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Millimeter to Inch Conversion Chart


For your convenience, the following chart provides a comparison of inches and millimeters.

Inches to Millimeters

Inch
(Decimal)

Millimeter
(mm)

Inch
(Fraction)

0.289

7.348

.

0.258

6.543

.

0.250

6.350

1/4

0.234

5.953

15/64

0.229

5.827

.

0.219

5.556

7/32

0.204

5.189

.

0.203

5.154

11/64

0.188

4.762

3/16

0.182

4.621

.

0.172

4.366

11/64

0.162

4.115

.

0.156

3.969

5/32

0.144

3.664

.

0.141

3.572

9/64

0.128

3.263

.

0.125

3.175

1/8

0.114

2.906

.

0.109

2.778

7/64

0.102

2.588

.

0.094

2.381

3/32

0.091

2.304

.

0.081

2.052

.

0.078

1.984

5/64

0.072

1.828

.

0.064

1.628

.

0.063

1.588

1/16

0.057

1.449

.

0.051

1.291

.

0.047

1.191

3/64

0.045

1.149

.

0.040

1.024

.

0.036

0.912

.

0.032

0.812

.

0.031

0.795

1/32

0.028

0.723

.

0.025

0.644

.

0.023

0.573

.

0.020

0.511

.

0.018

0.455

.

0.016

0.405

.

0.016

0.396

1/64

0.014

0.360

.

0.013

0.321

.

0.010

0.255

.

0.0089

0.226

.

0.0080

0.200

.

0.0071

0.180

.

0.0063

0.160

.

0.0056

0.142

.

0.0050

0.130

.

0.0045

0.114

.

0.0040

0.100

.