Calculate Gas Cost for Any Trip

Built by Kevin Glover · @gloverbuilds · Verified formula

Enter your trip distance, vehicle MPG, and local gas price to see total fuel cost. Compare gas vs electric.

📅 Updated April 2026 ✅ Formula verified 📖 4 min read 🆓 Free · No sign-up

In this article

Calculating Fuel Cost
Gas vs Electric Cost Comparison

O Cálculo

Custo = distância ÷ (100/consumo km/L) × preço/litro. Viagem de 500 km com carro de 12 km/L e gasolina a R$5,80: 500÷12 × 5,80 = R$242. Para trajeto casa-trabalho de 30 km ida e volta: ~R$14,50/dia ou ~R$319/mês em 22 dias úteis.

Etanol vs Gasolina no Brasil

A regra dos 70%: se o etanol custa menos de 70% do preço da gasolina, compense usar etanol. Etanol a R$3,80, gasolina a R$5,80: 3,80÷5,80 = 65,5% — etanol é mais vantajoso. O app Preço da Hora mostra postos mais baratos na sua região.

⚡ CalcWolf Insight

Driving style affects fuel economy by 15-30%. Aggressive acceleration and high-speed highway driving (75+ mph) reduce MPG by 15-20% compared to smooth acceleration and 60-65 mph cruising. Using cruise control on highways improves fuel economy by 5-10%.

Frequently asked questions

Quanto para viagem de 500 km?▾

Carro 12 km/L, gasolina R$5,80: R$242. Com etanol a R$3,80 e 8 km/L: R$238. Quase igual nesse exemplo.

Etanol ou gasolina?▾

Regra dos 70%: preço etanol ÷ preço gasolina. Se < 70%: etanol. Se > 70%: gasolina.

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Kevin Glover · @gloverbuilds

Founder, CalcWolf · GLVTS · Blickr

All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →