Work out parking demand estimate instantly with clear inputs, formula shown and shareable results.
Parking demand is best expressed in space hours: trips multiplied by average duration. Dividing by the hours each space can realistically be occupied gives the number of spaces needed. The efficiency factor below one hundred percent accounts for the time a space stands empty between users and for spaces that are hard to find.
Demand
Space hours = trips per day x average duration
Supply
Spaces = ceil(space hours demanded / (operating hours x efficiency))
Space hours = trips per day x average duration. Parking demand is best expressed in space hours: trips multiplied by average duration.
Peak accumulation is the better measure where data exists. The space hours method is used when only trip generation rates and typical durations are available.
This calculator takes 4 inputs: Vehicle trips attracted per day, Average parking duration, Operating hours per day, Practical occupancy efficiency. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.