Which first aid kit does your workplace actually need? Answer five questions and this free selector maps your setting, headcount and hazards to an ANSI/ISEA Z308.1 class, a container format, a station count, and the add-on modules your hazard profile calls for. Stocked options live in workplace first aid kits.
How do you choose between a Class A and Class B first aid kit?
Short answer: match the kit class to the injury profile of the work, not the size of the budget. Class A covers the common injuries of lower-risk settings; Class B carries higher quantities plus a splint and a tourniquet for higher-risk environments. OSHA never names a class — 29 CFR 1910.151(b) requires supplies that are adequate for your hazards, and stocking to the matching Z308.1 class is the accepted way to show it. The selector below applies the same mapping our guides use.
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The selector applies the setting-to-class mapping from ANSI/ISEA Z308.1 practice and this site's first aid guides, plus the construction-specific duties in OSHA 29 CFR 1926.50. It recommends a starting point — the site's own hazard assessment always governs the final fill.
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Class A vs Class B at a glance
| Question | Class A | Class B |
|---|---|---|
| Injury profile | Common injuries of lower-risk work | Higher-risk or complex environments |
| Quantities | Baseline minimums | Higher minimums throughout |
| Items only Class B carries | — | Splint and tourniquet |
| Typical settings | Offices, retail, light service | Construction, manufacturing, remote or large-crew sites |
Which stocked kit matches your profile
The selector above maps your answers to a class and a format. This table names the specific kits reviewed here against each profile. The class column states only what the product’s own listing states — where a manufacturer does not name an ANSI class, we say so rather than infer one.
| Workplace profile | What Z308.1-2021 points to | Reviewed option | Class stated on its listing |
|---|---|---|---|
| Office, retail or light service, up to 25 people | Class A fill | First Aid Only 223-U, 25-person | Not stated — verify the fill against Class A minimums |
| Fixed facility around 50 people, lower risk | Class A fill, wall-mounted | EVERLIT CARE 202SFAK50 2-shelf cabinet | ANSI Class A, 50-person — stated |
| Construction or contractor crew, higher risk, 50 people | Class B fill — adds a splint and tourniquet | First Aid Only 90671, 50-person | ANSI Class B+ — stated |
| Large site or multiple crews, around 100 people | Class A or Class B, decided by hazard assessment | First Aid Only 91247 or 24/7 First Aid 59554 | Neither names a class — assess first, then verify the fill |
| Vehicles and mobile crews | Type III portable, water-resistant container | First Aid Only 9302-25M metal case | No named class — the fill predates the A/B classification |
| Severe-bleeding exposure: blades, machinery, public access | Outside Z308.1 — trauma response, in addition to a compliant kit | NAR Public Access Bleeding Control Kit | Not an ANSI class — tourniquet-based trauma response |
Reading the two ratings together: Class A and Class B describe the fill — which supplies, and how many of each. Type I through IV describe the container — indoor fixed, indoor portable, mobile water-resistant, or mobile industrial. A setting needs both specified. OSHA’s own rule, 29 CFR 1910.151(b), requires that adequate first aid supplies be readily available and never names a class; ANSI/ISEA Z308.1-2021 supplies the classes and sits in OSHA’s non-mandatory Appendix A as an example, not as an incorporated requirement.
Full comparison, picks and mounting guidance: ANSI Class A vs Class B first aid kits. The regulatory decode lives in OSHA first aid kit requirements, and once the kit is on the wall, the first aid kit inspection checklist keeps it defensible.
A selection aid, not an OSHA compliance determination: OSHA requires supplies appropriate to the workplace’s hazards and provides no universal employee-count formula for first-aid-kit contents or placement. OSHA does not approve or certify first aid kits — 29 CFR 1910.151 sets a general adequacy duty, and ANSI/ISEA Z308.1 is the voluntary consensus benchmark OSHA's non-mandatory Appendix A cites as an example. Kit-per-employee ratios shown are industry planning benchmarks, not codified federal rules. This tool does not replace a written hazard assessment or evaluation by a qualified safety professional.
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Built and reviewed by Steven Eaton, WC Safety. We curate and review industrial PPE against ANSI, NIOSH and OSHA standards.
Our methodology
The selector's mapping mirrors ANSI/ISEA Z308.1 class practice and the construction duties written in 29 CFR 1926.50, with the general industry duty at 29 CFR 1910.151. Kit-per-employee ratios are labeled as planning benchmarks because federal OSHA codifies none. We hold no safety certification, and this tool is not a substitute for professional judgment.
Why trust this page
WC Safety is an independent review site with no products of its own — nothing here is stocked, warehoused or shipped by us. Purchase links go to Amazon and earn an affiliate commission at no extra cost to you. This free tool is informational — it supports, and never replaces, a written program, a hazard assessment, or evaluation by a qualified safety professional.
Frequently Asked Questions
Does OSHA require a Class A or Class B first aid kit?
No. OSHA 1910.151 requires supplies adequate for your hazards and never names a class. ANSI/ISEA Z308.1 is the voluntary consensus benchmark OSHA's non-mandatory Appendix A cites as an example, and stocking to the matching class is the accepted way to show adequacy.
Is there such a thing as an OSHA-approved first aid kit?
No. OSHA does not approve, certify, or endorse any product. A listing that says OSHA-approved is describing the manufacturer's own positioning against the adequacy duty, not a government certification.
How many first aid kits does a workplace need?
Federal OSHA sets no kit-per-employee ratio. The widely used planning benchmark is one station per 25 employees or per 300 feet of separation, whichever needs more, plus one per crew on dispersed construction work.
What does a Class B kit add over Class A?
Higher minimum quantities across the fill, plus two item types Class A does not carry: a splint and a tourniquet.
What changes on a construction site?
1926.50 adds hard duties: a weatherproof container with individually sealed packages, a check before the kit goes out on each job and at least weekly on the job, and a certified first-aid-trained person on site when no clinic or hospital is reasonably accessible.
Does this selector replace a hazard assessment?
No. It produces a defensible starting point from your setting, headcount and hazards. The site-specific hazard assessment governs the final fill, and unusual hazards can require supplies no class minimum includes.
Researched and written by Steven Eaton, editor of WC Safety. Steven holds no safety certification and does not test products; this page reports what the regulations and the published standard say, with the gaps in that record marked. Last reviewed August 2026.