Convert 1 Inch to Millimeters

How long is 1 inch? How far is 1 inch in millimeters? 1 in to mm conversion.

Amount

From

To

swap units ↺

1 Inch =

25.4 Millimeters

exact result

Decimal places

Result in Plain English

1 inch is equal to exactly 25.4 millimeters.

Result as a Fraction

1 inch

= ¹²⁷⁄₅ millimeters

= 25 and ²⁄₅ millimeters

In Scientific Notation

1 inch

= 1 x 10⁰ inches

= 2.54 x 10¹ millimeters

Inches

An inch is a unit of length equal to exactly 2.54 centimeters. There are 12 inches in a foot, and 36 inches in a yard.

Abbreviation: in

Millimeters

A millimeter, or millimetre, is a unit of length equal to one thousandth of a meter.

Abbreviation: mm

Inches to Millimeters Conversions

results may be rounded

in	mm
1.00	25.4
1.01	25.654
1.02	25.908
1.03	26.162
1.04	26.416
1.05	26.67
1.06	26.924
1.07	27.178
1.08	27.432
1.09	27.686
1.10	27.94
1.11	28.194
1.12	28.448
1.13	28.702
1.14	28.956
1.15	29.21
1.16	29.464
1.17	29.718
1.18	29.972
1.19	30.226
1.20	30.48
1.21	30.734
1.22	30.988
1.23	31.242
1.24	31.496
1.25	31.75
1.26	32.004
1.27	32.258
1.28	32.512
1.29	32.766
1.30	33.02
1.31	33.274
1.32	33.528
1.33	33.782

in	mm
1.34	34.036
1.35	34.29
1.36	34.544
1.37	34.798
1.38	35.052
1.39	35.306
1.40	35.56
1.41	35.814
1.42	36.068
1.43	36.322
1.44	36.576
1.45	36.83
1.46	37.084
1.47	37.338
1.48	37.592
1.49	37.846
1.50	38.1
1.51	38.354
1.52	38.608
1.53	38.862
1.54	39.116
1.55	39.37
1.56	39.624
1.57	39.878
1.58	40.132
1.59	40.386
1.60	40.64
1.61	40.894
1.62	41.148
1.63	41.402
1.64	41.656
1.65	41.91
1.66	42.164
1.67	42.418

in	mm
1.68	42.672
1.69	42.926
1.70	43.18
1.71	43.434
1.72	43.688
1.73	43.942
1.74	44.196
1.75	44.45
1.76	44.704
1.77	44.958
1.78	45.212
1.79	45.466
1.80	45.72
1.81	45.974
1.82	46.228
1.83	46.482
1.84	46.736
1.85	46.99
1.86	47.244
1.87	47.498
1.88	47.752
1.89	48.006
1.90	48.26
1.91	48.514
1.92	48.768
1.93	49.022
1.94	49.276
1.95	49.53
1.96	49.784
1.97	50.038
1.98	50.292
1.99	50.546