---
title: "Gas Cost Calculator — Road Trip Fuel Cost in MPG, L/100km"
description: "Calculate fuel cost for any road trip. Supports US MPG, UK imperial MPG, and L/100km. Split cost by number of passengers. See why US and UK MPG differ."
url: "https://worldcalculators.org/calculators/gas-cost/"
canonical: "https://worldcalculators.org/calculators/gas-cost/"
---

# Gas Cost Calculator

Calculate fuel cost for any road trip. Supports US MPG, UK imperial MPG, and L/100km. Split cost by number of passengers. See why US and UK MPG differ.

## Quick answer

A 300-mile trip in a 30 MPG (US) car at $3.50/gal costs $35 . The same trip in Europe: 483 km in a 7L/100km car at €1.70/L costs €57.50 .

## Frequently Asked Questions

A typical efficient petrol car achieves 5-7 L/100km. Hybrids can reach 3-4 L/100km. SUVs typically use 8-12 L/100km. Electric vehicles are measured in kWh/100km or miles per kWh instead.
The US federal gas tax is 18.4 cents/gallon, among the lowest in the developed world. Germany adds around 65 euro cents/litre in fuel tax. UK adds 52.95p/litre plus 20% VAT. Higher European fuel taxes are a major reason fuel prices are 2-3x higher than the US despite similar crude oil prices.

Source: https://worldcalculators.org/calculators/gas-cost/
Markdown mirror of the HTML page. Prefer this URL for RAG; the interactive calculator still lives on the HTML page.