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Workshop Conversion Charts

For woodworking, DIY projects, and precision work

Master your measurements! Whether you're converting metric tool specifications, working from international plans, or translating fractional measurements for digital tools, these workshop conversion charts are your essential reference.

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31 Workshop Charts
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Essential: Drill Bit Sizes
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⚡ Jump to:📏 Length (12)🔧 Tools (14)All Charts
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Essential Workshop Charts

The must-have conversion charts for every workshop. These are the most frequently used for DIY projects, woodworking, and precision work.

Drill Bit SizesWorkshop chart
NumberFractionDecimal (in)Millimeters
#80—0.01350.34
#50—0.07001.78
#521/16"0.06251.59
#413/32"0.09382.38
#225/32"0.15623.97
#113/16"0.18754.76
#713/64"0.20315.16
——0.25706.53
—3/8"0.37509.53
—1/2"0.500012.70
Essential

Drill Bit Sizes

Numbered, lettered, metric, and fractional drill bit reference.

SpecialWorkshopEngineeringhardwarewoodworking
  • Customizable range and precision
  • Multiple template styles

Why Essential: A woodworker's best friend! Quick reference for all standard drill bit sizes in fractions, decimals, and metric.

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Fraction → DecimalEducational
FractionDecimalPercent
1/640.01561.56%
1/320.03133.13%
1/160.06256.25%
1/80.125012.5%
3/160.187518.8%
1/40.250025%
5/160.312531.3%
3/80.375037.5%
1/20.500050%
3/40.750075%
Essential

Fraction to Decimal

Fractions from 1/64 to whole numbers for math education and precision cutting.

SpecialEducationWorkshopEngineeringeducationmathwoodworkingengineering
  • Customizable range and precision
  • Multiple template styles

Why Essential: Woodworking relies on fractions (1/4", 3/8", etc.). This converts to decimals for digital tools and CNC machines.

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Inches → MMWorkshop preset
Inches (fraction)Inches (decimal)MillimetersCentimeters
1/4"0.2506.350.64
1/2"0.50012.701.27
1"1.00025.402.54
1 1/2"1.50038.103.81
2"2.00050.805.08
2 1/2"2.50063.506.35
3"3.00076.207.62
4"4.000101.6010.16
5"5.000127.0012.70
6"6.000152.4015.24
Essential

Inches to MM

Imperial to metric conversions for hardware sizing and fabrication.

LengthWorkshopEngineeringhardwareengineering
  • Customizable range and precision
  • Multiple template styles

Why Essential: The opposite conversion you need. Perfect when working with metric tools and international specifications.

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MM → InchesPro template
MillimetersDecimal (in)Fraction (in)
0.50.0200
10.0391/16
6.350.2501/4
12.70.5001/2
190.7483/4
25.41.0001
38.11.5001 1/2
50.82.0002
76.23.0003
101.64.0004
Essential

MM to Inches Chart

Convert millimeters to inches with decimals and fractions for woodworking and engineering.

LengthWorkshopEngineeringmathengineeringwoodworking
  • Customizable range and precision
  • Multiple template styles

Why Essential: Essential for precision measurements. Convert metric blueprints to imperial measurements instantly!

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View all 31 workshop charts below↓
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All Workshop Conversion Charts (31)

Complete collection of conversions for woodworking, DIY, and precision projects

📏Length Conversions

12 charts
CM → InchesSizing helper
CentimetersMetersDecimal (in)Fraction (in)ft'-in
50.051.971 15/16"0'2"
100.103.943 15/16"0'4"
200.207.877 7/8"0'8"
300.3011.8111 13/16"1'0"
500.5019.6919 11/16"1'8"
700.7027.5627 9/16"2'4"
900.9035.4335 7/16"2'11"
1001.0039.3739 3/8"3'3"
1301.3051.1851 3/16"4'3"
1801.8070.8770 7/8"5'11"

CM to Inches Chart

Convert centimeters to inches with precision for international sizing and measurements.

LengthWorkshopEducationshoppingconstruction
Customize & Download
Inches → MMWorkshop preset
Inches (fraction)Inches (decimal)MillimetersCentimeters
1/4"0.2506.350.64
1/2"0.50012.701.27
1"1.00025.402.54
1 1/2"1.50038.103.81
2"2.00050.805.08
2 1/2"2.50063.506.35
3"3.00076.207.62
4"4.000101.6010.16
5"5.000127.0012.70
6"6.000152.4015.24

Inches to MM

Imperial to metric conversions for hardware sizing and fabrication.

LengthWorkshopEngineeringhardwareengineering
Customize & Download
Meters → FeetTravel preset
Meters (m)Feet (ft)Feet & InchesReference
0.51.641'8"—
13.283'3"~3 feet
1.85.915'11"Tall person
39.849'10"Standard ceiling
516.4016'5"Basketball hoop
1032.8132'10"One story
2065.6265'7"—
50164.04164'1"—
100328.08328'1"—
150492.13492'2"—

Meters to Feet

Height, elevation, and construction conversions from meters to feet.

LengthEducationWorkshopconstructiontravel
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🔧Tools & Specifications

14 charts
Tire SizesAutomotive
MetricDiamWidth
195/65R1525.0"7.7"
205/55R1624.9"8.1"
215/60R1626.2"8.5"
225/45R1725.0"8.9"
225/65R1728.5"8.9"
265/70R1731.6"10.4"
285/70R1732.7"11.2"
285/75R1632.8"11.2"
315/70R1734.4"12.4"
35x12.5R1735.0"12.5"

Tire Size Chart

Convert metric tire sizes (e.g., 285/75R16) to actual inches. Essential for trucks, off-road, and stance.

SpecialWorkshopEngineeringautomotive
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📐Other Conversions

5 charts

Workshop Conversion Guide

Mastering conversions in your workshop is essential for successful projects. Whether you're reading metric tool specifications, working from international plans, or converting measurements for digital tools, here's everything you need to know.

📏Understanding Metric vs Imperial Conversions

The two primary measurement systems in workshops are metric (millimeters, centimeters, meters) and imperial (inches, feet). Many projects require converting between them.

Quick Reference:

  • 1 inch = 25.4 mm (exact)
  • 1 foot = 0.3048 meters (exact)
  • 1 meter = 39.37 inches
  • 1 centimeter = 0.394 inches

Pro Tip: When working with precision (CNC, machining), remember that 25.4mm = exactly 1 inch. For less critical work, 25mm ≈ 1 inch is sufficient. Always use exact conversions when working with tight tolerances.

📐Fractions vs Decimals

Traditional woodworking uses fractional measurements (1/4", 3/8", 7/16"), while modern digital tools (CAD, CNC) use decimals. Understanding both systems is crucial.

Common Fractional Conversions:

1/8" = 0.125"
1/4" = 0.25"
3/8" = 0.375"
1/2" = 0.5"
5/8" = 0.625"
3/4" = 0.75"
7/8" = 0.875"
15/16" = 0.9375"

Workshop Tip: Keep a Fraction to Decimal chart at your CNC station or near your design computer. This is the #1 reference chart in professional woodworking shops!

🪛Understanding Drill Bit Sizes

Drill bits come in multiple sizing systems: fractional sizes (1/16", 3/32"), decimal sizes (#1-#80), and metric sizes (mm). Our chart shows all three systems so you can always find the right bit.

Drill Bit Systems:

  • Fractional: 1/16", 1/8", 3/16", 1/4" (common in traditional woodworking)
  • Numbered (#1-#80): Used for precision screws and machine work
  • Lettered (A-Z): Large holes and specialty work
  • Metric (mm): Standard in Europe and industrial settings

Shop Tip: Mount your Drill Bit Sizes chart above your drill press or hand drill station. This chart saves time and prevents using the wrong bit size. Many shops laminate and keep copies in multiple locations!

🔨Practical Workshop Scenarios

Scenario 1: Reading a European furniture plan in metric

The plan shows 500mm. Use your MM to Inches chart: 500mm ÷ 25.4 = 19.69 inches (approximately 19 11/16"). Your Fraction to Decimal chart confirms 11/16" = 0.6875".

Scenario 2: Using CNC with imperial specifications

Your CNC program needs decimal input. A 3/4" measurement from a traditional woodworking plan becomes 0.75" in your CAD software. Use your Fraction to Decimal chart to avoid errors.

Scenario 3: Finding the right drill bit

Your plan shows "drill 1/4" hole for wood screw". You need a slightly smaller pilot hole. Your Drill Bit Sizes chart shows the nearest metric equivalent is 6.35mm, or you can use #7 drill bit (0.201").

How to Use Workshop Charts

1

Select Charts You Need

Browse our Essential Workshop Charts or search for specific conversions. Choose the charts that match your project needs. Most woodworkers should have at least: Drill Bit Sizes, Fraction to Decimal, and MM to Inches.

2

Customize & Download

Click on any chart to customize the layout, sizing, and colors. Download as PDF for free. You can also create bundles of multiple charts in one file for convenience.

3

Print on Durable Material

Print on cardstock (65-110 lb) or heavy matte paper for durability. Avoid glossy paper as it can be slippery. For best results, use color printing to match your workshop aesthetic.

4

Laminate & Protect

Laminate with 3-5 mil pouches for workshop durability. Charts will resist dust, moisture, tool marks, and daily wear. You can write on laminated charts with dry-erase markers and wipe clean!

5

Install & Reference

Mount charts above workbench, inside toolbox, on clipboard, or near relevant equipment (CNC, drill press, etc.). Keep multiple copies in different workshop locations for convenience. Consider laminating and mounting a master set permanently.

Workshop Projects That Use These Charts

🪑 Furniture Making

Converting between imperial plans and metric tools, calculating precise measurements for joinery and assembly.

🏠 Home Renovation

Working with metric building codes, converting measurements for material orders, ensuring precise cuts.

🤖 CNC & Machining

Converting fraction-based designs to decimal format for CNC programming, achieving precision tolerances.

🎨 DIY & Hobby Projects

Finding right drill bits, scaling designs, converting between measurement systems for hobby work.

🔧 Tool Selection

Finding right drill bits, end mills, or tool sizes for specific hole dimensions and specifications.

📐 International Plans

Converting European or metric-based plans to imperial measurements for North American workshops.

Explore Other Use Cases

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Kitchen & Cooking

For home cooks and bakers working with recipes.

Explore 18+ Charts →
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Classroom & Education

Perfect for teachers, students, and parents.

Explore 15+ Charts →
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Engineering & Design

For engineers, architects, and designers.

Explore 12+ Charts →

Workshop Charts FAQ

Download Complete Workshop Bundle

Get all 31 workshop conversion charts in one PDF file. Perfect for printing, laminating, and keeping in your workshop for quick reference.

Bundle feature will be available soon. Download individual charts now!