Eleanor HayesDisclosure: This post contains affiliate links, which means we may earn a commission if you purchase through our links at no extra cost to you.
30 mpg equals approximately 11.76 litres per 100 km.
This conversion takes the miles per gallon measurement and translates it into litres per 100 km, which is a common metric used for fuel efficiency. The calculation involves converting miles to kilometers and gallons to litres, providing a standardized fuel consumption figure.
Understanding the Conversion from MPG to Litres
To convert miles per gallon (mpg) to litres per 100 km, you need to understand that 1 mile equals 1.60934 km and 1 gallon equals 3.78541 litres. The formula divides 100 km by the distance traveled in miles converted to km, then converts gallons to litres, resulting in a litres per 100 km value. For example, 30 mpg: 100 km divided by (30 miles times 1.60934 km/mile), then multiplied by 3.78541 litres per gallon for the final result.
Conversion Tool
Result in litres:
Conversion Formula
The formula to convert mpg to litres per 100 km is: litres per 100 km = 235.214583 / mpg, which works because it combines the conversion factors for miles to km and gallons to litres into a single constant. The constant 235.214583 is derived from (100 km / 1 mile in km) multiplied by (1 gallon in litres). For example, converting 30 mpg:
- Divide 235.214583 by 30 (the mpg value)
- Result: 7.84 litres per 100 km
- This means at 30 mpg, the vehicle consumes about 7.84 litres of fuel for every 100 km traveled
Conversion Example
- Convert 20 mpg to litres per 100 km:
- Divide 235.214583 by 20
- Result: 11.76 litres per 100 km
- So, a vehicle with 20 mpg uses about 11.76 litres for each 100 km
- Convert 40 mpg to litres per 100 km:
- Divide 235.214583 by 40
- Result: 5.88 litres per 100 km
- This indicates a more fuel-efficient vehicle consumes less fuel per 100 km
- Convert 15 mpg to litres per 100 km:
- Divide 235.214583 by 15
- Result: 15.68 litres per 100 km
- Lower mpg means higher litres per 100 km, indicating less efficiency
- Convert 55 mpg to litres per 100 km:
- Divide 235.214583 by 55
- Result: 4.28 litres per 100 km
- This shows very fuel-efficient vehicles have low litres per 100 km measurements
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 |
This chart helps you quickly see how different mpg values convert to litres per 100 km. To read it, find your mpg value in the left column and look across for the corresponding litres per 100 km in the right column.
Related Conversion Questions
- How many litres per 100 km is 30 mpg equivalent to?
- What is the fuel consumption in litres for 30 miles per gallon?
- Can I convert my vehicle’s mpg to litres per 100 km using this tool?
- How does changing mpg affect the litres per 100 km measurement?
- What is the difference between mpg and litres per 100 km?
- Is 30 mpg considered a fuel-efficient rate in litres per 100 km?
- How do I convert my car’s mpg reading to litres per 100 km manually?
Conversion Definitions
mpg
MPG, or miles per gallon, measures how many miles a vehicle can travel on one gallon of fuel, indicating fuel efficiency in imperial units. Higher mpg means less fuel used per mile, essential for estimating vehicle economy and comparing fuel consumption.
litres
Litres is a metric unit of volume used to measure fuel quantity, where one litre equals 1,000 cubic centimeters. When we convert mpg to litres, we’re translating fuel efficiency into a volume-based measure per distance, useful for international comparisons.
Conversion FAQs
How accurate is the formula for converting mpg to litres per 100 km?
The formula, litres per 100 km = 235.214583 / mpg, is precise because it combines the exact conversion factors for miles to km and gallons to litres. Small rounding differences may occur, but overall, it provides a reliable result for most calculations.
Can I use this conversion to estimate fuel costs?
While the conversion helps understand fuel efficiency, estimating costs requires knowing fuel prices. By knowing litres per 100 km, you can multiply the consumption by the cost per litre to estimate expenses for a trip or driving period.
Why does the litres per 100 km decrease as mpg increases?
Because higher mpg means fewer miles per gallon, which translates into less fuel used per distance. The inverse relationship means that as mpg rises, litres per 100 km drops, indicating more economical fuel consumption.
Is the conversion applicable for all vehicles?
The formula applies broadly for vehicles where mpg is measured in imperial gallons. For vehicles using US gallons, adjustments are needed. Always confirm the gallon type and units used for accurate conversions.
