Multiply distance (km) by consumption (l/100 km) and divide by 100 to get liters. Then multiply by price per liter. Example: 500 km × 7 l/100 km / 100 = 35 liters.

A normal car consumes about 6–8 liters per 100 km. Hybrids can achieve 4–5 l/100 km. SUVs may consume 8–12 l/100 km.

With 7 l/100 km consumption and a price of $1.80/liter, driving 10 km costs approximately 7 × 1.80 / 10 = $1.26.