How long is 8 inches?
Eight inches equals 20.32 centimeters.
8 inch at actual size
Accurate after calibration. Approximate before calibration.
8-inch ruler from 0 to 8 inches.
Screen Calibration
Place a credit card against your screen and adjust until the on-screen card matches.
Conversions
How long is 8 inches compared to an object?
8-Inch Chef's Knife Blade
About 8 inchesAn 8 inch chef's knife is the mid-size in the range, between a 6 inch and a 10 inch blade. It is a general purpose knife for chopping, slicing and dicing.
Standard Round Cake Pan
About 8 inchesAn 8 inch round cake pan is one of the two most common sizes, with 9 inches. It bakes about 6 cups of batter.
8-Inch Adjustable Wrench
About 8 inchesAn 8 inch adjustable wrench covers nuts and bolts up to about 3/4 inch across the jaw. Adjustable wrenches are usually sold in 6, 8, 10 and 12 inch lengths.
Standard Dressmaker's Shears
About 8 inchesDressmaker's shears run 8 to 10 inches, against 5 to 7 for household scissors. The longer blade cuts fabric in longer strokes with fewer strokes.
Original 8-Inch Floppy Disk
About 8 inchesThe 8 inch floppy disk, the 1.2MB version, was the size that made them common. The 3.5 inch disk replaced it in the 1990s.
Standard Splash Cymbal
About 8 inchesAn 8-inch splash cymbal decays almost as soon as it is struck, which is why it sits above the toms rather than in their place. It is a jazz and rock effect cymbal, not a ride.
Small Lunch Paper Plate
About 8 inchesA small paper plate is 8 inches, a step up from the 6 inch and 7 inch sizes. It fits a sandwich and a small side.
8-Inch Tablet Screen
About 8 inchesAn 8 inch tablet is measured corner to corner, and is smaller than the 10 inch iPad. Most 8 inch tablets are Android or Amazon Fire.
Standard Handheld Tambourine
About 8 inchesA tambourine is measured by diameter across the head, and 8 inches is a common size. The sizes in use run from about 6 to 16 inches.
8-Inch Masonry Trowel
About 8 inchesAn 8 inch masonry trowel is a working size for spreading mortar. Smaller 4 and 6 inch trowels are for finishing and tight corners.
Frequently asked questions about 8 inches
Is 8 inches close to A4 paper?
Very: A4 is 8.27 inches wide and US letter is 8.5 inches wide, so 8 inches sits just under one sheet's width either way.
How does 8 inches compare to a tablet?
Compact tablets such as the iPad mini use a 7.9-inch screen measured diagonally, so 8 inches is a hair more than a small tablet's diagonal.
How many centimeters is 8 inches?
20.32 centimeters.
What can I use to check 8 inches?
A US letter sheet is 8.5 by 11 inches: lay its short edge along the ruler and the 8-inch mark sits half an inch inside the paper.
Page last updated 2026-10-02
