16 × 20 photo measures 406.4 × 508 mm. Its pixel dimensions change with PPI; the physical trim size does not.
Quick answer
A 16 × 20 inch print measures 406.4 × 508 mm and needs 4800 × 6000 pixels at 300 PPI. It uses the same 4:5 shape as 8 × 10 and crops about 16.7% of a 3:2 camera image when filled.
300 PPI: 4800 × 6000 px · 28.8 megapixels
Pixel table
16 × 20 pixels by PPI
Portrait values are rounded to the nearest whole pixel after converting the native physical dimensions.
PPI
Width
Height
Use context
72
1152 px
1440 px
Layout or screen reference
96
1536 px
1920 px
Layout or screen reference
150
2400 px
3000 px
Print / distance dependent
240
3840 px
4800 px
Print / distance dependent
300
4800 px
6000 px
Detailed print target
600
9600 px
12000 px
Detailed print target
Large-print range
Resolution changes the file requirement
A 16 × 20 needs 2400 × 3000 px at 150 PPI, 3840 × 4800 px at 240 PPI or 4800 × 6000 px at 300 PPI.
An image already composed at 4:5 fits both 8 × 10 and 16 × 20 by shape. The larger print still needs twice as many pixels along each edge for equal PPI.
Calculated resultsUpdates as you change the inputs
16 × 20 pixel dimensionsPrimary result
4800 × 6000 px
Trim sizeResult
406.4 × 508 mm
Trim size in inchesResult
16 × 20 in
16 × 20 at common targets
Target
Width
Height
150 PPI
2400 px
3000 px
240 PPI
3840 px
4800 px
300 PPI
4800 px
6000 px
Print setup
Trim first. Add production values second.
16 × 20 identifies the final physical format. Bleed expands the artwork beyond that edge; a safe margin moves important content inward. Those extra values depend on the print provider.