A well-stocked first aid kit needs about 10 core items to handle the most common injuries: cuts, scrapes, burns, sprains, and allergic reactions. The American Red Cross recommends nearly 20 categories of supplies for a family of four, but you can build a highly functional kit around 10 essentials that cover the vast majority of situations you’re likely to face at home, in the car, or outdoors.
The 10 Essential Items
Here’s what belongs in every basic first aid kit, whether you’re assembling one from scratch or checking what you already have:
- Adhesive bandages (assorted sizes): The workhorse of any kit. Stock at least 25 in a mix of small, medium, and large sizes to cover everything from a child’s scraped knee to a deeper finger cut. The Red Cross recommends assorted sizes for a family of four.
- Sterile gauze pads: For wounds too large for a bandage. Keep both 3×3-inch and 4×4-inch pads on hand. The smaller size works well for standard cuts and abrasions, while the larger size handles burns, heavily bleeding wounds, or injuries that need multiple layers of dressing.
- Medical adhesive tape: Holds gauze pads and dressings in place. A single roll of cloth tape (1 inch wide, 10 yards long) is the standard. If anyone in your household has sensitive skin, swap in paper tape, which is hypoallergenic and gentler. Waterproof tape is a better choice for kits that travel outdoors or to sporting events.
- Antibiotic ointment: Applied to minor cuts, scrapes, and burns to help prevent infection. Five single-use packets are the Red Cross recommendation. These have a shelf life of about two years, so check dates when you audit your kit.
- Antiseptic wipes: Used to clean the skin around a wound or to disinfect your hands before treating someone. A common misconception is that rubbing alcohol or hydrogen peroxide should go directly on an open wound. They actually damage tissue and slow healing. The best approach for an open wound itself is cool running water and mild soap for at least five minutes. Antiseptic wipes are better suited for cleaning the surrounding skin.
- Disposable nitrile gloves: Protect both you and the injured person from infection. Modern kits use nitrile rather than latex because up to 6% of the population has a latex allergy, which can cause reactions ranging from skin rashes to difficulty breathing. Nitrile gloves are also more puncture-resistant and won’t interfere with wound healing the way powdered latex gloves can. Keep at least two pairs in your kit.
- Scissors or trauma shears: You need a way to cut tape, gauze, clothing, or bandages. Trauma shears are the better investment: their blades are angled at about 150 degrees with a blunt tip that slides safely against skin, so you can cut through clothing or a seatbelt without risking further injury. The serrated lower blade grips tough materials like denim without slipping.
- Tweezers: Essential for removing splinters, ticks, and small debris from wounds. A clean removal reduces infection risk significantly. Keep them in a small plastic sleeve to stay sanitary.
- Instant cold compress: A squeeze-to-activate pack that gets cold without refrigeration. Invaluable for sprains, strains, bumps, and swelling. Since these are single-use, consider stocking two.
- Pain relievers: Over-the-counter options like acetaminophen, ibuprofen, or aspirin address headaches, pain, fever, and minor sprains. The Red Cross includes two packets of low-dose aspirin (81 mg each), which can also be critical during a suspected heart event. If your household includes children, keep a children’s formulation as well.
Helpful Additions Beyond the Core 10
Once you have the essentials covered, a few extra items make a noticeable difference. A roller bandage (3 or 4 inches wide) wraps around limbs to secure gauze or apply light compression to a sprain. Triangular bandages double as arm slings or can tie a splint in place. An emergency blanket, the thin metallic kind that folds down to pocket size, retains body heat during shock or exposure.
Antihistamine tablets handle allergic reactions from insect stings or contact with plants like poison ivy. Hydrocortisone cream soothes rashes and itching. A non-mercury oral thermometer helps you track a fever. And a printed first aid instruction card is more useful than you’d think in a high-stress moment when your hands are shaking and your mind goes blank.
For workplaces specifically, the national safety standard (ANSI/ISEA Z308.1-2021) defines two classes of kits. Class A covers common injuries like cuts, burns, and eye injuries. Class B kits add a splint and tourniquet and increase quantities of everything else for higher-risk or more populated environments.
Keeping Your Kit Ready
A first aid kit you packed three years ago and forgot about may not work when you need it. Antibiotic ointment, burn cream, and alcohol wipes all expire within about two years. Sterile gauze pads last longer, up to five years, but only if the packaging stays sealed and undamaged. Set a reminder to check your kit every six months: replace anything expired, restock items you’ve used, and make sure adhesive bandages haven’t dried out or lost their stickiness.
Store your kit in a cool, dry place away from direct sunlight, which degrades medications and adhesives faster. If you keep one in your car, remember that temperature extremes in a trunk or glove compartment can shorten the life of ointments and medications considerably. A kit in the house and a second, smaller one in the car is a practical setup for most families.