Converting MPG into liters per 100 km

[ckbarnard]

Most PriusChatters are from the USA, but there are also a number from Canada, the UK, Europe, Australia, Japan, and other places, most or all of whom figure their mileage in metric terms. I'm from the USA and so understand MPG quite readily. However, I have a sister and her family who live in France. I'd love to be able to put my mileage into terms they live with.

Can anyone out there help me with a formula for converting MPG's to metric and vise versa?

[vtie]

<div class='quotetop'>QUOTE(ckbarnard @ May 2 2006, 09:31 AM) [snapback]248448[/snapback]</div>

Most PriusChatters are from the USA, but there are also a number from Canada, the UK, Europe, Australia, Japan, and other places, most or all of whom figure their mileage in metric terms. I'm from the USA and so understand MPG quite readily. However, I have a sister and her family who live in France. I'd love to be able to put my mileage into terms they live with.

Can anyone out there help me with a formula for converting MPG's to metric and vise versa?
[/b]

http://www.eforecourt.com/l_100km_mpg_convert.htm

http://www.pege.org/fuel/convert.htm

http://www.4wdworld.com.au/tipstricks/fuelconv.htm

...

[deh2k]

It appears that the formula to convert between miles per US gallon (MPG) and liters per 100 km (l/100km) is approximately 235.2 / x . The same formula converts in both directions. Beware that there is a difference between US and imperial gallons. Some tables, such as the Australian one above, use imperial gallons.

For whatever it's worth I believe that l/100km is a much better way to measure efficiency. Being the inverse of MPG, it makes the differences in inefficient cars more apparent.

[Tideland Prius]

www.onlineconversion.com

deh2k has for the conversion to US gallons right.

282/x for imperial

100/x for km/L

[aaf709]

My last car had a metric converter button that changed more than just the speedometer. It changed the odometer, temperature, average economy and instant economy. I didn't need that, but it was fun on occasion to use it.

[Sarge]

<div class='quotetop'>QUOTE(ckbarnard @ May 2 2006, 03:31 AM) [snapback]248448[/snapback]</div>

Most PriusChatters are from the USA, but there are also a number from Canada, the UK, Europe, Australia, Japan, and other places, most or all of whom figure their mileage in metric terms. I'm from the USA and so understand MPG quite readily. However, I have a sister and her family who live in France. I'd love to be able to put my mileage into terms they live with.

Can anyone out there help me with a formula for converting MPG's to metric and vise versa?
[/b]

Here's what I use (figures rounded);

1 mile = 1.6KM
1 US Gallon = 3.78L


The following Excel formula should convert from US MPG to L/100km


=(3.78/((MPG*1.6)/100))

Or to convert L/100KM to MPG US

=(62.5/(L100KM/3.78))


The bold of course being the number or cell reference you want convert. I think that math is right...

Of course, you can replace the mile/kilometer conversion and L/US Gallon conversion with the more scientifically precise numbers.

Kevin

[floydenheimer]

Google calculator can help you too, it does it all. I heart Google.

http://www.google.com/help/features.html#calculator

[ckbarnard]

Thank you, vtie from Belgium, Tideland Prius and Sarge from Canada, and deh2k and floydenheimer from I know not where. What an awesome website! You can get responses from all over the world! All the information I checked out, and it all was very interesting and useful. (Except Sarge, I couldn't figure out how to use your formula.) Particularly useful were the first two links to calculators provided by vtie and the formulas provided by deh2k and Tideland Prius. And thanks to floydenheimer for introducing me to Google's calculator! Very cool! Thanks to you guys, I now can tell my sister's family that I'm averaging between 4.8 and 5 liters per 100 km (47 to 49 MPG)! Thanks again!

[hdrygas]

<div class='quotetop'>QUOTE(Sarge @ May 2 2006, 09:44 AM) [snapback]248596[/snapback]</div>

Here's what I use (figures rounded);

1 mile = 1.6KM
1 US Gallon = 3.78L
The following Excel formula should convert from US MPG to L/100km
=(3.78/((MPG*1.6)/100))

Or to convert L/100KM to MPG US

=(62.5/(L100KM/3.78))
The bold of course being the number or cell reference you want convert. I think that math is right...

Of course, you can replace the mile/kilometer conversion and L/US Gallon conversion with the more scientifically precise numbers.

Kevin
[/b]

Thanks I am going to add L/100km and Gal/100 mi to my spread sheet. I should be interesting to follow!

[Orf]

Most contributors to this forum reside in the USA and use mile etc. When an author refers to figures I have to convert each to metric for the articles to make sense because I live in a country that uses metric. Either I need a good memory, a mathematical brain or use one of the conversion sites mentioned above to do the conversions.
The first two options are impossible and the last tiresome - too many conversions.
Has anyone designed a table that I can print out and refer to for conversions? To cover most occasions it would need to have miles per gallon to litres per 100 kilometres as well as MPH to Km/h.