How many mm is 5/8 inch?

5/8 inch is 15.875 mm exactly. 5/8 × 25.4 = 15.875. The decimal form is 0.625 inch. 16 mm is 0.125 mm larger.

What is 5/8 inch in mm?

5/8 inch in mm is 15.875 mm (1.5875 cm). Searches for 5/8 inch to mm use this conversion.

Is 16 mm the same as 5/8?

No. 5/8 inch is 15.875 mm. 16 mm is 0.125 mm larger, so a 16 mm wrench or drill is slightly big on a 5/8 in fastener.

No. 5/8 inch is 15.875 mm; 16 mm is 0.125 mm larger. Use 15.875 mm when the size must match.

5/8 inch to mm

Decimal: 0.625 inch

5/8 inch (0.625 inch) = 15.875 mm exactly (1.5875 cm). The international inch is 25.4 mm, so multiply the inch value by 25.4.

Inches (in) — decimals or fractions Millimeters (mm)

Millimeters: 15.875
Decimal inches: 0.6250
Nearest 1/64: 5/8 in (exact on 1/64)
Feet + inches: 0 ft 0.625 in

The inches fraction result is rounded to the nearest 1/64 fraction.

5/8 inch to mm conversion

5/8 inch (0.625 inch) × 25.4 = 15.875 mm. Reverse: 15.875 ÷ 25.4 = 0.625 in.

5/8 inch to mm calculator

Use the converter at the top. Type a decimal or a fraction (1/16, 3 1/2). Millimeters update from the same engine as the inch to mm hub (1 in = 25.4 mm).

How to convert 5/8 inch to mm

Write the length as a decimal inch if needed: 5/8 in = 0.625 in (0.625 inch).
Multiply by 25.4: 0.625 × 25.4 = 15.875 mm.
Optional centimeters: divide millimeters by 10 → 1.5875 cm.

Nearest metric size

The nearest metric size is 16 mm, 0.125 mm larger than 15.875 mm.

A 16 mm wrench or drill is 0.125 mm larger than 5/8 inch (15.875 mm). It is close, not the same size. Use 15.875 mm when the fastener or hole has to match 5/8 in.

5/8 inch is 15.875 mm, not a whole millimeter. Whole-millimeter neighbors:

15 mm is 0.875 mm smaller than 5/8 inch.
16 mm is 0.125 mm larger than 5/8 inch.

Nearby inch fractions

Sixteenth-inch steps from the same 1 in = 25.4 mm factor. Linked rows have their own pages. The full fraction table is on inch to mm.

Inches	Decimal	Millimeters
3/8 in	0.375	9.525 mm
7/16 in	0.4375	11.1125 mm
1/2 in	0.5	12.7 mm
9/16 in	0.5625	14.2875 mm
5/8 in	0.625	15.875 mm
11/16 in	0.6875	17.4625 mm
3/4 in	0.75	19.05 mm
13/16 in	0.8125	20.6375 mm
7/8 in	0.875	22.225 mm

Other inch fractions to mm

FAQ

How many mm is 5/8 inch?
5/8 inch is 15.875 mm exactly. 5/8 × 25.4 = 15.875. The decimal form is 0.625 inch. 16 mm is 0.125 mm larger.
What is 5/8 inch in mm?
5/8 inch in mm is 15.875 mm (1.5875 cm). Searches for 5/8 inch to mm use this conversion.
Is 16 mm the same as 5/8?
No. 5/8 inch is 15.875 mm. 16 mm is 0.125 mm larger, so a 16 mm wrench or drill is slightly big on a 5/8 in fastener.
Is 5/8 inch 16 mm?
No. 5/8 inch is 15.875 mm; 16 mm is 0.125 mm larger. Use 15.875 mm when the size must match.