
80	34.0115
100	42.5144

FAQ

What is the formula to convert miles per US gallon (mpg) to kilometers per liter?

km/L = mpg (US) × 0.425144. For example, 7.5 mpg (US) = 3.18858 km/L.

How do I convert kilometers per liter back to miles per US gallon (mpg)?

mpg (US) = km/L × 2.352146; the kilometers per liter-to-miles per US gallon (mpg) 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

Machine access

API: GET https://tttkmbb.com/api/v1/convert?value=7.5&from_unit=mpg_us&to_unit=km%2FL
MCP: server https://tttkmbb.com/mcp, tool convert_units with {"value":7.5,"from_unit":"mpg_us","to_unit":"km/L"}
Markdown: https://tttkmbb.com/conversion/mpg-to-km-per-liter.md · JSON: https://tttkmbb.com/conversion/mpg-to-km-per-liter.json (add ?value= for a result) · Units: /api/v1/units?quantity=fuel-economy
OpenAPI operationId: convert_units. Freshness: static. Authentication: none.