On average, you can expect to pay ₹ 85 per litre for petrol in United States. Keep in mind that this is last week’s national average price and petrol prices may vary across the country. In comparison, the country with the cheapest average petrol price is Algeria at ₹ 27 per litre, whereas the country with the most expensive average petrol price is Hong Kong at ₹ 241 per litre.