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Converting 30 mpg to litres results in approximately 7.84 litres per 100 km.
This conversion takes the miles per gallon measurement and translates it into litres per 100 km, a more common metric. It helps compare fuel efficiency across different measurement systems. The calculation involves converting miles to kilometers and gallons to litres.
Conversion Result and Explanation
Using the conversion factor, 30 mpg equals about 7.84 litres per 100 km. This means that if a car runs at 30 miles per gallon, it consumes roughly 7.84 litres of fuel to travel 100 kilometers. This number helps understand fuel efficiency in metric units.
Conversion Tool
Result in litres:
Conversion Formula
To convert mpg to litres per 100 km, we use the formula: litres/100km = 235.21 / mpg. This works because 1 mile equals 1.60934 km, and 1 gallon equals 3.78541 litres. The number 235.21 arises from (100 km / 1.60934) / 3.78541, simplifying calculations.
For example, converting 30 mpg: 235.21 / 30 = 7.84 litres per 100 km. This step divides the constant by miles per gallon to get fuel consumption in metric units, providing comparable data across different vehicles and regions.
Conversion Example
- Convert 20 mpg:
- Apply the formula: 235.21 / 20
- Result: 11.76 litres per 100 km
- Convert 40 mpg:
- Apply the formula: 235.21 / 40
- Result: 5.88 litres per 100 km
- Convert 50 mpg:
- Apply the formula: 235.21 / 50
- Result: 4.70 litres per 100 km
- Convert 15 mpg:
- Apply the formula: 235.21 / 15
- Result: 15.68 litres per 100 km
Conversion Chart
| mpg | Litres per 100 km |
|---|---|
| 5.0 | 47.04 |
| 10.0 | 23.52 |
| 15.0 | 15.68 |
| 20.0 | 11.76 |
| 25.0 | 9.41 |
| 30.0 | 7.84 |
| 35.0 | 6.72 |
| 40.0 | 5.88 |
| 45.0 | 5.23 |
| 50.0 | 4.70 |
| 55.0 | 4.28 |
The chart helps to quickly find the litres per 100 km for different mpg values. To use, locate your mpg value in the first column and read the corresponding litres in the second column.
Related Conversion Questions
- How many litres are used per 30 mpg in city driving conditions?
- What is the fuel efficiency in litres per 100 km for 25 mpg?
- Can I convert 30 mpg to km per litre directly?
- What is the equivalent of 30 mpg in km/l in metric measurements?
- How does 30 mpg compare to 10 litres per 100 km?
- What is the fuel consumption in litres for a car that gets 40 mpg?
- Is 30 mpg considered good fuel efficiency in litres per km?
Conversion Definitions
mpg
mpg, or miles per gallon, measures how many miles a vehicle can travel on one gallon of fuel. It is used mostly in the US and UK to indicate fuel efficiency, with higher mpg meaning better fuel economy, and lower mpg indicating more fuel consumption.
litres
Litres is a metric unit of volume used to measure fuel quantity. It indicates how many litres of fuel are needed for a certain distance. In conversions, it helps compare fuel consumption between measurement systems, especially with km and miles.
Conversion FAQs
How accurate is the conversion from mpg to litres per 100 km?
The conversion relies on fixed constants for miles to km and gallons to litres, so it provides a reliable estimate. Variations in fuel types or measurement standards can slightly affect the exact number, but for most purposes, it’s sufficiently precise.
Why is the constant 235.21 used in this conversion?
The number 235.21 is derived from converting miles to km and gallons to litres, specifically: (100 km / 1.60934) / 3.78541. It simplifies calculations by directly relating mpg to litres per 100 km without complex steps.
Can I convert other units like km per litre to mpg using this formula?
Yes, but you’d need a different formula or conversion factor. The current formula is tailored for mpg to litres per 100 km. Converting km per litre to mpg requires reciprocals and additional constants, as the units measure different things.
What does a lower litres per 100 km number signify?
A lower number indicates better fuel efficiency, meaning the vehicle consumes less fuel to cover the same distance. For example, 5 litres per 100 km is more efficient than 10 litres per 100 km.
Is there a way to convert litres per 100 km back to mpg?
Yes, by reversing the formula: mpg = 235.21 / litres per 100 km. This allows you to estimate miles per gallon if you know fuel consumption in litres per 100 km.
