DOT Hazmat Placard Calculator — 49 CFR § 172.504

Hazard Classes / Divisions Present in the Load

Check every hazard class or division actually being shipped. Table 1 materials placard at any amount; Table 2 materials placard only above the weight threshold below.

Table 1 — placard required at ANY amount

Table 2 — placard required only if aggregate ≥ 1,001 lb (454 kg)

Aggregate Gross Weight — Table 2 Materials

Only matters if you checked one or more Table 2 classes above. Total gross weight of ALL Table 2 hazmat packages on the vehicle (not the Table 1 materials — those placard regardless).

Aggregate gross weight of Table 2 hazmat (lb) Non-bulk packaging aggregate, highway/rail — per § 172.504(c). Bulk packagings placard regardless of weight.

Bulk packaging (cargo tank, portable tank, etc.) Bulk packagings placard for any Table 2 material regardless of weight — the 1,001 lb exception applies only to non-bulk packages, § 172.504(c).

Check a Table 2 class above to see how weight affects the result.

Result

Select at least one hazard class above.

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Required placards

Class / Division	Placard Name	Design Ref.

Source: Table 1, Table 2, and the placarding rules reproduced here are transcribed directly from 49 CFR § 172.504 ("General placarding requirements"), current eCFR. See also Cornell LII's mirror and PHMSA's hazmat program page for related sections (§172.505 subsidiary hazards, §172.519–172.560 placard specs).

How this tool works

DOT Hazmat Placard Calculator runs entirely in your browser. Inputs are evaluated with rules and constants taken from 49 CFR § 172.504 (Hazmat & dangerous goods). Nothing is uploaded to a server for the calculation itself.

Enter the values that match your load, vehicle, or scenario.
Results update live — treat them as a cited reference, not legal or professional advice.
Open the primary source linked at the top of this page before you rely on a number for compliance.

Use Copy link to share this page (including query parameters when the tool supports them) or Print for a dock/packet copy.

FAQ

Is the placard decision final for my load?

It applies 49 CFR § 172.504 table logic as implemented on the page. Always verify the current CFR, exceptions, and your DG paperwork.

Can I cite this in a claim or customer email?

You can share the link and the underlying public source. Do not present the tool as legal, medical, or insurance advice.

Can I cite this in a claim or customer email?

You can share the link and the underlying public source. Do not present the tool as legal, medical, or insurance advice.