# Fuel Cost Calculator

> Estimate fuel used and trip cost from distance, efficiency, and fuel price.

Page: https://askcalculators.com/calculator/fuel-cost-calculator/
Definition: https://askcalculators.com/calculator/fuel-cost-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/fuel-cost-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/fuel-cost-calculator/?efficiencyType=mpg&distance=300&efficiency=30&fuelPrice=3.5

## Inputs
- efficiencyType: Efficiency format; type=select; required; default=mpg; values=mpg|l100km
- distance: Trip distance; type=number; required; default=300; min=0
- efficiency: Fuel efficiency; type=number; required; default=30; min=0.000001
- fuelPrice: Fuel price per gallon or liter; type=money; required; default=3.5; min=0

## Outputs
- totalCost: Trip fuel cost; format=currency; primary
- fuelNeeded: Fuel needed; format=number
- fuelUnit: Fuel unit; format=text
- costPer100Distance: Cost per 100 distance units; format=currency

## Formula
MPG: fuel = distance ÷ MPG; metric: fuel = distance × L/100 km ÷ 100

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.