Description:
The Fuel Cost Calculator is a web-based application that helps users estimate the total fuel expenses for a journey based on factors like distance, fuel efficiency, and fuel price. It’s designed for drivers, travelers, and logistics companies to plan trips more cost-effectively and compare vehicle options before traveling.

The backend (PHP, Java, or Node.js) handles user inputs, calculations, and optional fuel price API integration, while the frontend (HTML, CSS, Bootstrap, JavaScript) provides a clean, responsive interface for quick and easy usage.

Key Features:

• Input fields for trip distance, fuel efficiency (km/l or mpg), and fuel price per liter/gallon.

• Instant calculation of total fuel cost.

• Option to select from predefined vehicle profiles (car, bike, truck, etc.).

• Integration with real-time fuel price APIs for auto-filled price data.

• Multiple trip comparison feature for cost planning.

• Unit converter for km ↔ miles and liters ↔ gallons.

• Mobile-friendly interface for on-the-go use.

Example Use Case:
A delivery company wants to send a truck 450 km. The driver enters:

• Distance: 450 km

• Fuel efficiency: 8 km/l

• Fuel price: ₹110 per liter
  The calculator instantly shows that 56.25 liters of fuel will be required, costing approximately ₹6,187.5.