pt: Point
pc: pica (12 pt)
in: inch (72.27 pt)
bp: Big point (72 bp = 1 in)
cm: Centimeter
mm: Millimeter
dd: Didot point (1157 dd = 1238 pt)
cc: cicero (12 dd)
sp: Scaled point (65536 sp = 1 pt), the smallest TeX unit
ex: Nominal x-height
em: Nominal m-width

box dimensions

1 inkscape pt = 1 TeX bp

1 sp = 1/65536 pt = 1/65536 1/72.27 in = 1/65536 72/72.27 bp

1000000 sp = 15,20178237858032 bp
15,20178237858032
30,4035647571606
45,605347135741
60,8071295143213
76,0089118929016
91,2106942714819
106,412476650062
121,614259028643
136,816041407223
152,017823785803
167,219606164384
182,421388542964
197,623170921544
212,824953300124
228,026735678705
243,228518057285
258,430300435865
273,632082814446
288,833865193026
304,035647571606
319,237429950187
334,439212328767
349,640994707347
364,842777085928
380,044559464508
395,246341843088
410,448124221669
425,649906600249