Truck mattress sizes in Australia range from approximately 81×200cm (32×79 inches) for narrow berths up to 107×203cm (42×80 inches) for premium and double-bunk upper berths, and none of these match standard Australian domestic mattress sizes, which is why measuring your actual berth before ordering is the only reliable approach.
If you’re a long-haul driver, fleet manager, or owner-operator replacing a worn truck mattress, this guide covers every dimension, measurement method, and material consideration you need to get it right the first time.
Why Truck Mattress Sizes Don’t Match Standard Australian Sizes
Australian domestic mattresses follow standard dimensions: single (92×188cm), king single (107×203cm), double (138×188cm), and so on. Truck sleeper berths were designed to maximise usable cabin space, not to match household sizing conventions.
The result: every truck brand, and every model within the same brand, uses different berth dimensions. A Volvo VNL and a Freightliner Cascadia have different berth widths even when both run 80-inch lengths. A Peterbilt 389 upper berth and lower berth take different widths on the same truck.
This is the gap most truck mattress guides miss: Australian operators searching for replacement mattresses are being directed to US-based size charts without any conversion to metric or acknowledgment that import trucks arriving in Australia carry different configurations than their domestic US counterparts. Always measure in millimetres and convert rather than trusting an inch-based chart alone.
Standard Truck Mattress Sizes: Inches and Centimetres
| Size Name | Inches | Centimetres | Common Use |
| Narrow Berth | 32 × 79 | 81 × 201 | Older day cabs, compact sleepers |
| Standard Single | 35 × 79 | 89 × 201 | Standard single-berth configurations |
| Mid-Size | 36 × 80 | 91 × 203 | Most common across all major manufacturers |
| Full Berth | 38 × 80 | 97 × 203 | Mid-roof sleepers, common in Kenworth and Mack |
| Wide Berth | 42 × 80 | 107 × 203 | Upper bunks, premium sleepers, Freightliner Condo |
The 36×80 inch (91×203cm) size is the most common across modern sleeper cabs. If you genuinely cannot measure and need a starting point, that’s it, but confirm before ordering.
Truck Mattress Sizes by Make and Model
These dimensions reflect the most common configurations. Year, trim level, factory options, and aftermarket modifications can change berth dimensions even on the same model.
| Make / Model | Berth | Size (inches) | Size (cm) |
| Freightliner Cascadia | Upper | 42 × 80 | 107 × 203 |
| Freightliner Cascadia | Lower | 36 × 80 | 91 × 203 |
| Freightliner Century/Columbia | Single | 36 × 80 | 91 × 203 |
| Peterbilt 579 | Upper | 42 × 80 | 107 × 203 |
| Peterbilt 579 | Lower | 36 × 80 | 91 × 203 |
| Peterbilt 389 | Upper | 42 × 80 | 107 × 203 |
| Peterbilt 389 | Lower | 35 × 79 | 89 × 201 |
| Kenworth T680 | Upper | 42 × 80 | 107 × 203 |
| Kenworth T680 | Lower | 36 × 80 | 91 × 203 |
| Kenworth W900 | Upper | 42 × 80 | 107 × 203 |
| Kenworth T880 | Single | 36 × 80 | 91 × 203 |
| Volvo VNL 760/860 | Upper | 42 × 80 | 107 × 203 |
| Volvo VNL 430/630/670 | Single | 36 × 80 | 91 × 203 |
| Volvo 610 / VNR | Single | 36 × 76 | 91 × 193 |
| Mack Anthem | Upper | 42 × 80 | 107 × 203 |
| Mack Anthem / Pinnacle | Lower/Single | 36 × 80 | 91 × 203 |
| International LT | Upper | 42 × 80 | 107 × 203 |
| International LT / Lonestar | Lower/Single | 36 × 80 | 91 × 203 |
| Western Star 5700XE | Upper | 42 × 80 | 107 × 203 |
| Western Star 4900 | Single | 36 × 80 | 91 × 203 |
How to Measure Your Sleeper Berth Correctly
The law label sewn onto your existing mattress is the fastest starting point. It lists finished dimensions including length, width, and height. Photograph it before disposal.
If the label is missing, or the existing mattress fits poorly, measure the berth platform directly:
Step 1: Remove the old mattress completely. You’re measuring the sleeping platform, not the worn mattress on top of it.
Step 2: Measure width at both ends. Head end and foot end. Sleeper berths are not always perfectly rectangular. Note both measurements. If they differ, order to the smaller dimension.
Step 3: Measure length along both sides. Wall side and open side. Again, note any difference.
Step 4: Check for corner cuts or curves. Many berths, particularly at the foot end near the cab wall, have angled or rounded corners. If yours does, trace the corner onto cardboard before ordering. A mattress that doesn’t account for corner cuts won’t sit flat.
