Speed Fuel Economy Calculator
Calculate how your driving speed affects fuel economy and costs. Understand the relationship between speed, fuel efficiency, and trip expenses.
Step 1: Vehicle & Speed Details
Speed vs Fuel Economy
Fuel economy typically decreases at higher speeds due to increased aerodynamic drag. Most vehicles achieve optimal fuel efficiency between 45-60 mph (70-100 km/h).
Step 2: Fuel & Cost Details
Fuel Efficiency at Different Speeds
Reducing your speed by just 5-10 mph can improve fuel economy by 7-14%. Driving at 65 mph instead of 75 mph can reduce fuel consumption by up to 15%.
Fuel Economy Results
Estimated Fuel Cost
Speed vs Fuel Economy Comparison
| Speed | Fuel Efficiency | Fuel Required | Total Cost |
|---|
Speed vs Fuel Economy Relationship
Fuel Economy Formula
Adjusted Efficiency = Base Efficiency × Speed Multiplier
Fuel economy decreases as speed increases due to aerodynamic drag. The relationship is not linear – fuel consumption increases exponentially at higher speeds. Most vehicles achieve optimal fuel economy between 45-60 mph.
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