Plug-in Hybrid Economy Calculator

Your details

How far your PHEV travels on a full battery charge before the combustion engine starts. Check your car manual or the EPA label.
mi
Energy used per 100 miles (or 100 km) in electric mode. Typical PHEVs use 25-40 kWh/100 mi.
kWh/100
Miles per gallon (or km per litre) when running on gasoline only, after the battery is depleted.
MPG
Average one-way distance for trips shorter than your battery range.
mi
Round trips count as two trips.
trips
Average distance for trips that exceed your battery range.
mi
trips
Your local pump price per gallon (or per litre).
$/gal
Your home electricity rate. Check your utility bill for the exact figure.
$/kWh
The MPG (or km/L) of the conventional car you are comparing against.
MPG
Extra cost of the PHEV vs the conventional comparison car. Include any charging-equipment costs and subtract government incentives.
$
Real-world MPGeMixed usage
70.9MPGe

Miles per gallon of gasoline-equivalent, combining electric and gas miles

Monthly electric miles840mi
Monthly gas miles400mi
PHEV monthly fuel cost70.28$
Comparison car monthly cost144.67$
Monthly savings74.39$
Payback period5.6years
Electric share0.7%
Monthly electricity cost35.28$
Monthly gasoline cost35$
PHEV monthly costs70.28
Comparison car costs144.67

Monthly savings: 74.39

  • Electricity
  • Gasoline

Your PHEV achieves 70.9 MPGe with 68% electric driving.

  • 68% of your monthly miles are covered by battery power, reducing gasoline use proportionally.
  • You save about $74.39 per month on fuel compared to your comparison car.
  • The payback period is about 5.6 years. Charging more frequently or lower electricity rates would shorten it.
  • Real-world results vary with temperature, driving style, highway vs city split, and how reliably you charge between trips.

Next stepYou are already getting strong electric utilization. Consider a time-of-use electricity tariff to charge overnight at a lower rate.

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