Petrol in Mumbai costs Rs 111.21 per litre and CNG on the MGL network costs Rs 86.00 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 6.18 per km on petrol versus Rs 3.07 per km on CNG — a saving of Rs 3.11 every kilometre.
Here is what that difference adds up to every month in Mumbai:
Monthly cost: CNG vs petrol in Mumbai
| Monthly driving | Petrol cost | CNG cost | You save |
|---|---|---|---|
| 1,000 km | Rs 6,178 | Rs 3,071 | Rs 3,107 |
| 1,500 km | Rs 9,268 | Rs 4,607 | Rs 4,660 |
| 2,000 km | Rs 12,357 | Rs 6,143 | Rs 6,214 |
CNG kit payback period in Mumbai
A sequential CNG kit installed in Mumbai typically costs around Rs 65,000. At current Mumbai prices a CNG conversion pays for itself in about 13.9 months if you drive around 1,500 km a month — a strong case for switching. After that, the roughly Rs 4,660 you save every month is pure gain.
Check your own numbers
The calculator below is already loaded with today’s Mumbai prices. Change the driving distance, mileage or kit cost to match your car and see your own payback period.
Prefilled with current Mumbai fuel prices. Adjust any value to match your car.
Frequently Asked Questions
What is the CNG price in Mumbai today?
CNG in Mumbai costs about Rs 86.00 per kg on the MGL network (as of August 2026). Petrol is about Rs 111.21 per litre.
How much money does CNG save per month in Mumbai?
Driving 1,500 km a month, a CNG hatchback in Mumbai costs about Rs 4,607 in fuel versus Rs 9,268 on petrol — a saving of roughly Rs 4,660 every month.
What is the CNG kit payback period in Mumbai?
With a Rs 65,000 kit and 1,500 km of monthly driving, the payback period in Mumbai is about 13.9 months at current prices.
Is converting to CNG worth it in Mumbai?
Yes — at current prices the kit pays back in about 13.9 months at 1,500 km/month, which is quick.
What is the per-km cost of CNG vs petrol in Mumbai?
About Rs 3.07 per km on CNG versus Rs 6.18 per km on petrol, assuming 28 km/kg and 18 km/l respectively.