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Inch to mm Gage Block Stack Chart
Gage block stacks › Inch to mm chart
If you have a metric gage block set but the drawing is in inches, convert the size (1 in = 25.4 mm exactly) and build it from the metric set. This table does that for every half inch from 1/2 in to 8 in, using the 88-piece and 112-piece metric sets.
| Inches | Millimetres | 88-piece stack (mm) | 112-piece stack (mm) |
|---|---|---|---|
| 1/2 | 12.7 | 10 + 1.5 + 1.2 | 11.5 + 1.2 |
| 1 | 25.4 | 20 + 4 + 1.4 | 24 + 1.4 |
| 1 1/2 | 38.1 | 30 + 7 + 1.1 | 25 + 12 + 1.1 |
| 2 | 50.8 | 40 + 9.5 + 1.3 | 25 + 24.5 + 1.3 |
| 2 1/2 | 63.5 | 60 + 3.5 | 50 + 13.5 |
| 3 | 76.2 | 70 + 5 + 1.2 | 75 + 1.2 |
| 3 1/2 | 88.9 | 80 + 7.5 + 1.4 | 75 + 12.5 + 1.4 |
| 4 | 101.6 | 100 + 1.1 + 0.5 | 100 + 1.1 + 0.5 |
| 4 1/2 | 114.3 | 100 + 10 + 3 + 1.3 | 100 + 13 + 1.3 |
| 5 | 127 | 100 + 20 + 7 | 100 + 25 + 2 |
| 5 1/2 | 139.7 | 100 + 30 + 8.5 + 1.2 | 100 + 25 + 13.5 + 1.2 |
| 6 | 152.4 | 100 + 50 + 1.4 + 1 | 100 + 50 + 1.4 + 1 |
| 6 1/2 | 165.1 | 100 + 60 + 4 + 1.1 | 100 + 50 + 14 + 1.1 |
| 7 | 177.8 | 100 + 70 + 6.5 + 1.3 | 100 + 75 + 1.5 + 1.3 |
| 7 1/2 | 190.5 | 100 + 90 + 0.5 | 100 + 75 + 15.5 |
| 8 | 203.2 | 100 + 90 + 10 + 2 + 1.2 | 100 + 75 + 25 + 2 + 1.2 |
Each stack is the fewest-block stack found by the same solver the free calculator uses and adds up exactly to the millimetre size shown.
Convert and build any size in the free gage block calculator →
Prefer it filled in? Open the calculator with the set selected. Free, no login, works on a phone.
Related
- All gage block stack pages
- Gage block stack for 25.4 mm (1 inch)
- Metric gage block stacks guide
- Sine bar calculator (stack height for any angle)
- Gage block temperature correction
- How to wring gage blocks
- Gage block grades explained
Quick answers
What metric gage block stack makes 1 inch (25.4 mm)?
With the 88-piece set, stack 20 + 4 + 1.4; with the 112-piece set, stack 24 + 1.4. Both add up to 25.4 mm.
What metric gage block stack makes 2 inch (50.8 mm)?
With the 88-piece set, stack 40 + 9.5 + 1.3; with the 112-piece set, stack 25 + 24.5 + 1.3. Both add up to 50.8 mm.