Help with fuel conversion

Submitted: Sunday, Nov 10, 2013 at 18:48
ThreadID: 105073 Views:2368 Replies:8 FollowUps:15
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Hi all
I have to admit Iam dumb when it comes to this
To make it easier for the exercise
If I traveled 10 thousand km and was getting 15 lt per 100km how many Lt would I use in total and what is the best formula to use to calculate it
Many thanks
Greg
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Reply By: Jon W (Toow - Sunday, Nov 10, 2013 at 18:59

Sunday, Nov 10, 2013 at 18:59
10000 * 15 / 100 = 1500 L
AnswerID: 521224

Reply By: Ron N - Sunday, Nov 10, 2013 at 19:08

Sunday, Nov 10, 2013 at 19:08
Greg - You can either divide 100 into 10,000 to get a result of 100. Multiply this result by the litres per 100kms (15) and you get 1500 litres used - or you can multiply 10,000 by 15 to get 150,000 and then divide by 100 to get the correct result of 1500 litres.

As a formula -

10000 X 15
100


Cheers, Ron.
AnswerID: 521227

Follow Up By: Greg M15 - Sunday, Nov 10, 2013 at 19:26

Sunday, Nov 10, 2013 at 19:26
Hi Ron
Just to confirm is this correct
3000km x15 =45000 divided by 100 result being 450 litres
I hope
Thanks Greg
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Follow Up By: Herbal - Sunday, Nov 10, 2013 at 19:50

Sunday, Nov 10, 2013 at 19:50
Does this help?

15Lt per 100km = 6.6km per litre.

So no matter what distance you want to go, just divide it by 6.6 and that will give you your estimated fuel use.

Yes, your 3000km = 450lt is correct...

3000km divided by 6.6 = 454.5 Lt....Close enough!

We get 6.6 like this...100km divided by 15lt used = 6.666666km per litre.
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Follow Up By: garrycol - Sunday, Nov 10, 2013 at 21:28

Sunday, Nov 10, 2013 at 21:28
Herbal - don't confuse matters - the correct expression of fuel consumption in our metric system is litres/100km and Greg already has a grasp on this.

Miles per gallon may have been the correct expression in the imperial system but in the approved metric system it is not litres/km but litres/100km.

Logical or not that is the system.

Garry
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Follow Up By: Member - johnat - Sunday, Nov 10, 2013 at 21:46

Sunday, Nov 10, 2013 at 21:46
Garry,
But, for someone use to the older system of distance per unit of fuel (as in miles per gallon) it might be easier to use the equivalent measure of km per litre.

IF Greg "already has a handle on" litres per 100km, then so be it, but the alternative measure of km/litre might be useful to others.

Don't knock it - someone will be grateful for the information.
John
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Follow Up By: Bazooka - Sunday, Nov 10, 2013 at 21:58

Sunday, Nov 10, 2013 at 21:58
km/l is a far more useful thing to know, especially in vehicles which don't have the estimated kms left in your tank. Makes it a simple process to calculate your fuel requirements for any distance and of course how many kms you should get from a tank full (give or take).
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Follow Up By: Herbal - Monday, Nov 11, 2013 at 12:57

Monday, Nov 11, 2013 at 12:57
To make it less confusing for you Garry, I have made a quick reference list...

A = litres per 100km.
B = number to divide distance by to estimate fuel usage.

A - 10 then B - 10
A - 11 then B - 9.1
A - 12 then B - 8.3
A - 13 then B - 7.7
A - 14 then B - 7.1
A - 15 then B - 6.6
A - 16 then B - 6.2
A - 17 then B - 5.8
A - 18 then B - 5.5
A - 19 then B - 5.2
A - 20 then B - 5
A - 21 then B - 4.7
A - 22 then B - 4.5
A - 23 then B - 4.3
A - 24 then B - 4.15
A - 25 then B - 4

If you are getting better than 10lt per 100km then you probably don't care how much you use on a given trip.

If you are using more than 25lt per 100km...you probably gave up caring a long time ago, and just think of it as using the kids inheritance.
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Follow Up By: The Landy - Monday, Nov 11, 2013 at 14:01

Monday, Nov 11, 2013 at 14:01
The most useful measure is how many kilometres can I go for the amount of fuel I’m carrying.

The equation is straight forward and can be calculated at the time of refuelling.

Distance travelled / fuel used = kilometres per litre

If you know the litres / per 100 kilometres the equation to work out kilometres per litre:

100 / litres per 100 kilometres = kilometres per litre

/ = divide
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Follow Up By: garrycol - Monday, Nov 11, 2013 at 19:21

Monday, Nov 11, 2013 at 19:21
Hey people - mock and belittle as much as you like but just highlighting the Aussie standard is l/100km, the OP clearly understands this and his question had been answered and people come along using a system that is not basically used in most areas.

