How is L/100km converted to MPG?

Divide 235.215 by the L/100km value to obtain US MPG (or divide 235.215 by MPG to obtain L/100km).

What does a lower L/100km figure mean?

Unlike MPG where higher is better, in L/100km a lower number indicates higher fuel efficiency (fewer liters needed per 100km).

What causes real-world MPG to drop?

Aggressive acceleration, under-inflated tires, roof racks, cold weather, and prolonged engine idling.

Back to Calculators

General & Scientific Calculators● INSTANT WASM ENGINE

Automotive Fuel Economy & Trip Cost Calculator

Compute exact vehicle fuel efficiency metrics, bidirectional US MPG to Metric L/100km conversions, and total road trip travel expenditures.

Input Parameters

Trip Distance (Miles)

Miles

Fuel Consumed (Gallons)

Gallons

Fuel Price Per Gallon ($)

Vehicle Fuel Economy Instant

28.0 MPG

Metric: 8.40 L/100km | Cost: $0.13/mile

Proportional Breakdown100% Total

Fuel Expense:$45.63

Analytical Summary

Total Trip Fuel Cost$45.63

Cost Per Mile Driven$0.130/mi

Metric Fuel Efficiency8.40 L/100km

Fuel Consumed12.5 Gallons (47.3 Liters)

Mathematical Formula & Methodology

Underlying equations and mathematical logic governing this engine

Step 01

Miles Per Gallon (MPG)

MPG = DistanceMiles / FuelGallons

Average miles traveled per gallon of fuel consumed.

Step 02

Metric Conversion (L/100km)

L/100km = 235.215 / MPG

International standard for automotive fuel consumption.

Step 03

Trip Fuel Expenditure

Cost = FuelGallons * PricePerGallon

Direct financial fuel cost for the specified journey.

How to Use This Calculator

Record Odometer Distance

Enter miles driven between full tank fill-ups.

Enter Pump Gallons

Input exact volume pumped at the gas station.

Examine Cost Per Mile

Determine true operating expense for personal budgeting or business reimbursement.