The Bengaluru to Chennai drive is about 347 km via NH44/NH48 (Krishnagiri-Vellore) and takes around 6.5 hours by car. In a petrol car doing 18 km/l, fuel for the one-way trip costs about Rs 2,138 at Bengaluru pump prices (Rs 110.93/litre, August 2026). Add roughly Rs 475 in tolls one-way, taking the road-trip budget to about Rs 2,613 each way.
Bengaluru to Chennai fuel cost by vehicle
| Vehicle | One-way fuel | Round-trip fuel |
|---|---|---|
| Petrol car (18 km/l) | Rs 2,138 | Rs 4,277 |
| Diesel car (22 km/l) | Rs 1,558 | Rs 3,117 |
| CNG car (28 km/kg) | Rs 1,202 | Rs 2,404 |
| Bike (45 km/l) | Rs 855 | Rs 1,711 |
Fuel prices used: Bengaluru petrol Rs 110.93/l, diesel Rs 98.80/l, CNG Rs 97.00/kg (as of August 2026). One-way car toll: about Rs 475 (FASTag; NHAI revises rates every April).
Calculate for your car
The trip calculator below is preloaded with the Bengaluru–Chennai distance, current petrol price and toll. Switch fuel type, tick round trip, or split the cost between passengers.
Prefilled for Bengaluru to Chennai (one-way distance and current petrol price). Adjust any value to match your vehicle.
Frequently Asked Questions
How much does petrol cost from Bengaluru to Chennai?
About Rs 2,138 one-way in a petrol car doing 18 km/l over the 347 km route, at Bengaluru prices of Rs 110.93 per litre.
What is the round-trip fuel cost for Bengaluru to Chennai?
Roughly Rs 4,277 in a petrol car, Rs 3,117 in a diesel car, or Rs 2,404 in a CNG car, plus about Rs 950 in tolls both ways.
How much is the toll from Bengaluru to Chennai?
About Rs 475 one-way for a car via NH44/NH48 (Krishnagiri-Vellore) (2025-26 FASTag rates; NHAI revises every April).
What is the cheapest way to drive from Bengaluru to Chennai?
Among cars, CNG works out cheapest at about Rs 1,202 one-way; a bike costs about Rs 855 in petrol.