Fuel Economy Calculator - Calculate MPG, L/100km & Trip Cost

Calculate your vehicle's fuel economy (MPG, L/100km), trip fuel cost, and cost per mile/km. An accurate tool for drivers to track and budget fuel expenses.

Full original guide (expanded)

Audit: Complete

Formula (LaTeX) + variables + units

This section shows the formulas used by the calculator engine, plus variable definitions and units.

Formula (extracted text)

$ \text{Fuel Economy (MPG)} = \frac{\text{Distance (miles)}}{\text{Fuel Used (gallons)}} $

Formula (extracted text)

$ \text{Total Cost} = \text{Fuel Used (gallons)} \times \text{Price per Gallon} $

Formula (extracted text)

$ \text{Cost per Mile} = \frac{\text{Total Cost}}{\text{Distance (miles)}} \quad \text{or} \quad \frac{\text{Price per Gallon}}{\text{MPG}} $

Formula (extracted text)

$ \text{Fuel Economy (L/100km)} = \frac{\text{Fuel Used (litres)} \times 100}{\text{Distance (km)}} $

Formula (extracted text)

$ \text{Total Cost} = \text{Fuel Used (litres)} \times \text{Price per Litre} $

Formula (extracted text)

$ \text{Cost per km} = \frac{\text{Total Cost}}{\text{Distance (km)}} \quad \text{or} \quad \frac{\text{Fuel Economy (L/100km)}}{100} \times \text{Price per Litre} $

Variables and units

No variables provided in audit spec.

Sources (authoritative):

Home — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/
Lifestyle Everyday — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/lifestyle-everyday
Automotive — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/subcategories/automotive
Trip Cost Calculator (multi-leg) — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/trip-cost-calculator
Vehicle Depreciation Calculator — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/depreciation

Changelog

Version: 0.1.0-draft
Last code update: 2026-01-19

0.1.0-draft · 2026-01-19

Initial audit spec draft generated from HTML extraction (review required).
Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
Confirm sources are authoritative and relevant to the calculator methodology.

Verified by Ugo Candido on 2026-01-19
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Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft

Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog

0.1.0-draft — 2026-01-19: Initial draft (review required).