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 |
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.
Educational planning tool. 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.