Annual Gas Cost Calculator — How Much Do You Spend on Gas?

Estimate your annual gas spending based on your daily commute. See daily, weekly, monthly, and yearly fuel costs plus gallons used and CO2 emissions per year.

L/100km km/L Cost per Mile Annual Gas Cost
Total miles driven per day (to work and back). Quick presets:
5 for Mon–Fri, 7 if you drive daily
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Annual Gas Cost
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Annual Gas Cost by Commute Distance & MPG

Daily Commute (mi) 20 MPG 25 MPG 30 MPG 35 MPG
10 mi (2,600 mi/yr) $455 $364 $303 $260
20 mi (5,200 mi/yr) $910 $728 $607 $520
30 mi (7,800 mi/yr) $1,365 $1,092 $910 $780
40 mi (10,400 mi/yr) $1,820 $1,456 $1,213 $1,040
50 mi (13,000 mi/yr) $2,275 $1,820 $1,517 $1,300
60 mi (15,600 mi/yr) $2,730 $2,184 $1,820 $1,560

Based on 5 days/week, 52 weeks/year, and $3.50/gallon (current US average gas price from EIA weekly data). Your actual cost depends on local gas prices and driving conditions.

How Annual Gas Cost Is Calculated

Annual Gas Cost = (Daily Commute × Days/Week × 52) ÷ MPG × Gas Price

Example: 30-mile daily commute, 5 days/week, 25 MPG, $3.50/gallon:

  1. Weekly miles: 30 × 5 = 150 miles
  2. Annual miles: 150 × 52 = 7,800 miles
  3. Annual gallons: 7,800 ÷ 25 = 312 gallons
  4. Annual gas cost: 312 × $3.50 = $1,092/year
  5. CO2 emissions: 312 × 8.887 kg = 2.77 metric tons/year

CO2 Emissions from Driving

Every US gallon of gasoline burned produces 8.887 kg of CO2 (EPA). This means:

  • A 25 MPG car driving 12,000 miles/year produces about 4.27 metric tons of CO2
  • A 35 MPG car driving the same distance produces about 3.05 metric tons of CO2
  • Improving from 20 to 30 MPG saves roughly 1.8 metric tons of CO2 per year

The average US passenger vehicle emits about 4.6 metric tons of CO2 per year (EPA).

Frequently Asked Questions

How much does the average American spend on gas per year?

The average American spends roughly $1,950 to $3,300 per year on gas, depending on vehicle type, commute distance, and gas prices (AAA Your Driving Costs 2025: fuel averages about 13¢/mile, or ~$1,950 at 15,000 mi/year for efficient cars; more for trucks and SUVs). Example: a 30-mile daily round-trip commute at 25 MPG and $3.50/gallon (example price) works out to 7,800 mi/yr, 312 gallons, and about $1,092/year.

How to reduce annual gas cost?

Top ways to save: (1) Carpool or combine errands to reduce miles, (2) Reduce highway speeds — the DOE estimates about 7% savings for each 5 mph you reduce above 50 mph, (3) Keep tires properly inflated, (4) Avoid aggressive acceleration, (5) Use cruise control on highways, (6) Remove roof racks when not in use, (7) Consider a more fuel-efficient vehicle — going from 20 to 30 MPG saves about $700/year at $3.50/gal and 12,000 miles.

Related Calculators

Calculations based on EIA (gas prices), EPA (CO₂: 8.887 kg/gal), IRS mileage rate, AAA Your Driving Costs Based on SI definitions (BIPM). Last reviewed: April 2026
Adilson Fernandes By Adilson Fernandes
Tiago Fernandes Reviewed by Tiago Fernandes

Monthly estimates use 4.33 weeks/month. Annual estimates use 52 weeks/year. CO2 emissions: 8.887 kg per US gallon of gasoline (EPA). Actual costs vary by driving conditions and gas prices.