How Many First Aiders Does a Workplace Need in the UK? (2026 Guide)

If you run a business in the UK, one of the most common questions is: how many first aiders do I legally need at work?

The answer isn’t always straightforward—but getting it right is essential for staying compliant, protecting your staff, and avoiding serious risk.

In this guide, we’ll break it down clearly—and show you the quickest way to calculate your exact requirements.

What Does UK Law Say About First Aid at Work?

Under the Health and Safety (First-Aid) Regulations 1981, all employers must provide:

• Adequate and appropriate first aid equipment

• Facilities for first aid

• Trained personnel

There is no fixed number of first aiders required. Instead, businesses must carry out a first aid needs assessment based on their workplace.

🚀 The Fastest Way to Work Out Your Requirements

Instead of guessing, you can use our free tool:

👉 Emergency Medics First Aid Needs Calculator

This simple tool:

• Calculates how many first aiders you need

• Recommends the correct level of training

• Gives you a clear, printable result

  
  

👉 It only takes a few minutes and removes the guesswork completely.

General Guidelines for First Aiders

While every workplace is different, typical guidance suggests:

Low-risk workplaces (offices, shops)

• Under 25 employees → 1 appointed person

• 25–50 employees → 1 trained first aider

• 50+ employees → 1 first aider per 100 staff

  
  

Higher-risk workplaces (construction, manufacturing)

• Under 5 employees → 1 appointed person

• 5–50 employees → 1 trained first aider

• 50+ employees → 1 first aider per 50 staff

  
  

👉 These are guidelines only—the calculator above gives you a far more accurate answer.

Why a First Aid Needs Assessment Matters

A proper assessment ensures your workplace is:

• Legally compliant

• Prepared for emergencies

• Properly staffed with trained personnel

  
  

Common Mistakes Businesses Make

Many organisations unknowingly fall short by:

• Training the bare minimum number of staff

• Not accounting for holidays or sickness

• Letting certificates expire

• Not reviewing their assessment regularly

  
  

👉 The easiest way to avoid these mistakes is to use a structured tool rather than guessing.

What Training Do You Need?

The most common workplace courses include:

• Emergency First Aid at Work (1 day)

• First Aid at Work (3 days)

• Paediatric First Aid (for childcare settings)

  
  

Need Help After Using the Calculator?

Once you’ve worked out your requirements, the next step is getting your team trained.

At Emergency Medics, we provide:

• On-site workplace first aid training

• Accredited courses delivered by experienced professionals

• Flexible training tailored to your business

  
  

👉 Get in touch today to book your training or discuss your results.

Final Thoughts

There’s no universal number of first aiders—but there is a clear process.

The safest and most effective way to get it right is to:

1. Assess your workplace properly

2. Use a reliable calculator

3. Ensure you have adequate cover at all times

   
   

👉 Start now using the Emergency Medics First Aid Needs Calculator and get instant clarity on what your business needs.