18 MPG to km/L
| 18 MPG (US) | = | 7.65 km/L |
| 18 MPG (US) | = | 21.6 MPG (UK / Imperial) |
| 18 MPG (US) | = | 13.1 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 18 MPG (US): 18 × 0.4251 = 7.65 km/L.
Is 18 MPG good?
18 MPG (US) is considered Below average — typical of full-size SUVs and pickup trucks. In km/L terms, that equals 7.65 km/L. In other units: 18 MPG (US) = 21.6 MPG (UK) = 13.1 L/100km.
Need a different value? Use our MPG to km/L Converter.
Similar Conversions
| MPG (US) | km/L | L/100km |
|---|---|---|
| 15 MPG | 6.38 | 15.7 |
| 16 MPG | 6.80 | 14.7 |
| 17 MPG | 7.23 | 13.8 |
| 19 MPG | 8.08 | 12.4 |
| 20 MPG | 8.50 | 11.8 |
| 21 MPG | 8.93 | 11.2 |
| 22 MPG | 9.35 | 10.7 |
| 23 MPG | 9.78 | 10.2 |
Related Fuel Economy Converters
Conversion factors verified against NIST, BIPM
Based on SI definitions (BIPM).
Last reviewed: March 2026
