High: construction, oil and gas drilling and servicing, plants, sawmills, mining and the rest of Schedule 2 Table 3. Low: clerical and administrative work. Everything else is medium.
Under normal conditions, with the transport you have.
2
What 25 workers need
First aiders
1 Basic first aider
1 Intermediate first aider
First aid kits
Type 2 (basic) kit, medium
Room and equipment
No first aid room or extra equipment required.
Getting to care
A written plan for getting an injured worker to a health care facility, in place before work starts. The vehicle is readily available, takes a stretcher and a companion, protects from the weather and can contact the facility; a first aider other than the driver goes along unless there are 3 or fewer workers (OHS Code s.180).
Kits meet CSA Z1220-17 (s.178) and training follows CSA Z1210-17 (s.177). First aiders’ numbers are for the shift at all times.
As the crew grows
The same answers to the questions, at other headcounts. Your crew is highlighted.
WorkersFirst aidersKits and room
1
worker
No first aider required
Type 1 personal kit
5
workers
1 Basic first aider
Type 2 (basic) kit, small
10
workers
1 Basic first aider1 Intermediate first aider
Type 2 (basic) kit, small
20
workers
1 Basic first aider1 Intermediate first aider
Type 2 (basic) kit, medium
25
your crew
1 Basic first aider1 Intermediate first aider
Type 2 (basic) kit, medium
50
workers
2 Basic first aiders1 Intermediate first aider
Type 2 (basic) kit, large
100
workers
2 Basic first aiders2 Intermediate first aiders
Type 2 (basic) kit, largeA designated area for first aid services
200
workers
2 Basic first aiders2 Intermediate first aiders1 registered nurse with an advanced first aid certificate, or 1 advanced care paramedic
First aid room
500
workers
2 Basic first aiders2 Intermediate first aiders1 registered nurse with an advanced first aid certificate, or 1 advanced care paramedicand 3 more intermediate first aiders (1 for every 100 workers, or part, over 200)
A summary to plan with. The regulation and your employer's procedures govern.
Choose your province or territory, enter the number of workers and answer the questions that jurisdiction asks. The calculator gives the first aiders, kits, first aid room and transport its regulation requires, and shows what changes as the crew grows.
Three ways the rules are written
By hazard, distance and headcount: Alberta, BC, Manitoba, Nova Scotia and Yukon each have tables by the hazard of the work and the time to medical care.
By headcount: Ontario, Quebec, Newfoundland and Labrador, New Brunswick and federal workplaces mainly count workers.
By a written risk assessment: Saskatchewan, the Northwest Territories, Nunavut and PEI set the level from your first aid risk assessment, then apply minimum tables.
Count the workers the way your regulation does
Most count the workers on a shift; some count everyone at the site at any one time, and camps and lodging sites usually count everyone, on shift or off. The calculator says how your jurisdiction counts.
Keep it current
Certificates expire (usually after three years), kits are used and need restocking, and crews change size. Check first aid coverage for every shift, and when the crew, the work or the site changes. Our training and emergency preparedness services can help set it up.
Sources: Alberta OHS Code Part 11 and Schedule 2; BC OHS Regulation Part 3 and Schedule 3-A (from 1 November 2024); Saskatchewan OHS Regulations, 2020 Part 5; Manitoba Workplace Safety and Health Regulation Part 5; Ontario Reg. 1101; Quebec First-aid Minimum Standards Regulation (as amended by O.C. 37-2026); New Brunswick Reg. 2004-130; Nova Scotia Workplace Health and Safety Regulations Part 4; WCB PEI's guide to its first aid regulations; Newfoundland and Labrador OHS First Aid Regulations; Yukon OHS Regulations Part 18; NWT and Nunavut OHS Regulations; Canada Occupational Health and Safety Regulations Part XVI; CSA Z1220 and Z1210. Researched October 2026.
Frequently asked questions
How many first aiders do I need in Alberta?
It depends on the number of workers on the shift, the hazard of the work (low, medium or high, from Schedule 2 of the OHS Code) and how far the site is from a health care facility (close is 20 minutes or less, distant 20 to 40, isolated 40 or more). For example, a high hazard site with 30 workers that is distant needs 3 Intermediate first aiders, a medium Type 3 kit, and 3 blankets, a stretcher and splints.
What is a CSA Z1220 first aid kit?
CSA Z1220 is the Canadian standard for workplace first aid kits. A Type 1 personal kit is for a worker alone; a Type 2 basic kit is for lower-risk work; a Type 3 intermediate kit for higher-risk work. Kits come in small (2 to 25 workers), medium (26 to 50) and large (51 to 100). Most provinces and territories now require it; Ontario, Yukon and federal workplaces still use their own kit lists.
When is a first aid room required?
It varies: in Alberta, from 100 workers on high hazard work (200 on medium hazard); in Ontario, Nova Scotia and the federal rules, 200 or more; in Manitoba and New Brunswick, 100 or more; in BC, from as few as 50 workers on high hazard work. The calculator shows the rule for your jurisdiction and set-up.
What are the first aid levels in Canada now?
Most jurisdictions now use the CSA Z1210 levels: Basic, Intermediate and Advanced. They replaced the older Emergency and Standard first aid names: Basic is roughly the old Emergency course and Intermediate the old Standard. BC renamed its Level 1, 2 and 3 to Basic, Intermediate and Advanced in November 2024, and Ontario’s WSIB program followed in June 2026.
Keep first aid certificates and kit inspections in one place
TruStar Connect tracks every worker's first aid certificate and its expiry, your kit inspections and first aid records, and keeps them ready for your COR audit.
