Lift Traffic Analysis Calculator

Work out lift traffic analysis instantly with clear inputs, formula shown and shareable results.

About Lift Traffic Analysis Calculator

Lift group performance is judged on two numbers. Handling capacity is the share of building population moved in five minutes, and interval is round trip time divided by the number of cars, which is what a passenger experiences as waiting time. Offices target twelve to fifteen percent handling capacity and an interval under thirty seconds.

Formulas

Handling capacity

Passengers per 5 min = 300 / RTT x 0.8 x car capacity x lifts; capacity percent = that / population

Interval

Interval = round trip time / number of lifts

Worked example

With the default values below, Lift Traffic Analysis Calculator returns Five minute handling capacity of 14.18%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Number of lifts in the groupminimum 1: 4
Car capacityminimum 2 people: 13 people
Round trip timeminimum 10 s: 110 s
Building populationminimum 1 people: 800 people

Results

Five minute handling capacity: 14.18% %
Passengers moved in five minutes: 113.5 people
Average waiting interval: 27.5 s
Service assessment: Good — meets typical office criteria

Step by step

1Values used
2Handling capacity
3Interval
4Five minute handling capacity= 14.18 %
5Passengers moved in five minutes= 113.5 people
6Average waiting interval= 27.5 s
7Service assessment= Good — meets typical office criteria

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.
Preliminary estimate only. Vertical transportation performance should be confirmed by simulation from a lift consultant.

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

Preliminary estimate only. Vertical transportation performance should be confirmed by simulation from a lift consultant.

Frequently Asked Questions

How is the Lift Traffic Analysis figure worked out?

Passengers per 5 min = 300 / RTT x 0.8 x car capacity x lifts; capacity percent = that / population. Lift group performance is judged on two numbers.

Can a longer round trip be offset by more lifts?

It improves interval but not handling capacity per car. Destination dispatch control shortens round trip time itself, which improves both at once.

What values do I need to enter?

This calculator takes 4 inputs: Number of lifts in the group, Car capacity, Round trip time, Building population. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.