This system has been around for a long and is what most people use but maybe not people on here who maybe need to get with the program.

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Follow Up By: Bazooka - Monday, Nov 11, 2013 at 20:04

Monday, Nov 11, 2013 at 20:04
The only reason they went for litres/100km was to remove the decimal point eg 15l/100km = 6.7km/l .

Don't get me started on the klom-eh-ta V kill-o-metre argument.
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Follow Up By: The Landy - Tuesday, Nov 12, 2013 at 07:48

Tuesday, Nov 12, 2013 at 07:48
For my part Garry, no mocking and belittling offered or intended and I'm pressed to see any in this thread, some useful comments though.

Whether presented as Litres/100klm or klms/Litre the aim is to simply work out how far you can go with what you have in the tank, surely? Noting that a litres/100klm requires an additional calculation/conversion, but as you say, perhaps it is the standardised way of presenting it.

But, each to their own on this stuff and whatever works best, is simply - best for the individual.

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Reply By: Keith H7 - Sunday, Nov 10, 2013 at 19:52

Sunday, Nov 10, 2013 at 19:52
Try this link - http://motormouth.com.au/myvehicle/consumptioncalculator.aspx
AnswerID: 521229

Follow Up By: Member - Peter M (QLD) - Monday, Nov 11, 2013 at 08:16

Monday, Nov 11, 2013 at 08:16
Try the Go See Australia website they have a great fuel calculator that converts useage to both km to ltr an the old mpg
You have to start with a full tank and fill right up at each fill point.
I have been using it for years
PeterM Qld
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Reply By: Member - Boobook - Monday, Nov 11, 2013 at 08:25

Monday, Nov 11, 2013 at 08:25
Greg, it may help if you think of it this way.

For 15l/100km

You use 15 litres for every 100km of travel, so if you went 1000km that would be 150 litres or if you went 3000 km you would use 450 litres.

AnswerID: 521246

Reply By: The Landy - Monday, Nov 11, 2013 at 08:34

Monday, Nov 11, 2013 at 08:34
I use this as my trip planning tool which also includes a fuel calculator. The blog I wrote gives an explanation on it, but drop me a note if you would like any further clarification.

Trip and Fuel Planning Tool

Regards
Baz, The Landy
AnswerID: 521247

Reply By: Member -Dodger - Monday, Nov 11, 2013 at 15:01

Monday, Nov 11, 2013 at 15:01
Have a look at this file.
If you have exel on your Pooter then no probs just enter the required figures and it will give the answers automatically.





Hope it works.
I used to have a handle on life, but it broke.

Cheers Dodg.

Lifetime Member
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AnswerID: 521257

Follow Up By: Member -Dodger - Monday, Nov 11, 2013 at 15:03

Monday, Nov 11, 2013 at 15:03
Double click on xls.
I used to have a handle on life, but it broke.

Cheers Dodg.

Lifetime Member
My Profile  Send Message

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Reply By: Member - Scott M (NSW) - Monday, Nov 11, 2013 at 16:36

Monday, Nov 11, 2013 at 16:36
I tend to be old school on this one... learned MPG and I can get my head around K's per Liter, never been able to do quick calcs or get my head around on Ltrs per 100k ... just isn't natural or intuitive.

If I have x liters in my tank or x liters left in my tank, then multiplying that by KPL gives me a quick distance on the fuel capacity.

I suspect all the Lper100k advocates do the conversions back to KPL anyway which sort of negates the point of it.

Prepared to be bombed ....

AnswerID: 521261

Reply By: olcoolone - Monday, Nov 11, 2013 at 17:29

Monday, Nov 11, 2013 at 17:29
Didn't most learn this stuff in school...... I think primary!
AnswerID: 521266

Follow Up By: olcoolone - Monday, Nov 11, 2013 at 17:31

Monday, Nov 11, 2013 at 17:31
And 15 posts to explain and clarify it...... lucky it wasn't something technical.
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Follow Up By: Herbal - Monday, Nov 11, 2013 at 17:48

Monday, Nov 11, 2013 at 17:48
No mate !

I took elective auto mechanics in high school...But I ended up teaching the teacher...I remember his first lesson, when I had to explain that he was wrong and that one should wet the car first before washing it...Thinking about it, I also remember his second lesson, when I corrected him by advising that 1000 grit was not the finest W/D paper...Actually, thinking about it, I remember the day I took over the class to explain the difference between a 2 stroke and 4 stroke because the teacher could not explain how the fuel got into the chamber of a two stroke engine...

But then again...I also remember going to the Head Master and asking why Australian history was not a class...and his answer was "because you are expected to already know".
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Follow Up By: garrycol - Monday, Nov 11, 2013 at 19:23

Monday, Nov 11, 2013 at 19:23
Some are just a bit more resistant to change than others.
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