First Aid Kit Calculator
Kit contents from employee count and workplace hazards.
About this calculator
This calculator applies ANSI Z308.1 first aid kit sizing conventions alongside OSHA's near-workplace access expectation. Two questions are handled separately: how many kits you need, and what each kit should contain. How many kits scales with Total employees, Number of floors, and Hazard Level together -- higher hazard workplaces get a lower employees-per-kit ratio (as few as 15 per kit for high-hazard settings versus 25 for low-hazard offices), so the same headcount needs more kits as hazard rises.
What each kit contains, by contrast, is driven entirely by Hazard Level and does not change with Total employees or Number of floors at all: a Class B (comprehensive) kit recommended for moderate or high hazard workplaces carries roughly double the bandages, antiseptic, and glove pairs of a Class A (basic) kit -- and a full 4x the gauze -- but a 50-person site and a 500-person site at the same hazard level stock identically-provisioned individual kits -- the larger site just needs more of them. Remote Location adds a flat trauma kit allowance reflecting longer expected EMS response time. This tool applies general ANSI/OSHA sizing conventions; always confirm against your specific state plan requirements and any industry-specific standards (like construction's more detailed first aid provisions) that may apply to your workplace.
Inputs
Results
First aid kits needed
3
Figures current as of 2026. Sources: ANSI/ISEA Z308.1-2021, American National Standard — Minimum Requirements for Workplace First Aid Kits and Supplies, 29 CFR 1910.151 (Medical services and first aid)
How to Use This Calculator
- Enter total employees at the workplace and select hazard level: low (office), moderate (warehouse), or high (manufacturing).
- Enter number of floors or separate work areas.
- Indicate whether the location is remote (>15 min from EMS).
- Read total first aid kits required per OSHA 1910.151 and ANSI Z308.1 guidelines.
- Review recommended kit contents, which scale with hazard classification alone -- the number of kits you need scales with employee count and floors instead.
What each input means
- Total employees
- Total number of employees at the workplace.
- Hazard Level
- Workplace hazard classification — higher hazard raises kit density and class.
- Number of floors
- Number of floors or separate work areas.
- Remote Location
- On if the workplace is more than 15 minutes from EMS response.
What each result means
- First aid kits needed
- Total number of first aid kits required.
- Kit Class
- ANSI Z308.1 kit class: Basic (Class A) for low hazard, Comprehensive (Class B) for moderate/high hazard.
- AEDs needed
- Recommended number of automated external defibrillators.
- Eye wash stations
- OSHA-required eye wash stations for chemical hazards.
- Initial setup cost ($)
- Total cost for initial first aid program setup.
- Annual replenishment ($)
- Estimated annual supply replenishment cost.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersTotal employees = 50, Hazard Level = 2, Number of floors = 1, Remote Location = 0 = 4 input(s) provided
- Calculate First aid kits neededFirst aid kits needed3 = 3
- Calculate Kit classKit classComprehensive (Class B) = Comprehensive (Class B)
- Calculate AEDs neededAEDs needed1 = 1
Figures and sources
- Class A / Class B workplace first aid kit contents and sizing (2026) — ANSI/ISEA Z308.1-2021, American National Standard — Minimum Requirements for Workplace First Aid Kits and Supplies
- Near-workplace first aid access when no infirmary, clinic, or hospital is nearby (2026) — 29 CFR 1910.151 (Medical services and first aid)
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
What determines how many bandages and supplies go in each kit?
Hazard Level alone. A Class B kit, recommended for moderate or high hazard workplaces, carries roughly double the bandages, antiseptic, and glove pairs of a Class A kit used for low-hazard settings -- and up to 4x the gauze -- and this per-kit content does not change with Total employees or Number of floors at all.
Why would a small office and a large warehouse at the same hazard level need identically stocked kits?
Because kit contents (bandages, gauze, antiseptic, gloves) scale only with Hazard Level in this model, not with headcount. A 50-person and a 500-person site at the same hazard level get kits with the same individual contents -- the larger site simply needs more total kits distributed across its floors, not richer-stocked ones.
How does hazard level change the number of kits I need?
Higher hazard settings use a lower employees-per-kit ratio -- as few as 15 employees per kit for high-hazard workplaces like manufacturing, versus 25 for low-hazard offices -- reflecting that higher-risk environments need first aid resources within closer reach. The same headcount produces more required kits as hazard level rises.
What does the Remote Location toggle actually add?
Turning it on adds a flat trauma kit allowance to the initial setup cost, reflecting that a workplace more than 15 minutes from EMS response needs more self-sufficient trauma supplies on hand than a site where paramedics can arrive quickly. It does not change the number of standard kits or AEDs recommended.
Is this calculator a substitute for checking my specific OSHA or state requirements?
No -- it applies general sizing conventions drawn from ANSI/ISEA Z308.1-2021 (the published national standard for workplace first aid kit contents) and the near-workplace access expectation in OSHA's 29 CFR 1910.151, but specific state OSHA plans and industry standards (construction, for example, has more detailed first aid provisions) can require more than this baseline. Use this as a planning starting point, then confirm against the requirements that actually apply to your workplace.
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