01
Inches
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Feet
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Converter of the Day
12 inches = 30.48 cm
Today's pick is Inches to CM — the one everyone looks up. One inch is exactly 2.54 cm, so a 12-inch ruler measures 30.48 centimeters. Formula: cm = inches × 2.54.
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IN→CM
Inches to CM
Convert inch measurements to centimeters for screens, sizes and craft projects.
CM→IN
CM to Inches
Turn centimeters into inches when a size chart lists metric first.
FT→IN
Feet to Inches
Break feet down into inches for heights, rooms and lumber.
KG→LB
KG to LBS
Convert kilograms to pounds for luggage, gym plates and body weight.
G→OZ
Grams to Ounces
Convert recipe and parcel grams into ounces.
M→FT
Meters to Feet
Convert meters to feet for room sizes, heights and distances.
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From the blog
Latest guides
Short guides that show what a measurement actually looks like — with real objects, not just numbers.
12″
Inches
How Long Is 12 Inches
Exactly one foot — the length of a standard ruler. See it next to everyday objects so the size sticks.
FT
Feet
What Is Measured in Feet
Room sizes, ceiling heights, lumber and people's heights — the everyday things still measured in feet.
IN
Inches
How to Measure Inches Without a Ruler
No ruler handy? A dollar bill is 6.14 inches long, and a bank card helps too. The tricks that actually work.
CM
Centimeters
What Is a Centimeter
One centimeter is 0.3937 inches — about the width of a fingernail. What it is, and where it is used.
MM
Millimeters
4 MM to Inches
4 mm is 0.1575 inches — a fraction most rulers do not even mark. The exact answer, plus the nearest fractions.
1mm
Millimeters
What Does 1 Millimeter Look Like
About the thickness of a paperclip's wire — the smallest mark on a metric ruler, made visible.
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