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How to Calculate Fuel Cost: Complete Formula with Real Examples (India 2026)

Learn the exact formula to calculate fuel costs for any trip distance. Includes 5 worked examples with current Indian diesel prices.

RK

Written by Rajesh Kumar

Former Fleet Operations Manager | Managed 85-vehicle Mumbai fleet 2016-2019 | Now helping transport businesses optimize costs

The Basic Fuel Cost Formula

Fuel Cost = (Distance ÷ Mileage) × Fuel Price Per Liter

Where:

Example 1: Simple Trip Calculation

Delhi to Jaipur Delivery

Given:

  • Distance: 280 km
  • Truck mileage: 6 km/L
  • Diesel price in Delhi: ₹94.72/L (March 2026)

Calculation:

Fuel needed = 280 km ÷ 6 km/L = 46.67 liters
Fuel cost = 46.67 L × ₹94.72 = ₹4,419

Answer: Fuel cost for Delhi-Jaipur trip = ₹4,419

Example 2: Round Trip Calculation

Mumbai to Pune Round Trip

Given:

  • One-way distance: 148 km
  • Round trip distance: 148 × 2 = 296 km
  • Truck mileage: 5.5 km/L
  • Diesel price in Mumbai: ₹102.63/L

Calculation:

Fuel needed = 296 km ÷ 5.5 km/L = 53.82 liters
Fuel cost = 53.82 L × ₹102.63 = ₹5,524

Answer: Round trip fuel cost = ₹5,524

Example 3: Monthly Fuel Cost Calculation

Single Truck Monthly Expenses

Given:

  • Average daily distance: 220 km
  • Working days per month: 26 days
  • Monthly distance: 220 × 26 = 5,720 km
  • Truck mileage: 6.2 km/L
  • Average diesel price: ₹96.50/L

Calculation:

Monthly fuel needed = 5,720 km ÷ 6.2 km/L = 922.58 liters
Monthly fuel cost = 922.58 L × ₹96.50 = ₹89,029

Answer: Monthly fuel cost for one truck = ₹89,029

Annual fuel cost = ₹89,029 × 12 = ₹10,68,348

Example 4: Cost Per Kilometer Calculation

Finding Your Per-KM Fuel Cost

This is useful for pricing trips and comparing different vehicles.

Given:

  • Truck mileage: 5.8 km/L
  • Diesel price: ₹98.40/L

Formula:

Cost per km = Fuel Price ÷ Mileage
Cost per km = ₹98.40 ÷ 5.8 km/L = ₹16.97/km

Answer: Fuel cost is ₹16.97 for every kilometer driven

For a 500 km trip: 500 × ₹16.97 = ₹8,485

Example 5: Fleet Fuel Cost (Multiple Vehicles)

15-Vehicle Fleet Monthly Cost

Vehicle Type Count Avg km/day Mileage Monthly Fuel Cost
LCV (Chota Hathi) 5 180 km 8 km/L ₹2,76,975
MCV (Tata 1109) 7 240 km 6 km/L ₹5,36,928
HCV (Eicher 25T) 3 320 km 5 km/L ₹2,99,520
TOTAL MONTHLY FUEL COST ₹11,13,423

Calculation for LCV:

Monthly km per LCV = 180 km/day × 26 days = 4,680 km
Fuel per LCV = 4,680 ÷ 8 km/L = 585 liters
Cost per LCV = 585 L × ₹95/L = ₹55,575
Total for 5 LCVs = ₹55,575 × 5 = ₹2,77,875

Annual fleet fuel cost = ₹11,13,423 × 12 = ₹1.34 crore

Quick Reference: Fuel Cost by Distance

At average mileage of 6 km/L and diesel at ₹96/L:

Distance Fuel Needed Fuel Cost
100 km16.67 L₹1,600
200 km33.33 L₹3,200
500 km83.33 L₹8,000
1,000 km166.67 L₹16,000
2,000 km333.33 L₹32,000

Current Diesel Prices (March 2026)

City Price per Liter
Mumbai₹102.63
Delhi₹94.72
Bangalore₹95.23
Chennai₹100.75
Kolkata₹97.61
Hyderabad₹103.19
Ahmedabad₹97.24
Pune₹100.23

Note: Diesel prices change daily. Check current rates on Indian Oil website.

How to Improve Your Mileage

Better mileage = lower fuel costs. Here's how different mileages affect costs:

Mileage Fuel Cost (1000 km) Monthly Cost (5000 km) Annual Savings vs 5 km/L
5 km/L₹19,200₹96,000-
5.5 km/L₹17,455₹87,273₹1,04,724
6 km/L₹16,000₹80,000₹1,92,000
6.5 km/L₹14,769₹73,846₹2,65,848
7 km/L₹13,714₹68,571₹3,29,148

Improving from 5 to 6 km/L saves ₹1.92 lakhs per year per truck!

Tips to Reduce Fuel Costs

  1. Maintain optimal tire pressure - Can improve mileage by 3-5%
  2. Regular engine maintenance - Clean air filters, proper oil changes
  3. Driver training - Smooth acceleration, maintaining 50-60 km/h
  4. Route optimization - Avoid traffic, find shorter routes
  5. Reduce weight - Don't carry unnecessary load
  6. Use GPS tracking - Monitor fuel consumption, detect theft

Try Our Free Calculator

Calculate fuel costs instantly for any trip:

Use Fuel Cost Calculator →

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Summary

Basic formula: (Distance ÷ Mileage) × Fuel Price
Example: (500 km ÷ 6 km/L) × ₹96/L = ₹8,000
Tip: Track actual mileage monthly to get accurate costs
Action: Use our calculator to estimate your trip costs