The Gas Mileage Equation computes the average gas mileage based on the starting odometer reading, the current odometer reading and the total gallons used between the two.
INSTRUCTIONS: Choose units and enter the following:
- (COR) Current Odometer Reading
- (POR) Previous Odometer Reading
- (G) Gasoline (petrol) used.
Gas Mileage (GM): The calculator returns the distance traveled in miles and the average gas mileage in miles per gallons. However these can be automatically converted to compatible units via the pull-down menu. The calculator also returns the mileage deduction or expense value for the year per the IRS.
The Math / Science
To calculate the gas mileage you have to first obtain odometer reading or reset the mileage counter when you fill up your gas tank. Then the next time, you fill up you gas tank again, obtain the mileage between the two gas fill up based on the odometer reading or the mileage counter. Then divided the difference between the mileage by the gas filled in the second time to obtain the Gas Mileage. The formula to compute gas mileage from two odometer readings and gallons of fuel is:
MPG = (COR - POR)/G
where:
- MPG = Average Miles per Gallon
- COR = Current Odometer Reading
- POR = Previous Odometer Reading
- G = Gallons at Fill-up
Road Travel Calculators:
- Cost to Drive: Fuel costs based on distance traveled, miles per gallon of vehicle, and dollars per gallon for fuel.
- Gas Mileage Equation: MPG based on two odometer readings and fuel consumed.
- Gas Mileage: MPG based on miles traveled and fuel consumed.
- Mileage Expense: Cost of travel based on mileage rate and distance traveled.
- Mileage Tax Deduction: Expense allocation based on miles traveled and category of travel (see below).
- Time to Travel: Time driving based on average speed and distance.
- Time to Overtake: Time to intercept based on distance between vehicles and average speed of both
- Compare US Dollars per Gallon vs Canadian Dollars per Liter prices
- Compute the Cost of a Road-Trip
- Euro Dollar Calculator combines unit conversions with currency conversions for the European Union and the United States.
- Fuel per Mile: This computes the fuel consumed per unit traveled (e.g. gallons per mile).
- Average Fuel Economy: This computes the miles per gallon or other fuel economy indicators (kilometers per liter)
- Energy in Diesel
- Energy in Gasoline
- CO2 from Burning an amount of Diesel Fuel
- Carbon Dioxide per Gallon Diesel
- Cost to Idle a Vehicle
- Carbon Tax
Money and Travel
The US Mileage Rate for Business Travel shows the dollars per mile deduction for business travel for the calendar year. The most recently queried information from the IRS website on mileage includes:
Mileage Calendar Year: 2022
- $62.5 USD/mi: Mileage Deduction for Business Travel
- $22.0 USD/mi: Mileage Deduction for Moving or Medical Travel
- $14.0 USD/mi: Mileage Deduction for Charitable Donation Travel
Use these deductions rates in the Mileage Tax Deduction Calculator. It computes tax deductions from miles travelled. Just enter the miles traveled and see the dollar amount associates for business, moving or medical, and charitable work.
Dollar per Gallon vs Other Currencies per Liter
International travel poses a several challenges, even if it's just over the boarder to Canada or Mexico. First, there is the conversion from liters to gallons, which is fixed, and then there's the conversion between the US dollar and other currency, which is constantly changing. vCalc is here to help. We know how to do the math and we keep track of currency fluctuations, and the result makes it easier on you.
Here are four examples, US dollar per gallon from
- Euros per Liter
- Canadian Dollars per Liter
- Great Britain Pounds per Liter
- Mexican Pesos per Liter
| Country | $1.00 Equivalent | |
| Canadian Dollar | 1.347 CAD | |
| Euro | 0.938 EUR | |
| Great Britain Pound | 0.814 GBP | |
| Mexican Peso | 17.198 MXN |
The formula to convert Euros per Liter to U.S. Dollars per Gallon is:
`DPG = € EPL * (3.7854 " Liters")/(1.0 " U.S. Gallons") * ($1.0 " USD")/( "€ 0.938 EUR")`
The formula to convert Canadian Dollars per Liter to U.S. Dollars per Gallon is:
`DPG = Can$ CPL * (3.7854 " Liters")/(1.0 " U.S. Gallons") * ($1.0 " USD")/( "$ 1.347 CAD")`
The formula to convert Great Britain Pounds (Sterling) per Liter to U.S. Dollars per Gallon is:
`DPG = £ PPL * (3.7854 " Liters")/(1.0 " U.S. Gallons") * ($1.0 " USD")/( "£ 0.814 GBP")`
The formula to convert Mexican Pesos per Liter to U.S. Dollars per Gallon is:
`DPG = ? PPL * (3.7854 " Liters")/(1.0 " U.S. Gallons") * ($1.0 " USD")/( "?17.198 MXN")`
where:
- DPG = US Dollars per Gallon
- € EPL = Euros per Liter
- Can$ CPL = Canadian Dollars per Liter
- £ PPL = Pounds per Liter
- ? PPL = Pesos per Liter
Note the currency exchange rates are updated every two minutes.
Additional Fuel Price Conversions:
- US Dollars per Gallon from India Rupees per Liter
- US Dollars per Gallon from Japanese Yen per Liter
- US Dollars per Gallon from Chinese Yuan per Liter
- Compare US Dollars per Gallon vs Canadian Dollars per Liter prices
- Fuel per Mile: This computes the fuel consumed per unit traveled (e.g. gallons per mile).