Skip to content
ENExplore Calculators

Parking Demand Estimate Calculator

Work out parking demand estimate instantly with clear inputs, formula shown and shareable results.

About Parking Demand Estimate Calculator

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.

Formulas

Demand

Space hours = trips per day x average duration

Supply

Spaces = ceil(space hours demanded / (operating hours x efficiency))

Worked example

With the default values below, Parking Demand Estimate Calculator returns Parking spaces required of 79. Change any input above and every figure here is recalculated in your browser.

Inputs used

Vehicle trips attracted per dayminimum 1
400
Average parking durationminimum 0.1 h
2 h
Operating hours per dayminimum 1 h
12 h
Practical occupancy efficiencyaccepts 30–100 %
85 %

Results

Parking spaces required
79
Total parking hours demanded
800.0 space·h
Turnover per space per day
5.06
Space hours available per space
10.2 h

Step by step

  1. 1Values used
  2. 2Demand
  3. 3Supply
  4. 4Parking spaces required= 79
  5. 5Total parking hours demanded= 800.0 space·h
  6. 6Turnover per space per day= 5.06
  7. 7Space hours available per space= 10.2 h

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Parking Demand Estimate figure worked out?

Space hours = trips per day x average duration. Parking demand is best expressed in space hours: trips multiplied by average duration.

Why not simply count peak accumulation?

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.

What values do I need to enter?

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.

Related Calculators

Parking Demand Estimate Calculator | Calcrivo