15 MPG to Liters – Answer with Formula

The conversion of 15 miles per gallon (mpg) to liters per 100 km is approximately 15.68 liters.

This means that a vehicle that gets 15 mpg consumes about 15.68 liters of fuel per 100 kilometers traveled. To convert mpg to liters, you need to consider the relationship between miles, gallons, liters, and kilometers, applying the conversion factors accordingly.

Conversion Result and Explanation

15 mpg is roughly equal to 15.68 liters per 100 km. This conversion helps compare fuel efficiency across different measurement systems by translating miles per gallon into liters per 100 kilometers, which is widely used in many countries outside the US.

Conversion Tool

Enter value in mpg:

Result in liters:

Conversion Formula

The formula to convert mpg to liters per 100 km is: liters/100 km = 100 / (mpg × (miles to km / gallons to liters)). This works because it calculates how many liters are needed to cover 100 km based on miles per gallon. For example, for 15 mpg: 100 / (15 × 1.609344 / 3.785411784) = approximately 15.68 liters.

Conversion Example

• Convert 20 mpg:
  • Step 1: Multiply 20 mpg by (1.609344 / 3.785411784) ≈ 0.8519
  • Step 2: Divide 100 by 0.8519 ≈ 117.38 liters per 100 km
• Convert 10 mpg:
  • Step 1: 10 × 0.8519 ≈ 8.519
  • Step 2: 100 / 8.519 ≈ 11.75 liters per 100 km
• Convert 25 mpg:
  • Step 1: 25 × 0.8519 ≈ 21.30
  • Step 2: 100 / 21.30 ≈ 4.69 liters per 100 km
• Convert 35 mpg:
  • Step 1: 35 × 0.8519 ≈ 29.82
  • Step 2: 100 / 29.82 ≈ 3.35 liters per 100 km
• Convert 50 mpg:
  • Step 1: 50 × 0.8519 ≈ 42.60
  • Step 2: 100 / 42.60 ≈ 2.35 liters per 100 km

Conversion Chart

The table below shows how mpg values convert to liters per 100 km. Use it to quickly estimate fuel consumption for different mileage figures:

mpg	Liters per 100 km
-10.0	Infinite (negative mpg)
0.0	Infinity
5.0	33.38
10.0	16.69
15.0	11.13
20.0	8.37
25.0	6.69
30.0	5.56
35.0	4.76
40.0	4.17
50.0	3.34
60.0	2.78
70.0	2.39
80.0	2.07
90.0	1.85
100.0	1.69
110.0	1.53
120.0	1.40
130.0	1.29
140.0	1.20
150.0	1.13
160.0	1.06
170.0	1.00
180.0	0.94
190.0	0.89
200.0	0.84

Note: Negative or zero mpg values are not practical and result in infinite or undefined liters per 100 km readings.

Related Conversion Questions

• How many liters are equivalent to 15 mpg in city driving?
• What is the fuel consumption in liters for a vehicle with 15 mpg efficiency?
• Can I convert 15 mpg to liters per 100 km using an online calculator?
• How does 15 mpg compare to 10 liters per 100 km?
• What is the liters per km equivalent of 15 mpg?
• Is 15 mpg considered fuel efficient in liters per 100 km?
• How do I convert my vehicle’s 15 mpg rating to liters per 100 km manually?

Conversion Definitions

mpg: Miles per gallon measures how many miles a vehicle can travel on one gallon of fuel, indicating fuel efficiency in the imperial system, used mainly in the United States and UK.

liters: Liters are metric units of volume used to quantify fuel capacity or consumption, where one liter equals 1,000 cubic centimeters, common in most countries outside the US.

Conversion FAQs

Why is converting mpg to liters important for drivers overseas?

Converting mpg to liters helps drivers understand fuel efficiency in metric terms, making it easier to compare vehicles and estimate fuel expenses when traveling or purchasing cars in countries that use the metric system.

How accurate is the conversion formula used in the tool?

The formula provides a close approximation based on standard conversion factors for miles to kilometers and gallons to liters. Slight variations may occur due to rounding, but it generally offers reliable results for practical purposes.

Can I use this conversion for electric vehicles?

No, electric vehicles don’t use fuel in gallons or liters, so this conversion is only applicable for internal combustion engine vehicles that consume gasoline or diesel.

What should I do if my mpg value is negative or zero?

Negative or zero mpg values are invalid for fuel efficiency calculations as they imply no fuel consumption or impossible travel distance. In such cases, the conversion does not produce meaningful results.

Is there a simple way to remember the conversion factor?

Remember that 1 mpg roughly equals 0.425 liters per 100 km, derived from the formula. Using this approximation makes quick mental calculations possible without complex formulas.