Convert 8 MM to Inches - Precision Calculator

Convert 8 millimeters to inches with precision control

Quick Answer
8 mm = 0.3150 in
โ‰ˆ 5/16" (fractional)
1 inch = 25.4 mm ยท 8 mm รท 25.4 = 0.3150 in

๐Ÿ“ Visual Size Comparison

Real-world comparison
About a peanut kernel
Scaled 1:0.18 mm = 0.3150" (5/16")
Millimeters (mm)508 mmInches (in)00.315"
Millimeter ticks
Inch ticks (1/16")
Note:The ruler is scaled down for large values.

Detailed Results

Decimal (4 places)
0.3150 in
Fraction (1/16")
5/16"
2 / 4 / 6 decimals
0.31 in ยท 0.3150 in ยท 0.314961 in
Reverse check
0.3150 in ร— 25.4 = 8 mm
0.3150 in
5/16"
8 mm = 0.3150 inches
Formula: 8 mm รท 25.4 = 0.3150 inches

Adjust Precision

Results at Different Precisions

2 Decimal Places
0.31 in
4 Decimal Places
0.3150 in
6 Decimal Places
0.314961 in

Fractional Inch Results

1/8" Precision
1/3"
1/16" Precision
5/16"
1/32" Precision
6/19"

๐Ÿชต Woodworking Application

For woodworking projects, 8 mm converts to approximately 5/16" when using 1/16" precision, which is standard for most woodworking measurements.

Common Wood Sizing:
Standard plywood or thin board

โš™๏ธ Engineering Application

In engineering contexts, 8 mm equals 0.314961 inches with high precision (6 decimal places) for accurate technical specifications.

Engineering Format:
8 mm (0.314961")

๐Ÿ›’ E-commerce Product Description

For online product listings, you can describe this measurement as:

Standard: Size: 8 mm (0.32 inches)
Approximate: Approx. 0.32" (8mm)
Dimension: 8mm / 0.32"

๐Ÿ–จ๏ธ 3D Printing Application

For 3D printing, 8 mm is the standard metric measurement. The imperial equivalent is 0.3150 inches.

3D Print Context:
Small component or connector size

Where This Size Is Used

Small sizes (< 10 mm)
  • Precision measurement and tolerances
  • Electronics components and connectors
  • Jewelry and craft parts
Medium sizes (10โ€“100 mm)
  • Common hardware and fasteners
  • Phones, tablets, and accessories
  • Furniture fittings and fixtures
Large sizes (> 100 mm)
  • Construction and building materials
  • Furniture dimensions and clearances
  • Engineering project measurements
8 mm is close to Phone thickness (7.5 mm)
8 mm is close to Coin thickness (1.5 mm)
8 mm is close to Notebook thickness (15 mm)

Quick Reference Table

MillimetersInches (Decimal)Inches (Fraction)
4.00 mm0.1575 in2/13"
6.00 mm0.2362 in3/13"
8.00 mm0.3150 in5/16"
10.00 mm0.3937 in2/5"
12.00 mm0.4724 in7/15"
16.00 mm0.6299 in5/8"

Frequently Asked Questions

How do I convert 8 mm to inches?

To convert 8 millimeters to inches, divide by 25.4 (the exact conversion factor). The result is 0.3150 inches.

What is 8 mm in fractional inches?

8 mm is approximately 5/16" when expressed as a fraction. This is commonly used in woodworking and construction.

Is this conversion accurate for engineering purposes?

Yes, our conversion uses the standard conversion factor (1 inch = 25.4 mm exactly) and supports up to 6 decimal places for high-precision engineering applications.

Need to Convert Different Values?

Use our interactive converter tool to convert any millimeter value to inches with real-time results.

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Quick Conversion Links

Popular millimeter and inch values with dedicated conversion pages.

Inches to MM Chart