Spike's Calculators

Bargain Hunting

Spike VM

Is it worth your Time and Money?

You go grocery shopping at your favourite store, but then your husband points out that his favourite beer is 4 dollars cheaper if you buy it at another store. How much will it cost on fuel to buy cheaper-priced items at another location?

Purchasing at Different Locations

Average Miles per Gallon mi/gal US
Price per Gallon of Fuel $/gal US
Distance; Home to Store A mi
Distance; Store A to Store B mi
Distance; Store B to Home mi
Money Saved on Purchase(es) $


Driving Cost per Mile $
Trip Cost; Home to Location A $
Trip Cost; Home to Locations A + B $
Amount you Saved (Negative = Loss) $


  1. average miles per gallon of your vehicle
  2. price of one gallon of gas
  3. distance, home to store A
  4. distance from store A to B
  5. distance from store B to home
  6. a price difference of item(s) that makes you go to store B (money you save on the product(s))


  1. cost of fuel driving one mile
  2. fuel cost for a shopping trip at store A
  3. fuel cost including store B in your shopping trip
  4. savings (a negative amount = loss)
Your average miles per gallon is 24
The price of one gallon of fuel is $3.84
Distance from home to store A is 9.6 miles
Distance from store A to store B is 3.6 miles
The distance from store B to home is 11.4 miles
Going to a different store because the items are cheaper saves you $1.85

First, calculate fuel cost per mile;
3.84 ÷ 24 = 0.16
It cost 0.16 to drive one mile.

Calculate the cost of gas to drive to store A
9.6 * 0.16 = 1.536
The cost of fuel driving from home to location A is $1.54

If you purchase all your items at location A, the total cost in fuel will be 2 * 1.54 = $3.08.

Calculate the cost of driving from location A to B;
3.6 * 0.16 = 0.576
The fuel cost for driving from A to B is $0.58

Calculate the cost of driving from location B to home;
11.4 * 0.16 = 1.824
The cost of gas for returning home from location B is $1.83.

Including location B in your trip will cost a total of 1.54 + 0.58 + 1.83 = $3.95 in gas,
adding 3.95 - 3.08 = $0.87 to the gas cost.
The fuel cost will reduce the savings of $1.85 to $0.98 on the items you purchase there.

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