15 mpg is approximately 6.3776 kmpl.
The conversion from miles per gallon (mpg) to kilometers per liter (kmpl) involves changing miles to kilometers and gallons to liters. Since 1 mile equals about 1.60934 kilometers and 1 gallon equals about 3.78541 liters, you multiply the mpg value by the ratio of these units to get kmpl.
Conversion Tool
Result in kmpl:
Conversion Formula
The formula to convert miles per gallon (mpg) to kilometers per liter (kmpl) is:
kmpl = mpg × (1.60934 km / 1 mile) ÷ (3.78541 liters / 1 gallon)
This means you multiply the mpg value by the number of kilometers in a mile, then divide by the number of liters in a gallon. Because mpg measures miles per gallon and kmpl measures kilometers per liter, the units must be converted accordingly.
Example calculation for 15 mpg:
- Multiply 15 mpg by 1.60934 km/mile: 15 × 1.60934 = 24.1401 km/gallon
- Divide by 3.78541 liters/gallon: 24.1401 ÷ 3.78541 = 6.3776 kmpl
Conversion Example
Convert 25 mpg to kmpl:
- Multiply 25 × 1.60934 = 40.2335 km/gallon
- Divide 40.2335 ÷ 3.78541 = 10.6267 kmpl
- So, 25 mpg equals about 10.6267 kmpl.
Convert 8 mpg to kmpl:
- 8 × 1.60934 = 12.8747 km/gallon
- 12.8747 ÷ 3.78541 = 3.402 kmpl
- Therefore, 8 mpg is roughly 3.402 kmpl.
Convert 32 mpg to kmpl:
- 32 × 1.60934 = 51.4989 km/gallon
- 51.4989 ÷ 3.78541 = 13.609 kmpl
- Hence, 32 mpg equals about 13.609 kmpl.
Conversion Chart
| mpg | kmpl | mpg | kmpl | mpg | kmpl |
|---|---|---|---|---|---|
| -10.0 | -4.2517 | 5.0 | 2.1179 | 20.0 | 8.4715 |
| -5.0 | -2.1259 | 10.0 | 4.2357 | 25.0 | 10.5943 |
| 0.0 | 0.0000 | 15.0 | 6.3536 | 30.0 | 12.7072 |
| 1.0 | 0.4236 | 20.0 | 8.4715 | 35.0 | 14.8200 |
| 2.0 | 0.8472 | 25.0 | 10.5943 | 40.0 | 16.9330 |
The chart shows mpg values in the left columns and their corresponding kmpl values in the right columns. You can look up a mpg value and find its equivalent kmpl directly, which helps quick conversions without calculation.
Related Conversion Questions
- How many kilometers per liter is 15 miles per gallon?
- What is the fuel efficiency of 15 mpg in kmpl?
- Convert 15 mpg to kmpl for a car’s mileage.
- Is 15 mpg equivalent to more or less than 6 kmpl?
- What formula converts 15 miles per gallon to kilometers per liter?
- How does 15 mpg compare to kmpl in fuel consumption?
- What is the kmpl value if a vehicle runs 15 mpg?
Conversion Definitions
mpg: Miles per gallon (mpg) measures how many miles a vehicle can travel using one US gallon of fuel. It’s a commonly used unit in countries using imperial measurements, indicating fuel efficiency by distance per volume of gasoline consumed.
kmpl: Kilometers per liter (kmpl) represents how many kilometers a vehicle can move per liter of fuel. This metric unit is more common in countries using the metric system and helps to compare fuel efficiency based on distance per metric volume.
Conversion FAQs
Why is the conversion factor between mpg and kmpl not a whole number?
The conversion involves two unit changes: miles to kilometers and gallons to liters. Since 1 mile is approximately 1.60934 km and 1 gallon equals about 3.78541 liters, the ratio of these numbers results in a decimal factor. That’s why when converting, the factor isn’t a whole number.
Can mpg values be negative, and what does that mean in kmpl?
Negative mpg values are not physically meaningful in real-world driving, as they would imply negative fuel consumption or distance. However, mathematically, the formula will still convert negative mpg to negative kmpl, which should be interpreted cautiously, usually as an error or invalid input.
Is the conversion factor the same for US gallons and UK gallons?
No. The formula given uses US gallons, which are 3.78541 liters. UK gallons are larger at about 4.54609 liters, so converting mpg to kmpl using UK gallons requires a different factor. Using US gallon conversion for UK gallons will give incorrect results.
Does fuel type affect the mpg to kmpl conversion?
The conversion from mpg to kmpl only changes units and does not depend on fuel type. However, different fuels can affect actual fuel efficiency values, but the mathematical conversion remains constant regardless of fuel.
How precise is the conversion from mpg to kmpl?
Precision depends on how many decimals you keep in unit constants and calculations. The constants 1.60934 and 3.78541 are approximations, so very high precision requires more accurate constants. For everyday use, rounding to four decimals is sufficient.
Last Updated : 22 June, 2025
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Sandeep Bhandari holds a Bachelor of Engineering in Computers from Thapar University (2006). He has 20 years of experience in the technology field. He has a keen interest in various technical fields, including database systems, computer networks, and programming. You can read more about him on his bio page.