How do you calculate travel time savings from slotting?

Multiply the picks you reroute by the labor cost saved per pick, then by the realized travel reduction percentage, and subtract the fixed slotting setup fee. With 4,000 picks at $0.18 each, a 70% realized reduction and a $1,200 setup fee, that is 4,000 x 0.18 x 0.70 - 1,200 = -$696 for the period measured.

Why is the setup fee added instead of subtracted?

The setup fee is subtracted so the headline is true net benefit for the period. The labor recovered here is $504 against a $1,200 one-time fee, so the first period nets -$696; because the fee is one-time, later periods keep the full $504 and the project breaks even after about 2.4 periods.

What is a good travel reduction percentage?

Well-run velocity-based reslots typically capture 20-40% travel reduction on the affected picks; 70% is aggressive and usually only seen when correcting badly slotted zones or introducing golden-zone assignments for the fastest movers.

What does savings per pick tell me?

It is net savings divided by picks rerouted. Here -$696 / 4,000 = -$0.17 per pick in the first period (the setup fee dominates), rising to $0.126 per pick once the fee is paid off.

Travel time savings vs. slotting ROI, which should I use?

Use Travel Time Savings to size the annual or per-wave labor benefit; use Slotting ROI when you need payback period and multi-year net value against the full investment.

How often should I recompute this?

Recompute each time your item velocity mix shifts materially, typically quarterly, because slotting drifts and the realized reduction percentage erodes as fast movers migrate.

WMS, Warehouse Labor & Fulfillment calculator

Travel Time Savings Calculator

Travel Time Savings quantifies the labor dollars a warehouse recovers when it reslots inventory so pickers walk shorter paths. In most manual pick operations, walking is 50-60% of a picker's clock, so shaving a fraction of that travel translates directly into fewer paid picking hours. Slotting engineers, WMS analysts, and DC operations managers use this to justify a slotting project or a re-slot wave before committing labor and software spend. It matters because travel is the single largest non-value-added cost in discrete order picking.

What this calculator does

Estimate the labor dollars recovered when optimized pick paths and slotting cut walking time across a fulfillment shift.
A warehouse manager evaluating a slotting or pick-path optimization project sizes the labor savings before committing to the re-slot.
Computes total labor savings from rerouted picks (picks x cost per pick x realized reduction %) plus the fixed slotting setup fee, and the blended savings per pick.

Formula used

Net savings = picks rerouted x labor cost per pick saved x realized reduction% - slotting setup fee
Savings per pick = total savings / picks rerouted

Inputs explained

Picks rerouted per shift:
Labor cost per pick saved:
Realized travel reduction:
Slotting setup fee:

How to use the result

Use it when building the business case for a slotting change, a golden-zone re-slot, or a WMS travel-optimization module before you commit picker hours.
It credits only travel labor at a flat per-pick rate; it ignores congestion, replen interference, and the fact that realized reduction usually decays as slotting drifts out of alignment over the year.

Current U.S. benchmarks

On-highway diesel averages $5.65 per gallon this week (EIA), trending up over recent periods. Truck tonnage is up 0.8% year over year (ATA via FRED).
Manufacturing hourly earnings average $30.35 (BLS, Jul 2026), up 4.2% from a year earlier. Median machinist pay is $28.24/hr (OEWS 2025), with state medians on each state page. Manufacturers have 481k open positions nationally (BLS JOLTS).

Common questions

How do you calculate travel time savings from slotting? Multiply the picks you reroute by the labor cost saved per pick, then by the realized travel reduction percentage, and subtract the fixed slotting setup fee. With 4,000 picks at $0.18 each, a 70% realized reduction and a $1,200 setup fee, that is 4,000 x 0.18 x 0.70 - 1,200 = -$696 for the period measured.
Why is the setup fee added instead of subtracted? The setup fee is subtracted so the headline is true net benefit for the period. The labor recovered here is $504 against a $1,200 one-time fee, so the first period nets -$696; because the fee is one-time, later periods keep the full $504 and the project breaks even after about 2.4 periods.
What is a good travel reduction percentage? Well-run velocity-based reslots typically capture 20-40% travel reduction on the affected picks; 70% is aggressive and usually only seen when correcting badly slotted zones or introducing golden-zone assignments for the fastest movers.
What does savings per pick tell me? It is net savings divided by picks rerouted. Here -$696 / 4,000 = -$0.17 per pick in the first period (the setup fee dominates), rising to $0.126 per pick once the fee is paid off.
Travel time savings vs. slotting ROI, which should I use? Use Travel Time Savings to size the annual or per-wave labor benefit; use Slotting ROI when you need payback period and multi-year net value against the full investment.

Last reviewed 2026-08-11.