C-177 single pilot reported an uneventful off airport landing due to fuel starvation.

Attributes
ACN	1758381
Time
Date	202008
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Cardinal 177/177RG
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Route In Use	Visual Approach
Flight Plan	None
Component
Aircraft Component	Fuel System
Person 1
Function	Pilot Flying Single Pilot
Qualification	Flight Crew Instrument
Experience	Flight Crew Last 90 Days 10 Flight Crew Total 2300 Flight Crew Type 500
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Inflight Event / Encounter Fuel Issue

Narrative:

I had a off-airport landing because of engine failure. Presumably from fuel starvation. Fuel tanks for topped off 49 gallons total. Previous pilot flew less than 1/2 hour. My calculations for each leg from electronic flight planning software 17.5 gallons each leg. My calculations were than I would have 9 gallons left on landing. Or an hour reserve. Engine failed roughly two miles from the airport at roughly a 1;000 ft. AGL. I couldn't make the runway so I opted to land on a highway. No injuries and no damage to aircraft. There was an amount of fuel left in the right wing tank. Fuel selector was on both.

Original NASA ASRS Text

Title: C-177 Single Pilot reported an uneventful off airport landing due to fuel starvation.

Narrative: I had a off-airport landing because of engine failure. Presumably from fuel starvation. Fuel tanks for topped off 49 gallons total. Previous pilot flew less than 1/2 hour. My calculations for each leg from electronic flight planning software 17.5 gallons each leg. My calculations were than I would have 9 gallons left on landing. Or an hour reserve. Engine failed roughly two miles from the airport at roughly a 1;000 ft. AGL. I couldn't make the runway so I opted to land on a highway. No injuries and no damage to aircraft. There was an amount of fuel left in the right wing tank. Fuel selector was on both.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.