Step van interior dimensions, 14 to 18 feet

These are walk-in bodies by Morgan Olson or Utilimaster on the Freightliner MT45 chassis. FedEx runs the 14 ft size as the P700 and the 18 ft size as the P1000, which is the most common step van on the used market. You can walk from the driver’s seat straight into the box.

Length is the flat floor behind the driver. The cab doors slide into pockets in the first 32 inches of each side wall.

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18 ft step van in section, looking forward. Bare interior, drawn to scale.

All sizes at a glance

Step van interior dimensions, 14 to 18 feet, bare interior and payload
MODEL	LENGTH	WIDTH	HEIGHT	BETWEEN WHEEL WELLS	PAYLOAD
14 ft step van	167″ (424 cm)	93″ (236 cm)	85″ (216 cm)	41″	5,000 lb
16 ft step van	191″ (485 cm)	93″ (236 cm)	85″ (216 cm)	41″	8,000 lb
18 ft step van	215″ (546 cm)	93″ (236 cm)	85″ (216 cm)	41″	9,800 lb

Bare interior from manufacturer and body-builder specs, before insulation or paneling. Payload figures are ratings where published and estimates where not. Real vehicles vary by an inch or two, so measure yours before you cut materials.

Size by size

14 ft step van

The 14 ft step van is 167 in (424 cm) long, 93 in (236 cm) wide and 85 in (216 cm) tall inside (13 ft 11 in of floor). About 41 in of floor runs between the rear wheel wells. With about 1 in of insulation and paneling on each surface, the inside is about 166 × 91 × 83 in. Payload is about 5,000 lb.

BARE INTERIOR L × W × H: 167 × 93 × 85″ (424 × 236 × 216 cm)
INSULATED AND PANELED, ABOUT: 166 × 91 × 83″
FLOOR LENGTH: 13 ft 11 in

The walk-in bread truck: a Morgan Olson or Utilimaster body on the Freightliner MT45. FedEx runs this size as the P700. Length is the flat floor behind the driver, and you walk from the seat straight into the box. The cab doors slide into pockets in the first 32″ of each side wall, and the rear wheel boxes leave a 41″ aisle between them.

Open the 14 ft step van in the planner →

16 ft step van

The 16 ft step van is 191 in (485 cm) long, 93 in (236 cm) wide and 85 in (216 cm) tall inside (15 ft 11 in of floor). About 41 in of floor runs between the rear wheel wells. With about 1 in of insulation and paneling on each surface, the inside is about 190 × 91 × 83 in. Payload is about 8,000 lb.

BARE INTERIOR L × W × H: 191 × 93 × 85″ (485 × 236 × 216 cm)
INSULATED AND PANELED, ABOUT: 190 × 91 × 83″
FLOOR LENGTH: 15 ft 11 in

A Morgan Olson or Utilimaster body on the Freightliner MT45, the length food trucks build on. Length is the flat floor behind the driver, and you walk from the seat straight into the box. The cab doors slide into pockets in the first 32″ of each side wall, and the rear wheel boxes leave a 41″ aisle between them.

Open the 16 ft step van in the planner →

18 ft step van

The 18 ft step van is 215 in (546 cm) long, 93 in (236 cm) wide and 85 in (216 cm) tall inside (17 ft 11 in of floor). About 41 in of floor runs between the rear wheel wells. With about 1 in of insulation and paneling on each surface, the inside is about 214 × 91 × 83 in. Payload is about 9,800 lb.

BARE INTERIOR L × W × H: 215 × 93 × 85″ (546 × 236 × 216 cm)
INSULATED AND PANELED, ABOUT: 214 × 91 × 83″
FLOOR LENGTH: 17 ft 11 in

The step van FedEx runs as the P1000, the most common walk-in on the used market: a Morgan Olson or Utilimaster body on the Freightliner MT45. Length is the flat floor behind the driver, and you walk from the seat straight into the box. The cab doors slide into pockets in the first 32″ of each side wall, and the rear wheel boxes leave a 41″ aisle between them.

Open the 18 ft step van in the planner →

Common questions

How wide is the aisle between a step van’s wheel boxes?+

About 41 inches. The rear wheel boxes take about 26 inches each from the 93-inch body width.

What is the difference between a P700 and a P1000?+

Length. FedEx uses the names for the 14 ft and 18 ft bodies. Width and height are about the same.

How much space do insulation and paneling take?+

The finished figures on this page allow about 1 inch per surface: each side wall, the ceiling, the floor, and the front wall. The rear is the door. A cold-climate build with thicker insulation takes more. In the planner you can choose the build-out level, or enter your own measurements.

CHOOSING YOUR VEHICLE

Step van conversions: a wide interior with a walk-through cab

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Updated 2026-10-14.