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Thickness reference

A quick reference for fractional inches, decimal inches and millimeters.

Use explicit dimensions when preparing a request. The values below are mathematical conversions, not a list of stocked or guaranteed thicknesses. Gauge systems vary by material; this reference intentionally uses dimensions.

Fractional-inch thicknesses converted to decimal inches and millimeters
Fraction (in)Decimal (in)MillimetersStart a cut list
1/320.031250.79375Use 1/32 in ↗
1/160.06251.5875Use 1/16 in ↗
3/320.093752.38125Use 3/32 in ↗
1/80.1253.175Use 1/8 in ↗
3/160.18754.7625Use 3/16 in ↗
1/40.256.35Use 1/4 in ↗
3/80.3759.525Use 3/8 in ↗
1/20.512.7Use 1/2 in ↗
5/80.62515.875Use 5/8 in ↗
3/40.7519.05Use 3/4 in ↗
1125.4Use 1 in ↗
1 1/41.2531.75Use 1 1/4 in ↗
1 1/21.538.1Use 1 1/2 in ↗
2250.8Use 2 in ↗

Links start a 6061 aluminum plate request with the selected thickness. Confirm the family, required condition and all other dimensions before submitting.

Conversion basis: 1 inch = 25.4 mm exactly. NIST — SI Units: Length.

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