Convert 1/4 inches to millimeters
"Fractional Inches to Millimeters" Calculator
How many millimeters in 1/4 inches?
Answer
1/4″ = 6.35 mm
= 0.25″ · decimal inches
Exact: 1″ = 25.4 mm by definition (1959), and a ruler fraction converts without rounding. If the thread is marked G 1/4 (BSPP), its basic outside diameter is 13.157 mm (ISO 228-1): the inch size of a pipe thread is nominal.
1 ÷ 4 = 0.25; 0.25 × 25.4 = 6.35 mm
Neighbouring sizes
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Fractional Inches to Millimeters Conversion Table
FAQ
How many millimeters in 1/4 inches?
1/4″ = 6.35 mm
What is the formula to convert 1/4″ to millimeters?
The formula is: mm = (numerator ÷ denominator) × 25.4. For 1/4″: (1 ÷ 4) × 25.4 = 6.35 mm.
What is the nearest whole millimeter to 1/4″?
1/4″ = 6.35 mm; the nearest whole millimeter is 6 mm, 0.35 mm less.
See Also
- 1" in millimeters
- 1/2" in millimeters
- 1/3" in millimeters
- 1/5" in millimeters
- 1/6" in millimeters
- 1/7" in millimeters
- 1/8" in millimeters
- 1/9" in millimeters
- 1/10" in millimeters
- 1/11" in millimeters
- 1/12" in millimeters
- 1/13" in millimeters
- 1/14" in millimeters
- 1/4" в миллиметрах
- 1/4" en milímetros
- 1/4" em milímetros