Gas Annual Cost Calculator – Estimate Your Daily, Monthly, and Yearly Fuel Cost

Updated on 23-May-2025

Estimate your fuel costs based on your daily miles, vehicle MPG, and gas price. Get instant daily, monthly, and annual gas costs along with annual gallons used.


miles/day
miles/gallon
$/gallon
Annual Gas Cost
Daily Cost
$0.00
Monthly Cost
$0.00
Annual Cost
$0.00
Annual Gallons
0

Tracking your gas expenses is essential for managing your vehicle budget. Whether you're commuting daily or taking road trips, knowing your daily, monthly, and annual fuel cost helps in better financial planning. Our Gas Annual Cost Calculator simplifies this for you. Just enter how many miles you drive daily, your vehicle’s MPG (miles per gallon), and the current gas price to get a full cost breakdown.

Formulas Used

1. Daily Gallons Used

This is the amount of fuel your vehicle consumes each day based on how many miles you drive and your vehicle’s fuel efficiency (MPG).

Daily Gallons=Daily Miles DrivenVehicle MPG\text{Daily Gallons} = \frac{\text{Daily Miles Driven}}{\text{Vehicle MPG}}

2. Daily Gas Cost

This shows how much money you spend on gas each day, calculated by multiplying the daily gallons used by the current gas price.

Daily Cost=Daily Gallons×Gas Price\text{Daily Cost} = \text{Daily Gallons} \times \text{Gas Price}

3. Monthly Gas Cost

An estimate of your total gas expense in a month, based on your daily driving habits. It's calculated by multiplying the daily gas cost by 30.

Monthly Cost=Daily Cost×30

4. Annual Gas Cost

This is your total estimated gas expense for the whole year, assuming you drive the same distance daily. It multiplies the daily cost by 365.

Annual Cost=Daily Cost×365\text{Annual Cost} = \text{Daily Cost} \times 365

5. Annual Gallons Used

This is the total number of gallons your vehicle uses in a year, based on your daily driving and MPG.

Annual Gallons=Daily Gallons×365\text{Annual Gallons} = \text{Daily Gallons} \times 365

Example Calculation

Let’s calculate the fuel cost for the following:

  • Daily Miles Driven: 40 miles
  • Vehicle MPG: 20 miles per gallon
  • Gas Price: $3.50 per gallon

Step 1: Daily Gallons

Daily Gallons=4020=2\text{Daily Gallons} = \frac{40}{20} = 2

Step 2: Daily Cost

Daily Cost=2×3.5=7

Step 3: Monthly Cost

Monthly Cost=7×30=210\text{Monthly Cost} = 7 \times 30 = 210

Step 4: Annual Cost

Annual Cost=7×365=2555\text{Annual Cost} = 7 \times 365 = 2555

Step 5: Annual Gallons

Annual Gallons=2×365=730\text{Annual Gallons} = 2 \times 365 = 730

\text{Daily Cost} = 2 \times 3.5 = 7 \text{Monthly Cost} = \text{Daily Cost} \times 30

Gas Annual Cost Calculator – Estimate Your Daily, Monthly, and Yearly Fuel Cost