Gas Calculator — Trip Fuel Cost & CO₂ Emissions
Estimate how much you will spend on gas for any trip. Choose MPG (US) or L/100 km, enter the distance and fuel price, and get total cost, fuel volume needed, and CO₂ emissions in seconds.
Efficiency unit
miles
mpg
per gal
Cost of fuel for the trip based on distance, efficiency and price
- 1
Gallons needed
100 ÷ 30 = 3,333 - 2
CO₂ emitted (kg)
3,333 × 8,887 = 29,62 - 3
Total gas cost
3,333 × 3,5 = 11,67
¿Cómo funciona esta calculadora?
Gas cost = (Distance ÷ MPG) × Price per gallon for US vehicles, or (Distance × L/100 km ÷ 100) × Price per litre for metric. CO₂ emitted ≈ 8.89 kg per US gallon burned. The result is a trip planning estimate; actual consumption varies with speed, load and driving conditions.
Fórmula
How this is calculated
The calculator works in two common fuel-efficiency formats. In MPG mode, it divides the trip distance in miles by the vehicle's miles-per-gallon rating to find the gallons consumed, then multiplies by the price per US gallon. In L/100 km mode, it multiplies distance (in km) by the L/100 km figure and divides by 100 to get litres, then multiplies by the price per litre.
CO₂ emissions are estimated using the US EPA figure of 8.887 kg of CO₂ per US gallon of gasoline burned (2.347 kg/L), which covers tailpipe emissions only and assumes a typical gasoline blend. Diesel and alternative fuels have different emission factors.
The estimate assumes constant fuel consumption across the entire trip. Real-world consumption varies with driving speed, traffic, load, air conditioning, tyre pressure and terrain — treat the result as a reliable planning estimate rather than a guaranteed fuel bill.
Preguntas frecuentes
MPG (US) = 235.214 ÷ (L/100 km). For example, 7 L/100 km equals about 33.6 MPG.
It uses the EPA tailpipe figure of 8.887 kg CO₂ per US gallon of gasoline (2.347 kg/L). This covers combustion only — lifecycle emissions including fuel production are higher, typically 15–20 % more.
Convert km/L to L/100 km by dividing 100 by the km/L value. For example, 15 km/L = 100 ÷ 15 ≈ 6.67 L/100 km.
También conocido como
TG we-Calculate Editorial Team. (2026). Gas Calculator — Trip Fuel Cost & CO₂ Emissions [Online calculator]. TG we-Calculate. https://we-calculate.com/es/calculator/gas-calculator
TG we-Calculate Editorial Team. "Gas Calculator — Trip Fuel Cost & CO₂ Emissions." TG we-Calculate. 2026. https://we-calculate.com/es/calculator/gas-calculator.
TG we-Calculate Editorial Team, "Gas Calculator — Trip Fuel Cost & CO₂ Emissions," TG we-Calculate, 2026. [Online]. Available: https://we-calculate.com/es/calculator/gas-calculator
@misc{wecalculate_gas_calculator, title = {Gas Calculator — Trip Fuel Cost & CO₂ Emissions}, author = {{TG we-Calculate Editorial Team}}, howpublished = {\url{https://we-calculate.com/es/calculator/gas-calculator}}, year = {2026}, note = {TG we-Calculate} }
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