Learn how to make a megaphone from cardboard with simple tools. This step-by-step DIY cardboard megaphone tutorial includes dimensions and is perfect for crafts, school projects, or events.
Step-by-Step Instructions: How to Make a Cardboard Megaphone
Materials Needed
- Cardboard (medium thickness)
- Pencil
- Ruler or measuring tape
- Scissors or craft knife
- Glue or strong tape
- Optional: paint, markers, or decorative paper
Step 1: Draw the Cone Template
On a piece of cardboard, draw a large curved triangle (sector shape):
- Radius (length): about 12 inches (30 cm)
- Bottom width: about 18½ inches (47 cm)
- Angle: roughly 45°
This shape will form the megaphone cone.
Step 2: Cut Out the Template
Carefully cut along the outer lines of the cardboard template using scissors or a craft knife.
Step 3: Form the Cone
Roll the cardboard into a cone shape:
- Narrow end opening: about 1½ inches (4 cm)
- Wide end opening: about 8½ inches (22 cm)
Overlap the edges slightly and secure them with glue or tape.
Step 4: Make the Handle (Optional)
Cut a small cardboard strip:
- Length: 4–5 inches (10–12 cm)
- Width: 1½ inches (4 cm)
Fold and glue it to the bottom side of the megaphone for easier holding.
Step 5: Reinforce the Edges
Add extra tape or glue along the seam and around the mouth opening to make the megaphone sturdier.
Step 6: Decorate
Paint or decorate your megaphone with markers, stickers, or colored paper. Let it dry completely before use.
Step 7: Test Your Megaphone
Speak into the narrow end and enjoy the amplified sound!
Tips
- Thicker cardboard produces better sound projection
- A smoother inner surface improves clarity
- Great for school projects, sports events, theater props, or crafts
