F-Number Calculator
Choose a Camera/Film Size:
Full Frame (24mm x 36mm)
6x4.5 (56mm x 41.5mm)
6x6 (56mm x 56mm)
6x7 (56mm x 69mm)
6x9 (56mm x 84mm)
4x5 (102mm x 127mm)
5x7 (127mm x 178mm)
8x10 (203mm x 254mm)
Print Width:
Print Height:
Unit:
Inch
Centimeter
Enter DPI:
Choose Constant:
Practical (1800)
Theoretical (1490)
Calculate F-Number