Load density (kg/km): utilization without mixing drop size

What load density (kg/km) is

In Mexican operations, load density answers: how many kilograms “fit” into each kilometer you already ran? It is a key performance indicator (KPI) for network utilization — useful when you compare full truckload (FTL), less-than-truckload (LTL), or when you suspect you are paying distance without weight.

It does not measure whether the truck hit the appointment, or how much you left at each dock. It also does not replace logistics cost in pesos: a high kg/km with uncontrolled diesel and detention can still destroy margin.

Service context (not density): the 4th National Logistics Indicators Study 2026 (#SoyLogístico / LDM / EGADE) reports customer delivery fill rate near ~93% in its sample. Use it to calibrate fill expectations — not to invent a “world-class kg/km.”

Formula, units, and period

Freeze numerator, denominator, and window before you publish the number. If you mix estimated weight with incomplete GPS, kg/km becomes theater.

Density vs drop size, km/stop, and OTIF

Three route cousins and one service KPI. If you merge them into one dashboard cell, operations and finance will fight over the same number with different meanings.

FTL vs LTL vs capillary: what density means

The same kg/km reads differently by mode. In FTL you fill equipment and minimize empty miles. In LTL you watch consolidation. In capillary (many small stops), a “low” density is often the price of covering the map — not an automatic yard failure.

Empty miles: how they destroy density

Empty miles are kilometers you pay without generating loaded revenue. In the density formula they act as quiet poison: the denominator grows and the numerator does not.

• Full outbound + empty return: the full cycle dilutes kg/km versus measuring only the loaded leg — declare which one you report.
• Repositioning and false freight: “ready position” km also count if you include them in the universe.
• Comparing carriers: loaded-leg-only vs full-cycle reporters are not comparable.

If density falls month over month with the same shipped weight, audit empty miles and sequencing before blaming the spot rate.

How to read it in Mexico and by lane

On lanes such as Monterrey–Laredo, Bajío–border, or hinterland to Manzanillo, the national average hides the corridor that breaks you. Measure density by lane and by customer, not only the network roll-up.

Money link: low density with high distribution costs usually signals small stops, empty miles, or poor sequencing. High density with broken OTIF signals you optimized weight/km and forgot the appointment. National Study 2026 gives service context (fill rate ~93% sample); it does not publish an official kg/km benchmark — do not invent one.

How to measure it in 30 days

One month on one lane is enough to stop debating “feelings of utilization” and start deciding stowage, backhaul, or FTL vs LTL thresholds.

Common mistakes reporting kg/km

OCL and the utilization file

OCL Cargo is an autonomous transportation management system (TMS) with agents: it does not sell a “density dashboard” as the thesis. It ties documented weight, km (GPS / milestones), and evidence under one trip ID so kg/km is auditable. It coexists with your system of record; your team handles exceptions only. When fiscal scope applies, OCL can stamp invoices and Carta Porte — the payment file and the utilization file stop living in different chats.

Related reading

• Distribution KPIs for Mexico–U.S. — hub: formulas, OTIF, drop size, volatility, and the minimum board.
• Drop size — kg per stop.
• Km per delivery — route capillarity (km ÷ stops).
• Empty miles — the km that dilutes density.
• OTIF — on time and in full (service).
• Logistics cost · Distribution costs.
• Dispatch volatility (CV) — utilization’s sibling for fleet vs 3PL.

Frequently asked questions