Calculate Tap Drill Size Metric

Introduction & Importance

Calculating tap drill sizes in metric is crucial for ensuring the correct fit of screws and bolts in your projects. Our tool simplifies this process…

How to Use This Calculator

1. Enter the thread size in millimeters.
2. Enter the pitch in millimeters.
3. Click ‘Calculate’.

Formula & Methodology

The formula for calculating tap drill size is: D = P + (3 * t), where D is the drill size, P is the pitch, and t is the thread size…

ISO 261:2010 provides standards for metric screw threads.

Interactive FAQ

What if I don’t know the pitch?

You can estimate it using the formula P ≈ π * t, where P is the pitch and t is the thread size.