15 MPG to km/L

15 MPG (US) = 6.38 km/L

15 MPG (US)=6.38 km/L
15 MPG (US)=18.0 MPG (UK / Imperial)
15 MPG (US)=15.7 L/100km

How to Convert MPG to km/L

This conversion is linear (a simple multiplication), unlike MPG ↔ L/100km. Both units measure distance per unit of fuel, so they scale proportionally.

  • km/L = MPG (US) × 0.42514371 (exact: 1.609344 km/mi ÷ 3.785411784 L/gal)
  • km/L = MPG (UK) × 0.35400622 (exact: 1.609344 km/mi ÷ 4.54609 L/gal)

Applying the formula to 15 MPG (US): 15 × 0.4251 = 6.38 km/L.

Is 15 MPG good?

15 MPG (US) is considered Poor — typical of large trucks, RVs, and heavy-duty vehicles. In km/L terms, that equals 6.38 km/L. In other units: 15 MPG (US) = 18.0 MPG (UK) = 15.7 L/100km.

Need a different value? Use our MPG to km/L Converter.

Similar Conversions

MPG (US)km/LL/100km
16 MPG 6.80 14.7
17 MPG 7.23 13.8
18 MPG 7.65 13.1
19 MPG 8.08 12.4
20 MPG 8.50 11.8

Related Fuel Economy Converters

km/L to MPG

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MPG to L/100km

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Conversion factors verified against NIST, BIPM Based on SI definitions (BIPM). Last reviewed: March 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes