Gage Block Stack for 12.345 mm

Fewest-block stack, 88-piece metric set

10 + 1.34 + 1.005 = 12.345 mm

3 blocks. Checked: the block sizes add up to exactly 12.345 mm.

This is the stack for a 12.345 mm gage block height, worked for the 88-piece metric set (and checked against the 112-piece set). For reference, 12.345 mm is about 0.48602 in.

Step by step

Add the blocks from the finest increment to the thickest. After each block the "left to build" column shows what the remaining blocks must make up; it reaches 0 on the last block.

Block added	Stack height	Left to build
1.005	1.005	11.340
1.34	2.345	10.000
10	12.345	0.000

Other stacks for 12.345 mm (88-piece metric set)

9.5 + 1.34 + 1.005 + 0.5 (4 blocks)
9 + 1.34 + 1.005 + 1 (4 blocks)
9 + 1.34 + 1.004 + 1.001 (4 blocks)

More blocks means more wrung joints, so the shortest stack above is the one to prefer. These alternates help if a block in your set is missing or worn.

The same size in a 112-piece metric set

With the 112-piece metric set the fewest-block stack is 10 + 1.34 + 1.005 = 12.345 mm, 3 blocks, which is the same number of blocks than the 88-piece metric stack.

How to use this stack

Pull the 3 blocks listed from your 88-piece metric set and check the sizes marked on each one.
Wring the thickest blocks together first and add the thinner ones last. See how to wring gage blocks.
Let the stack and the part reach the same temperature before measuring (temperature correction).

Check 12.345 mm in the free gage block calculator →

Prefer it filled in? Open the calculator with this size and set selected. Free, no login, works on a phone.

Quick answers

What gage block stack makes 12.345 mm?

With the 88-piece metric set, stack 10 + 1.34 + 1.005. The blocks add up to exactly 12.345 mm.

How many gage blocks do I need for 12.345 mm?

The 88-piece metric set builds 12.345 mm with 3 blocks, the fewest possible from that set.

Can the 112-piece metric set build 12.345 mm?

Yes: 10 + 1.34 + 1.005, 3 blocks.