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How the trackout mat calculator works
How to Size a Trackout Mat Construction Entrance
The calculator above sizes a trackout mat system for your construction entrance in seconds — pick a layout, enter your number of exits, and it returns the exact mat count, accessories, and total weight. This guide explains the sizing math behind it, how a trackout control mat compares to a rock construction entrance, and how to spec a compliant, mud-free site exit.
How Many Trackout Mats Do You Need?
Every DiamondTrack trackout mat is 7 ft × 12 ft and covers 84 ft². To size a construction entrance by hand, take the scrub-zone area and divide by 84:
Mats needed = (Exit Width × Exit Length) ÷ 84
Round up to the next whole mat. The calculator above does this automatically and adds the right stakes and stud plates for each layout.
Most crews plan a trackout control mat zone 12–24 ft wide and 24–48 ft+ long, depending on soil type and traffic. Fine, sticky soils and wet seasons call for a longer scrub zone — when in doubt, add length. Here are common construction entrance layouts and the mats each one takes:
| Construction entrance layout | Width × Length | Total area | Trackout mats needed |
|---|---|---|---|
| Single-lane exit | 12 ft × 36 ft | 432 ft² | 6 mats (1 wide × 3 long) |
| Single-lane, longer scrub zone | 12 ft × 48 ft | 576 ft² | 7 mats (1 wide × 4 long) |
| Dual-lane exit | 24 ft × 36 ft | 864 ft² | 11 mats (2 wide × 3 long) |
| Dual-lane, heavier conditions | 24 ft × 48 ft | 1,152 ft² | 14 mats (2 wide × 4 long) |
Tip: each active egress point needs its own trackout mat system — enter the number of entrances/exits in the calculator and it multiplies the mats and accessories for you.
What Is a Trackout Mat?
A trackout mat — also called a trackout control mat, rumble mat, or construction mud mat — is a pad placed at a construction entrance or exit to knock mud and sediment off tires before vehicles reach the public road. It's a soil-tracking-prevention device that keeps dirt on-site and roadways clean.
DiamondTrack is a reusable HDPE composite trackout mat. Its raised diamond profile flexes and scrubs each tire so material drops in the scrub zone instead of getting tracked out. Because it's a construction tracking pad you clean and reuse, it replaces the rock pile that a traditional stabilized construction entrance needs — no delivery, spreading, or hauling away.
Reusable, not consumable: lift it, pressure-wash it, and redeploy it from job to job.
Compliant by design: commonly used as the "stabilized construction exit" BMP called out in a SWPPP.
Trackout Mat vs. Rock Construction Entrance
A rock construction entrance (aggregate over a stone base) is the traditional stabilized construction entrance. It works, but it scatters into the mud, needs constant replenishing, and has to be removed at the end of the job. A reusable trackout mat solves the same problem with less waste and lower lifetime cost.
Reusable trackout mat
- Installs in minutes on a compacted base
- Clean and reuse across multiple jobs
- No aggregate to deliver, spread, or haul off
- Consistent tire scrub over the mat's life
Rock construction entrance
- Requires stone delivery and grading
- Sinks into mud and needs replenishing
- Must be removed at project close-out
- Performance drops as rock displaces
Trackout Control & SWPPP Compliance
Most construction sites operate under an NPDES permit and a site-specific SWPPP (Stormwater Pollution Prevention Plan). These typically require a stabilized construction entrance to control sediment track-out onto public roads. Trackout mats are a widely accepted, reusable way to meet that construction entrance requirement.
- Check your SWPPP first: confirm the specified BMP (mat, rock exit, or wheel wash) and any required dimensions.
- Cover every egress point: each entrance/exit that vehicles use needs its own trackout control at the roadway edge.
- Keep it working: pressure-wash the mat when buildup reduces the tire scrub, and log inspections as your plan requires.
Note: requirements vary by state, municipality, and permit. Always follow your project's approved SWPPP and local stormwater rules for the exact stabilized construction entrance detail.
Trackout Mat Calculator FAQs
How many trackout mats do I need for my construction entrance?
Divide your scrub-zone area (width × length in feet) by 84 ft² per mat and round up. A single-lane 12 ft × 36 ft exit takes 6 mats; a dual-lane 24 ft × 36 ft exit takes 11. The calculator above sizes it instantly and adds the right accessories.
Are trackout mats an alternative to a rock construction entrance?
Yes. A reusable trackout mat is a common rockless option for a stabilized construction entrance — no aggregate to deliver, replenish, or remove. Your SWPPP should confirm the specific BMP your site is expected to use.
What size is a DiamondTrack trackout mat?
Each mat is 7 ft × 12 ft × 3.75 in, covers 84 ft², weighs about 435 lb, and is rated up to ~800 psi per diamond feature (subsurface-dependent). It's HDPE composite — reusable and recyclable.
Do trackout mats need stakes or plates?
On a firm, level base, mats can often sit unanchored. Where turning forces are high, add 18″ double-head stakes to pin mats down and stud plates to join them at seams and 4-way junctions. The calculator can add these automatically.
How much does a trackout mat construction entrance weigh?
About 435 lb per mat. A 6-mat single-lane exit is roughly 2,610 lb; an 11-mat dual-lane exit is about 4,785 lb. The calculator shows total system weight so you can plan handling and equipment.
Related searches: trackout mats, trackout control mat, construction mud mats, mud mats for construction, stabilized construction entrance, rock construction entrance, construction tracking pad, soil tracking prevention device, SWPPP construction exit, construction entrance requirements.
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Use the calculator above for an exact mat count, or contact us for volume pricing on multi-entrance projects — every order ships free.