8.5 x 11 in Letter · 160 pages

160-page 8.5 x 11 in book: spine width & cover size

A 160-page 8.5 x 11 in paperback has a spine of 0.3603 in (9.15 mm) on white paper or 0.4 in on cream. Full cover with bleed: 17.61 x 11.25 in.

0.36 inSpine, white paper9.15 mm

0.4 inSpine, cream paper10.16 mm

17.61 x 11.25Full cover, inchesincl. bleed

393 gEstimated weight13.9 oz

Cover template (white paper)

Red: bleed (trimmed off) · dashed: 0.25 in safe zone · shaded: spine. Download a full-size template from the calculator.

Paper	Spine	Spine (mm)	Full cover (in)	Full cover (mm)	At 300 ppi
White paper, black ink	0.3603 in	9.15 mm	17.61 x 11.25 in	447.3 x 285.8 mm	5,283 x 3,375 px
Cream paper, black ink	0.4 in	10.16 mm	17.65 x 11.25 in	448.3 x 285.8 mm	5,295 x 3,375 px
Standard color (white)	0.3603 in	9.15 mm	17.61 x 11.25 in	447.3 x 285.8 mm	5,283 x 3,375 px
Premium color (white)	0.3755 in	9.54 mm	17.626 x 11.25 in	447.7 x 285.8 mm	5,288 x 3,375 px

Per-page factors are those published by KDP; IngramSpark and offset printers use their own paper calipers.

Paper PPI	Typical stock	Spine	Spine (mm)
350 PPI	Bulky / heavy stock (~70 lb text)	0.4571 in	11.61 mm
400 PPI	Cream book paper (~55 lb)	0.4 in	10.16 mm
444 PPI	White book paper (~50 lb)	0.3604 in	9.15 mm
500 PPI	Lightweight text (~45 lb)	0.32 in	8.13 mm
600 PPI	Thin text (~40 lb)	0.2667 in	6.77 mm

If your printer quotes pages per inch (PPI), spine = pages ÷ PPI. Ask for the exact PPI of your chosen stock.

Build the cover canvas at 17.61 x 11.25 in — or 5,283 x 3,375 px at 300 ppi.
The back cover runs from the left edge to 8.625 in; the spine from 8.625 to 8.985 in; the front cover after that.
Spine text is allowed — centre it and keep 0.0625 in clear on each side.
Keep titles and faces at least 0.25 in inside the trim; KDP places the barcode in a 2 x 1.2 in area at the lower right of the back cover.
Export as a flattened PDF (PDF/X-1a is safest) with fonts embedded.

Pages	Spine (white)	Spine (cream)	Full cover (white)
100 pages	0.2252 in	0.25 in	17.475 x 11.25 in
110 pages	0.2477 in	0.275 in	17.498 x 11.25 in
120 pages	0.2702 in	0.3 in	17.52 x 11.25 in
130 pages	0.2928 in	0.325 in	17.543 x 11.25 in
140 pages	0.3153 in	0.35 in	17.565 x 11.25 in
150 pages	0.3378 in	0.375 in	17.588 x 11.25 in
170 pages	0.3828 in	0.425 in	17.633 x 11.25 in
180 pages	0.4054 in	0.45 in	17.655 x 11.25 in
190 pages	0.4279 in	0.475 in	17.678 x 11.25 in
200 pages	0.4504 in	0.5 in	17.7 x 11.25 in
210 pages	0.4729 in	0.525 in	17.723 x 11.25 in
220 pages	0.4954 in	0.55 in	17.745 x 11.25 in

Spine width depends only on page count and paper; the cover width changes with the trim.

How wide is the spine of a 160-page 8.5 x 11 in book?

On white paper it is 0.3603 in (9.15 mm); on cream paper 0.4 in (10.16 mm), using KDP's per-page factors.

What size should the full cover be?

For white paper: 17.61 x 11.25 in (447.3 x 285.8 mm) including 0.125 in bleed on every side. For cream paper: 17.65 x 11.25 in.

Can I put text on the spine?

Yes. KDP allows spine text only for books with more than 79 pages; keep it at least 0.0625 in (1.6 mm) from each spine edge.

How heavy is a 160-page 8.5 x 11 in paperback?

About 393 g (13.9 oz) on white paper with a standard cover — useful for estimating postage.