🧱 Drill Bit Sizes Decoded: What Those Fractions Actually Mean
🛠️ Ever Wonder What 17/64" Actually Means?
If you’ve ever stared at a drill bit set and thought,
"Is 5/64" smaller than 3/32"?
You're not alone.
Most drill bit sizes are written in fractions, and unless you’re fresh off a geometry test, they can feel confusing.
But once you understand how sizes work and which ones to actually use, you’ll never waste time or crack tile again.
🔢 Fraction Breakdown: Small to Big
Let’s simplify a few common sizes:
| Fraction | Decimal | In Plain Terms |
|---|---|---|
| 1/16" | 0.0625 | Very small, great for pilot holes or delicate work |
| 5/64" | 0.0781 | Slightly larger, often used on sheet metal |
| 3/32" | 0.0938 | Common for plastics or light woodworking |
| 1/8" | 0.1250 | General-purpose, everyday use |
| 3/16" | 0.1875 | Great for tile, anchors, and mid-size jobs |
| 1/4" | 0.2500 | Popular for structural anchors and concrete |
| 1/2" | 0.5000 | Heavy-duty use, large bolts or installs |
You’ll often see 64ths like 11/64" or 17/64" because certain materials require extra precision.
🎯 Choosing the Right Size
Here’s what works best for each material:
Woodworking
Use Brad Point bits for sizes up to 1/2". They drill straight and don’t wander.
Tile, Porcelain, Marble
Use a V-Groove Tile Bit. Sizes like 3/16" or 1/4" are popular for these materials.
Metal
Go with TiN-Coated Jobber Bits. These are durable, heat-resistant, and come in precise fractional sizes.
Quick Tip
If your anchor is 1/4", drill with a 3/16" or 7/32" bit depending on material density.
🧠 Pro Insight
Using a bit that’s too big can ruin your job. Start smaller and step up if needed.
Just like cooking, it’s easier to add than take away. Same goes for hole sizes.
🛒 Shop by Size Without Guesswork
We make it easy.
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Filter products by exact fractional size
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Choose from 1 Pack, 5 Pack, or Bulk 25 Pack
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Fast and reliable U.S. shipping
📘 Final Thoughts
Now that you know what those tiny fractions actually mean, you’ll never second-guess your drill bit again.
Drill smarter, not harder.
