CNG Vehicle Mileage & Tank Range Calculator
Select your vehicle to calculate actual usable CNG capacity in kilograms at pump dispenser pressure (160–220 BAR), real-world city and highway driving range, and running cost per kilometer.
⚙️ Configure Vehicle & Dispenser
Choose your car model and adjust dispenser filling pressure to calculate tank yield.
💡 Rule of thumb: Low dispenser pressure reduces usable gas by up to 20%, directly cutting your driving range.
Maruti Suzuki Ertiga CNG
Plan your highway refill by 195 km. Retain a 35 km buffer to avoid running on petrol during remote expressway stretches.
Explore 39 verified expressways and intercity routes with exact forecourt waypoints located every 25–45 km.
Browse 39 Highway Corridors →Gas Cylinder Rules require hydro-testing every 3 years. Bunks legally decline uncertified or expired plates.
Find Certified Testing Centers →India CNG Cars Mileage & Full Tank Range Comparison (2026)
Official ARAI certified mileage compared with real-world city and highway test figures at standard 200 BAR pressure.
| Vehicle Model | ARAI Mileage | Real Highway | Real City | Usable Gas (200 BAR) | Full Tank Highway Range | Quick Select |
|---|---|---|---|---|---|---|
| Maruti Suzuki Ertiga CNG Single 60L Forecourt Tank | 26.11 km/kg | 25.5 km/kg | 21 km/kg | ~9.2 kg (60L tank) | ~235 km | |
| Maruti Suzuki Wagon R CNG Single 60L Forecourt Tank | 34.05 km/kg | 31 km/kg | 26.5 km/kg | ~8.5 kg (60L tank) | ~264 km | |
| Tata Punch iCNG Dual Cylinder (30L + 30L Under Boot) | 26.99 km/kg | 24.5 km/kg | 20.5 km/kg | ~9 kg (60L tank) | ~221 km | |
| Maruti Suzuki Brezza CNG Single 55L Forecourt Tank | 25.51 km/kg | 23.5 km/kg | 19.5 km/kg | ~8.6 kg (55L tank) | ~202 km | |
| Maruti Suzuki Fronx CNG Single 55L Forecourt Tank | 28.51 km/kg | 26.5 km/kg | 22.5 km/kg | ~8.5 kg (55L tank) | ~225 km | |
| Tata Tiago iCNG Dual Cylinder (30L + 30L) | 26.49 km/kg | 24 km/kg | 20 km/kg | ~8.4 kg (60L tank) | ~202 km | |
| Maruti Suzuki Baleno CNG Single 55L Forecourt Tank | 30.61 km/kg | 28 km/kg | 24 km/kg | ~8.5 kg (55L tank) | ~238 km | |
| Maruti Suzuki Dzire CNG Single 55L Forecourt Tank | 31.12 km/kg | 29.5 km/kg | 25 km/kg | ~8.5 kg (55L tank) | ~251 km | |
| Tata Altroz iCNG Dual Cylinder (30L + 30L Under Boot) | 26.2 km/kg | 23.5 km/kg | 19.5 km/kg | ~9 kg (60L tank) | ~212 km | |
| Hyundai Grand i10 Nios CNG Single 60L Forecourt Tank | 27 km/kg | 24 km/kg | 20 km/kg | ~8.4 kg (60L tank) | ~202 km | |
| Hyundai Exter Hy-CNG Dual Cylinder Duo Tech | 27.1 km/kg | 24 km/kg | 20 km/kg | ~8.8 kg (60L tank) | ~211 km |
🔬 The Engineering: Why a 60 Litre Tank Holds Only ~9 kg of CNG
Automotive cylinders are stamped with Water Capacity in Litres (e.g. 60L). Because natural gas is compressible, the actual mass in kilograms depends strictly on pressure: at standard 200 BAR (2,900 PSI), 1 litre of cylinder volume accommodates approximately 0.145 to 0.160 kg of natural gas.
Gas expands with heat. In peak summer (42°C in Delhi, Ahmedabad, or Pune), dispenser pressure gauges may show 200 BAR, yet thermal expansion yields only ~8.0 kg. During crisp early mornings, the same cylinder accommodates up to 9.8 kg, yielding an extra 35–45 km of highway range.
During peak evening commute queues, retail forecourt booster compressors struggle to maintain 200 BAR continuously. Dispensers often trip at 160–175 BAR, leaving tanks 15% to 20% underfilled.
Frequently Asked Questions about CNG Car Mileage & Driving Range
How many kilograms of CNG can a 60 Litre cylinder actually hold?
A standard 60-litre water capacity automotive CNG cylinder holds approximately 8.5 kg to 9.5 kg of usable natural gas when filled at the standard PESO regulated pressure of 200 BAR. If pump dispenser pressure drops to 160–180 BAR during peak queue hours, usable gas drops to 7.2–8.0 kg.
What is the real-world highway driving range of Ertiga CNG on a full tank?
The Maruti Suzuki Ertiga CNG holds approximately 9.2 kg of usable natural gas at 200 BAR. With real-world highway cruising mileage of 25.0 to 26.0 km/kg, its realistic driving range on a single full tank is approximately 230 km to 245 km.
What is the real-world mileage of Tata Punch iCNG with dual cylinders?
The Tata Punch iCNG utilizes twin 30-litre cylinders (60 litres total water capacity) accommodating ~9.0 kg of usable gas. In actual city driving, it delivers 20.0–21.5 km/kg, while steady highway cruising yields 24.0–25.5 km/kg, providing a total tank range of ~220 km.
Why is actual CNG mileage lower than ARAI certified mileage?
ARAI mileage is tested under laboratory dyno conditions without continuous AC usage, passenger load, or wind resistance. Real-world city driving with AC and stop-and-go traffic reduces mileage by 15% to 20% compared to official ARAI figures.