Step 5: Measure vertical clearance. Measure from the sleeping platform to the upper bunk, ceiling panel, or reading light above. This determines your maximum mattress thickness.
Step 6: Note your truck’s make, model, year, and sleeper type. Even if you provide exact measurements, this helps a manufacturer confirm your specs and flag any known configuration anomalies for your model.
Tolerance: Work to a 15mm tolerance on all measurements. A slightly undersized mattress creates gaps. One that’s oversized won’t sit flat and puts stress on the mattress edges.
What Mattress Thickness Works in a Truck?
Factory truck mattresses are 100–130mm (4–5 inches) thick. This is the primary reason most truck drivers sleep poorly. That profile is simply inadequate for sustained support over a long haul.
| Thickness | Best For |
| 100–130mm (4–5 inch) | Factory replacement only, short-term use |
| 150–175mm (6–7 inch) | Most drivers, good comfort-to-clearance balance |
| 200–225mm (8–9 inch) | Lower berths, single-bunk setups, drivers over 95kg |
The practical ceiling is determined by your measured vertical clearance minus 50–75mm for comfortable entry and exit. Don’t sacrifice headroom for mattress depth.
Foam Density
Foam density is the measurement of how much material is packed into each cubic foot of foam, directly determining how well it resists permanent compression, supports body weight, and maintains its shape over years of regular use.
Size gets all the attention. Foam density determines whether your mattress still performs after 12 months of daily use.
Factory truck mattresses use foam at 1.2–1.5 lb/ft³ density. At this density, foam develops permanent body impressions within 6–12 months of regular use. The mattress doesn’t fail visibly. It gradually hammocks until you’re sleeping in a curved depression every night.
Replacement mattresses should use foam at 1.7–1.9 lb/ft³ density minimum for standard drivers, and higher for drivers over 95kg. At this density, foam retains its support profile for three to five times longer than factory-spec alternatives.
A fact you should know
Most truck mattress size guides in Australia treat this as a sizing problem only. It isn’t. A correctly-sized low-density foam mattress still fails within a year. A correctly-sized high-density foam mattress, or a natural latex alternative, holds its support profile for years of heavy road use. For Australian operators running long-haul routes, foam density is a fleet cost issue as much as a driver comfort issue.
Natural latex offers the best combination of density, durability, and ventilation for drivers running through northern Queensland’s humidity or the heat of the Nullarbor. Open-cell latex structure breathes in ways closed-cell polyfoam never can, which matters significantly in a sleeper cab that can hit 40°C+ during summer.
Do Standard Domestic Sheets Fit Truck Mattresses?
No. Standard Australian single sheets (92×188cm) don’t fit a 91×203cm or 107×203cm truck mattress properly. You need sheets cut to your mattress dimensions. This is a practical detail most buyers don’t consider until the mattress arrives.
When ordering your truck mattress, order fitted sheets to match the same dimensions simultaneously.
When to Order a Custom Truck Mattress
Order custom if:
- Your berth measurements don’t match any standard size in the chart above
- Your berth has corner cuts, curves, or irregular edges
- You’re running an older Australian-specification or converted vehicle
- You need a split mattress for a berth with a centre hinge or fold mechanism
- Your driver is over 120kg and needs higher-density specification than standard builds provide
Our custom mattress service builds truck sleeper mattresses to your exact measurements, including corner cuts, tapered widths, and non-standard lengths, from the same factory that has been manufacturing Australian-made mattresses since 1939.
If you need a standard size without custom shaping, our Truck Foam Mattress covers the most common berth dimensions at a direct-from-factory price without retail markup.
Frequently Asked Questions
What is the most common truck mattress size in Australia?
36×80 inches (91×203cm). This fits the majority of modern single-berth sleeper cabs across Freightliner, Kenworth, Mack, International, and Volvo models. Always measure to confirm.
Can I use a standard Australian single mattress in a truck?
No. A standard Australian single measures 92×188cm. Most truck berths run 203cm (80 inches) in length, making a standard single 15cm too short. The width mismatch varies by model.
What happens if I order the wrong size?
A mattress too small shifts in the berth, disrupting sleep and creating unsafe movement. A mattress too large buckles at the edges, damaging internal support structure and degrading performance faster.
How thick should a replacement truck mattress be?
Between 150mm and 225mm (6–9 inches) for most applications. Measure your vertical clearance first. Leave at least 50mm of headroom above the mattress surface for comfortable access.
How long should a quality truck mattress last?
A high-density foam or natural latex truck mattress should last 3–5 years under heavy use. Factory-spec low-density mattresses fail within 12 months of daily use.
Rockdale Mattress Factory builds custom truck sleeper mattresses to your exact berth measurements from our Padstow factory. Contact us with your truck make, model, berth measurements, and any corner details. We’ll confirm specifications and build to order.