Here’s a clear, beginner‑friendly guide on how to use a can opener , plus a few extra tips and safety notes.

What this covers

You’ll learn how to use:

  • A standard handheld (manual) can opener
  • A “safety” or side‑cut can opener
  • A basic electric can opener
  • A few safety tips so you don’t get cut

1. Using a standard handheld can opener

This is the classic style with two arms and a turning knob.

Step‑by‑step

  1. Set up the can and opener
    • Put the can on a flat, stable surface (like a counter).
    • Open the can opener’s arms so the cutting wheel and the little serrated (gear) wheel are apart.
  2. Attach the opener to the can
    • Place the cutting wheel on the top of the lid at the outer rim of the can.
    • Make sure the wheels are straight (not tilted in or out), sitting right on the metal rim.
    • Squeeze the arms together until you feel or hear a small “puncture” as the blade pierces the lid.
  3. Turn the knob to cut
    • Hold the can steady with your non‑dominant hand.
    • With your dominant hand, turn the knob clockwise.
    • The can will naturally rotate as the opener advances around the rim, cutting the lid as it goes.
  4. Finish the cut
    • Keep turning until you’ve gone all the way around.
    • You can either:
      • Cut fully around so the lid drops slightly into the can, or
      • Intentionally stop a few millimeters before your starting point so a tiny “hinge” of metal keeps the lid attached.
  5. Remove the lid safely
    • If the lid fell in: slide a butter knife under the edge and gently lift it up and out, keeping it away from your face and fingers.
    • If you left a hinge: lift the lid with a butter knife, then carefully fold it back with your fingers.
    • Avoid touching the cut edge directly; it can be very sharp.
  6. Dispose of the lid
    • After emptying the can, you can press the lid down into the empty can (carefully) so the sharp edge is contained for the trash.

Small tips

  • Most handheld openers are made for right‑handed use; left‑handed versions exist if you find it very awkward.
  • If the opener seems to “skip,” make sure the gear wheel is gripping the can’s rim and the opener is not tilted.

2. Using a safety (side‑cut) can opener

These are designed to cut the side of the lid seam rather than the top, often leaving a smoother, less sharp edge.

How to use it

  1. Place the can on the counter.
  2. Clamp the opener onto the outside edge of the can’s rim (the body of the can rather than the top surface).
  3. Turn the handle/knob. The opener rides around the outside seam, cutting horizontally.
  4. Once you’ve gone all the way around, release the opener.
  5. Lift the lid—some safety openers include small “lid pliers” or a gripping notch to pick the lid up without touching the metal.

Result: You usually get a lid and rim that feel much less sharp than with a traditional top‑cut.

3. Using an electric can opener

These are common as small appliances you keep on the counter.

How to use it

  1. Prepare
    • Plug in the opener.
    • Check where the cutting blade and magnet are (the magnet holds the lid as it’s cut).
  2. Position the can
    • Raise the lever.
    • Place the can so the rim sits between the cutting blade and the support wheel/guide.
    • The magnet should rest on top of the can’s lid.
  3. Start the cut
    • Push or lower the lever until it “locks in.”
    • You’ll hear the motor start; the blade punctures the lid and the can begins to rotate.
  4. Let it run
    • Most models stop automatically after one full revolution.
    • When it stops, hold the can with one hand and raise the lever with the other.
  5. Remove can and lid
    • Lift the can off the opener.
    • The lid is usually stuck to the magnet; gently pull it away and discard it safely.

Always keep fingers away from the blade area and the freshly cut lid edge.

4. Safety basics (for all can openers)

  • Watch the edges : The cut rim and lid are often sharp. Handle them like you would broken glass—carefully and deliberately.
  • Cut away from your body : Especially with manual or camping tools, aim the blade so if it slips, it moves away from you, not toward your hand or torso.
  • Keep the opener clean : Wipe or wash the cutting wheel and nearby parts after use so old food doesn’t build up and cause sticking or rust.
  • Replace if it skips constantly : If the opener struggles to bite into the metal or keeps slipping, the blade may be dull; replacing the opener is usually easier and safer than forcing it.

5. If your opener looks different

There are some specialty or travel‑style can openers (like tiny folding military P‑38/P‑51 openers or “church key” style tools):

  • Generally, you hook the tool on the can’s rim.
  • Use the pointed blade to puncture the lid near the rim.
  • Then move the tool a little at a time, repeating that puncture‑and‑lever motion around the can.

These are handy for camping or emergencies but require more hand strength and more care because the cuts are rougher and edges can be jagged.

Quick recap

  • Standard handheld: clamp on the rim on top, turn the knob, carefully remove the lid.
  • Safety opener: clamps on the side seam, makes smoother edges.
  • Electric: lever down, can rotates automatically, lid sticks to the magnet.
  • Always handle the cut lid and can edges with care.