About CameRoll

The moment this site is built for

You’re framing a shot and you need to know, right now, how much of it will actually be sharp — the flowers in front, the mountain behind, or just the eye you focused on. You change the aperture to fix your exposure and now you’re not sure what shutter speed keeps the picture the same. You’ve got a high-resolution file and a client asking for a large print, with no idea if it will hold up. You’re halfway through a long shoot doing the mental math on whether the memory card will last. You’re quoting a job and guessing at a day rate instead of actually pricing your hours, your editing time, and your expenses. Or you’re looking at a gear list — a body, two lenses, a flash — trying to see whether it fits what you actually budgeted.

None of these are glamorous questions, but they’re the ones that decide whether a shoot goes well. CameRoll exists to answer them with a calculator instead of a guess.

Six calculators, one job each

The Depth of Field Calculator takes your focal length, aperture, focus distance, and sensor format and returns the near and far limits of sharp focus, the total depth of field, and the hyperfocal distance — the same circle-of-confusion math behind every depth of field chart, run for your exact setup instead of a generic table.

The Exposure Calculator works the exposure triangle in both directions: give it aperture, shutter speed, and ISO to get the exposure value, or change one setting and see the shutter speed that holds the same exposure.

The Photo Print Size Calculator converts between pixel dimensions and physical print size at whatever DPI you choose, in inches or centimetres, and shows the megapixel count behind it — so you know before you order whether a file will actually print clean at that size.

The Storage Space Calculator estimates how much card or drive space your photos and video will need, or works backwards from a card’s capacity to tell you roughly how many shots it holds.

The Photography Pricing Calculator builds a quote from shoot hours, editing hours, your rate, expenses, and a profit margin, and returns the labor cost, subtotal, and total — a starting number for a quote, not a rate card.

The Camera Gear Cost Calculator adds up a kit item by item — bodies, lenses, accessories, quantities — and checks the total against a budget you set, so you can see what’s left or how far over you’ve gone before you buy.

Beyond the calculators

If you want the history and hardware behind the numbers, the Cameras & Photography Museum has galleries on camera types from DSLR to instant, the lenses and optics that gather the light, techniques from exposure to bokeh, and the history running from the camera obscura to the darkroom, drawn from Wikipedia and Wikimedia Commons. The blog and guides cover the same ground in longer form.

What this is — and isn’t

CameRoll is an independent, advertising-supported site, not affiliated with any camera manufacturer, print lab, or standards body it references. Every calculator runs on published photographic formulas — circle of confusion, the exposure equation, DPI-to-pixel conversion — but the output is only as good as the numbers you enter, and real-world results depend on your specific camera, lens, and conditions. Treat every result as an estimate to check against your own test shot, not a guarantee. The pricing calculator is a starting point for a quote, not business or financial advice — check your own costs, taxes, and local market before you send one.

Questions, corrections, or a tool you wish existed? Get in touch.