Photography
Depth of Field Calculator
Near and far focus limits, total depth of field and the hyperfocal distance for any lens.
H = f²/(N·c) + f
Also called dof calculator · focus distance calculator
Tech & Media · 8 calculators
Photography Calculators
Depth of field, exposure value, equivalent exposures, crop factor, hyperfocal distance, megapixels and print sizes.
Photography
Exposure Value Calculator
Exposure value from aperture, shutter speed and ISO, with the lighting it corresponds to.
EV = log₂(N² / t) − log₂(ISO / 100)
Also called ev calculator · exposure calculator
Photography
Equivalent Exposure Calculator
Swap aperture, shutter or ISO and keep the same exposure — the reciprocity triangle.
Every stop doubles or halves the light: t…
Also called exposure triangle calculator · stops calculator
Photography
Crop Factor Calculator
Equivalent focal length and aperture across sensor sizes, for matching field of view.
equivalent focal length = focal length × …
Also called equivalent focal length · sensor crop calculator
Photography
Hyperfocal Distance Calculator
The focus distance that keeps everything from half that distance to infinity sharp.
H = f² / (N × c) + f
Also called hyperfocal calculator · landscape focus distance
Photography
Megapixel Calculator
Convert between megapixels and image dimensions for any aspect ratio.
megapixels = width × height ÷ 1,000,000
Also called mp calculator · megapixels to resolution
Photography
Print Size Calculator
Largest good-quality print from an image, at any DPI, in inches and centimetres.
print inches = pixels ÷ DPI
Also called photo print size · max print size calculator
Photography
Photo Storage Calculator
How many photos fit on a card or drive, and the storage a shoot will need.
photos = usable capacity ÷ average file s…
Also called memory card capacity · how many photos fit
Key photography formulas
| Depth of Field | H = f²/(N·c) + f · near = d(H−f)/(H+d−2f) · far = d(H−f)/(H−d) |
|---|---|
| Exposure Value | EV = log₂(N² / t) − log₂(ISO / 100) |
| Equivalent Exposure | Every stop doubles or halves the light: t₂ = t₁ × 2^stops |
| Crop Factor | equivalent focal length = focal length × crop factor |
| Hyperfocal Distance | H = f² / (N × c) + f |
| Megapixel | megapixels = width × height ÷ 1,000,000 |
| Print Size | print inches = pixels ÷ DPI |
| Photo Storage | photos = usable capacity ÷ average file size |
Photography questions
How do I get more background blur?
Open the aperture, use a longer lens, move closer to the subject, or move the subject further from the background.