Cross Lap Jig - Calculator

This calculator is for your convenience in using the Rockler Cross Lap Jig. All measurements should be provided in inches. The cross-reference table is to match fractional inches to decimal inches or millimeters.

Measurement application diagram

Number of Cuts
Whole number only:
Dado Width
Fraction or decimal inches:   "
Board Length
Whole inches: " Fraction:


Cross-Reference

Inches Decimal
1/64 0.0156
1/32 0.0313
3/64 0.0469
1/16 0.0625
5/64 0.0781
3/32 0.0938
7/64 0.1094
1/8 0.125
9/64 0.1406
5/32 0.1563
11/64 0.1719
3/16 0.1875
13/64 0.2031
7/32 0.2188
15/64 0.2344
1/4 0.25
17/64 0.2656
9/32 0.2813
19/64 0.2969
5/16 0.3125
21/64 0.3281
11/32 0.3438
23/64 0.3594
3/8 0.375
25/64 0.3906
13/32 0.4063
27/64 0.4219
7/16 0.4375
29/64 0.4531
15/32 0.4688
31/64 0.4844
1/2 0.5
33/64 0.5156
17/32 0.5313
35/64 0.5469
9/16 0.5625
37/64 0.5781
19/32 0.5938
39/64 0.6094
5/8 0.625
41/64 0.6406
21/32 0.6563
43/64 0.6719
11/16 0.6875
45/64 0.7031
23/32 0.7188
47/64 0.7344
3/4 0.75
49/64 0.7656
25/32 0.7813
51/64 0.7969
13/16 0.8125
53/64 0.8281
27/32 0.8438
55/64 0.8594
7/8 0.875
57/64 0.8906
29/32 0.9063
59/64 0.9219
15/16 0.9375
61/64 0.9531
31/32 0.9688
63/64 0.9844
1" 1