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3/8 inch to decimal

The exact decimal value of 3/8 of an inch, with millimetres, centimetres and decimal feet — the numbers a tape or a caliper actually shows.

3/8 inch =

=0.375 in

Decimal inch

0.375"

Millimetres

9.525 mm

Centimetres

0.9525 cm

Decimal feet

0.03125 ft

How it's figured

3 ÷ 8

A fraction of an inch is just the top number divided by the bottom: 3 ÷ 8 = 0.375". For metric, one inch is exactly 25.4 mm, so 0.375" × 25.4 = 9.525 mm. TapeMath keeps this exact as a fraction internally, so it never drifts the way a rounded decimal can.

Fractions nearby

The steps around 3/8"

Fraction	Decimal inch	Millimetres
21/64"	0.328125	8.334375 mm
11/32"	0.34375	8.73125 mm
23/64"	0.359375	9.128125 mm
3/8"	0.375	9.525 mm
25/64"	0.390625	9.921875 mm
13/32"	0.40625	10.31875 mm
27/64"	0.421875	10.71562 mm

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