Petrol in Delhi costs Rs 102.12 per litre and CNG on the IGL network costs Rs 83.09 per kg (prices as of August 2026). For a typical hatchback that does 18 km/l on petrol and 28 km/kg on CNG, that works out to Rs 5.67 per km on petrol versus Rs 2.97 per km on CNG — a saving of Rs 2.71 every kilometre.
Here is what that difference adds up to every month in Delhi:
Monthly cost: CNG vs petrol in Delhi
| Monthly driving | Petrol cost | CNG cost | You save |
|---|---|---|---|
| 1,000 km | Rs 5,673 | Rs 2,968 | Rs 2,706 |
| 1,500 km | Rs 8,510 | Rs 4,451 | Rs 4,059 |
| 2,000 km | Rs 11,347 | Rs 5,935 | Rs 5,412 |
CNG kit payback period in Delhi
A sequential CNG kit installed in Delhi typically costs around Rs 65,000. At current Delhi prices a CNG conversion pays for itself in about 16.0 months if you drive around 1,500 km a month — a strong case for switching. After that, the roughly Rs 4,059 you save every month is pure gain.
Check your own numbers
The calculator below is already loaded with today’s Delhi prices. Change the driving distance, mileage or kit cost to match your car and see your own payback period.
Prefilled with current Delhi fuel prices. Adjust any value to match your car.
Frequently Asked Questions
What is the CNG price in Delhi today?
CNG in Delhi costs about Rs 83.09 per kg on the IGL network (as of August 2026). Petrol is about Rs 102.12 per litre.
How much money does CNG save per month in Delhi?
Driving 1,500 km a month, a CNG hatchback in Delhi costs about Rs 4,451 in fuel versus Rs 8,510 on petrol — a saving of roughly Rs 4,059 every month.
What is the CNG kit payback period in Delhi?
With a Rs 65,000 kit and 1,500 km of monthly driving, the payback period in Delhi is about 16.0 months at current prices.
Is converting to CNG worth it in Delhi?
Yes — at current prices the kit pays back in about 16.0 months at 1,500 km/month, which is quick.
What is the per-km cost of CNG vs petrol in Delhi?
About Rs 2.97 per km on CNG versus Rs 5.67 per km on petrol, assuming 28 km/kg and 18 km/l respectively.