Which efficiency format should I use?

Use the one shown on your dashboard or spec sheet — L/100km and km/L are common in metric countries, MPG in the US/UK.

What's the difference between L/100km and km/L?

L/100km tells you how many liters are used per 100 kilometers (lower is better), while km/L tells you how many kilometers you get per liter (higher is better) — they're inverse ways of expressing the same efficiency.

Does this account for traffic, terrain, or driving style?

No — it uses the fuel efficiency figure you provide as a constant. Real-world fuel use varies with traffic, hills, and driving habits, so treat the result as a solid estimate rather than an exact figure.

Can I use this to compare an electric vehicle's running cost?

This calculator is built around fuel efficiency formats (L/100km, km/L, MPG) for combustion vehicles. An EV's cost-per-distance would need a separate calculation based on electricity price and efficiency in kWh per distance.

How accurate is the fuel price I should enter?

Use the current price at the pump you'll likely be using, since fuel prices can vary meaningfully by region and even by station along a route.

Date, Time & Everyday Utilities Cluster

Fuel Calculator

Estimate fuel cost & consumption for a trip.

TL;DR: Fuel Calculator is a free, browser-based tool that lets you estimate fuel cost & consumption for a trip.

Trip distance

Distance unit

Fuel efficiency

Efficiency unit

Fuel price (per L or gallon)

Understanding the Fuel Calculator

The Fuel Calculator calculates calendar intervals, time differences, working days, and chronological milestone countdowns with timezone and leap year awareness.

How It Works

Select your start date/time and end date/time using the interactive date pickers.
Configure options: include/exclude end dates, exclude weekends, and filter public holidays.
View the calculated duration in days, weeks, months, hours, and minutes.
Copy or share the calculated date interval.

Mathematical Formula & Methodology

Here is the standard mathematical equation used to calculate this result accurately:

\text{Trip Fuel Cost} = \frac{\text{Distance}}{\text{Fuel Economy (MPG)}} \times \text{Fuel Price per Gallon}

Formula Variables Explained:
Calculates total fuel volume and travel expenses for road trips across metric (L/100km) and imperial (MPG) units.

Step-by-Step Worked Example

Driving 600 miles in a car getting 30 MPG with fuel at $3.50/gallon: Fuel needed = 20 gallons; Total trip fuel cost = $70.00.

How to Get the Best Results

Leap Year & Month Lengths: Automatically accounts for 28, 29, 30, and 31-day month lengths and Gregorian leap years.
Business Day Calculations: Essential for project managers tracking working sprint durations and contract delivery deadlines.
Timezone Differences: Calculations are computed relative to your local browser timezone.

Related Guides & Tutorials

Freelance Hourly Rate Calculator — Learn in-depth concepts, best practices, and expert tips.
Percentage Calculator Guide — Learn in-depth concepts, best practices, and expert tips.

100% Client-Side Privacy Guarantee

All processing runs locally inside your browser using JavaScript and HTML5 APIs. Your data, files, and inputs are never uploaded to any remote server. Complete privacy by design.

Frequently Asked Questions

: Use the one shown on your dashboard or spec sheet — L/100km and km/L are common in metric countries, MPG in the US/UK.
: L/100km tells you how many liters are used per 100 kilometers (lower is better), while km/L tells you how many kilometers you get per liter (higher is better) — they're inverse ways of expressing the same efficiency.
: No — it uses the fuel efficiency figure you provide as a constant. Real-world fuel use varies with traffic, hills, and driving habits, so treat the result as a solid estimate rather than an exact figure.
: This calculator is built around fuel efficiency formats (L/100km, km/L, MPG) for combustion vehicles. An EV's cost-per-distance would need a separate calculation based on electricity price and efficiency in kWh per distance.
: Use the current price at the pump you'll likely be using, since fuel prices can vary meaningfully by region and even by station along a route.

Cite This Tool

Referencing this tool in a paper, article, or bibliography? Copy a ready-made citation below.

NexLove.org. (2026). Fuel Calculator [Software]. https://nexlove.org/tools/fuel-calculator.html

“Fuel Calculator.” NexLove.org, 2026, nexlove.org/tools/fuel-calculator.html.

NexLove.org (2026) Fuel Calculator. Available at: https://nexlove.org/tools/fuel-calculator.html (Accessed: 2026).

@misc{nexlove_fuel_calculator,
  title = {Fuel Calculator},
  author = {{NexLove.org}},
  year = {2026},
  url = {https://nexlove.org/tools/fuel-calculator.html}
}

Embed This Tool

Add the live Fuel Calculator tool to your own website with this snippet — it loads the real, working tool in an iframe, not a static screenshot.

<iframe src="https://nexlove.org/embed/fuel-calculator.html" width="100%" height="600" style="border:1px solid #e2e8f0;border-radius:12px" title="Fuel Calculator — NexLove.org" loading="lazy"></iframe>

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