🚗 How to Calculate CNG Mileage in Car – Step-by-Step Guide

Here’s an easy, step-by-step guide to calculate CNG mileage like a pro.
No maths headache, just simple steps, real examples, and quick results 🚀

🔎 What is CNG Mileage?

🛣️ CNG mileage means how many kilometers your car runs using 1 kg of CNG (Compressed Natural Gas).
Think of it as:
👉 “Kitna deti hai bhai?” but specifically for CNG cars 😄

⚖️ Unit of Measurement:

• CNG mileage is measured in km/kg
• That means:If your car runs 20 km using 1 kg of CNG → Your mileage is 20 km/kg

🔋 Why it matters?

✔️ Helps you track fuel efficiency
✔️ Saves 💸 on running costs
✔️ Helps compare between different CNG cars
✔️ Shows you if your car is doing good or needs a checkup 🔧

🔥 Real-Life Example:

Let’s say:

• You drive 180 km
• You refill 8 kg of CNG

Then your mileage is:
👉 180 ÷ 8 = 22.5 km/kg

🎯 That means your car is giving 22.5 km for every kg of gas. Not bad, right?

🛠️ Method 1: Full-Tank to Full-Tank Method – calculate CNG mileage

Step 1: Fill Your CNG Tank Full

Go to your nearest CNG pump and fill your tank completely ⛽
Right after that, reset your trip meter to 0 📟

Step 2: Drive Like You Normally Do

Now just drive your car as usual — office, market, long drive, whatever 🚗💨
Keep using your car until the CNG is almost finished (but don’t run it empty!)

Step 3: Refill Your Tank Again

Once the tank is low, go back to a pump and fill it to full again
Note how many kg of CNG you filled this time (they show it on the bill or meter) 🧾

Step 4: Note the Trip Meter Reading

Check how many kilometers you drove on that full tank (Trip meter will show it)
Example: 180 km

Now Let’s Do the Math:

Here’s the formula:

CNG Mileage = Distance Driven (km) ÷ CNG Filled (kg)

Let’s say:

• Trip Meter = 180 km
• CNG Refilled = 8 kg

👉 Mileage = 180 ÷ 8 = 22.5 km/kg 🎉

🛠️ Method 2: Odometer-Based Calculation – calculate CNG mileage

Sometimes you forget to reset the trip meter after a refill — no worries!
This method helps you calculate CNG mileage using the odometer reading (the total km reading on your dashboard)

What Affects CNG Mileage?

🛑 Step 1: Fill Your CNG Tank Full

Head to a CNG pump and fill up the tank completely
Now, note down your odometer reading (example: 25,300 km) ✍️

🚗 Step 2: Drive Normally

Use your car as you normally do — no special driving needed
Wait until your CNG gets low (don’t let it go fully empty)

🛑 Step 3: Refill Your Tank Again

Go to the pump again and refill it full.
Now, note the new odometer reading (example: 25,480 km)

🔢 Step 4: Do the Math

1. Subtract the old reading from the new reading:
   25,480 – 25,300 = 180 km
2. Check how many kg of CNG you just filled (example: 8 kg)

📐 Mileage Formula:

Mileage = Distance Driven (km) ÷ CNG Filled (kg)

So:

Mileage = 180 ÷ 8 = 22.5 km/kg

🎉 Boom! Your CNG mileage is 22.5 km/kg ✅

Use Our Free CNG Mileage Calculator Tool

1. CNG Mileage Per KG Calculator
   A simple tool to calculate how many kilometers you get per kg of CNG.
   🔗 https://gasmileageguide.com/tool/cng_mileage_per_kg_calculator
2. Fuel Consumption Calculator by Car Model
   Supports Petrol, Diesel, and CNG — provides estimates based on your specific car.
   🔗 https://gasmileageguide.com/tool/fuel_consumption_calculator_by_car_model 

🌐 Other Helpful Tools (Non-CNG but relevant)

3. **Car Mileage Calculator (Homepage)**
   The main portal with links to all mileage tools including CNG.
   🔗 https://gasmileageguide.com
4. **Bike Mileage Calculator**
   For two-wheelers — petrol-based but great for comparative insights.
   🔗 https://gasmileageguide.com/tool/bike-mileage-calculator 

📚 Blog & Info Pages (CNG Mentions) – calculate CNG mileage

• Tata Tiago Mileage (Petrol & CNG)
  https://blogs.gasmileageguide.com/tata-tiago-mileage/ 
• **Car with Maximum Mileage in India 2025**
  Highlights top CNG models (e.g., Tata Tiago CNG).
  https://blogs.gasmileageguide.com/car-with-maximum-mileage-in-india/ 
• **Real Mileage of Tata Altroz 2025**
  Includes ARAI-claimed CNG mileage for Altroz.
  https://blogs.gasmileageguide.com/real-mileage-of-tata-altroz-2025/

❓ Frequently Asked Questions (FAQ)