About this tool
Running out of storage on a trip is a modern heartbreak, because the moment you cannot capture is gone forever, and the card that is full always fills up at the most beautiful viewpoint. Photographers used to count film rolls; today we count gigabytes, but the planning problem is exactly the same. A travel photo storage calculator turns trip length, shooting rate and file format into a concrete number, so you pack the right cards and never face the dreaded card-full message at sunset.
The three inputs matter in different ways, and file format matters most of all. A JPEG photo typically uses about 8 megabytes, which means a thousand photos need about 8 gigabytes. A RAW photo uses about 30 megabytes, because it keeps all the sensor data for later editing, so the same thousand photos need about 30 gigabytes. HEIC, the format used by modern phones, is far more efficient at about 3 megabytes per photo, so a thousand phone photos need only about 3 gigabytes. Choosing RAW quadruples your storage need compared with JPEG, which is worth it for serious editing but wasteful for casual snapshots.
Shooting rate is the number most travellers underestimate, because holiday photography is bursty. A casual traveller shoots about 50 to 100 photos a day, a keen amateur shoots 200 to 300, and a dedicated photographer on a special trip can shoot 500 or more, especially when bracketing exposures or shooting wildlife. Burst mode multiplies this further, because a single burst can produce twenty near-identical frames in two seconds. PhotoStore uses your honest daily average, but if you shoot bursts, count each burst as ten photos rather than one, and your estimate will stay realistic.
Trip length multiplies everything, and long trips have a hidden trap: the longer the trip, the more likely you are to shoot more per day as you get into the rhythm of a place. A seven-day trip at 100 photos a day in JPEG needs about 5.5 gigabytes, which fits easily on one 32 gigabyte card. A fourteen-day trip at 200 photos a day in RAW needs about 82 gigabytes, which needs two 64 gigabyte cards or one 128 gigabyte card. The jump from a week to a fortnight, combined with a switch from JPEG to RAW, can multiply storage needs by fifteen times, which is why guessing fails.
Memory card strategy is about redundancy, not just capacity. One huge card holds everything, but if it fails, corrupts or gets lost, you lose the whole trip, which is a risk no photographer should take. Several medium cards are safer, because losing one card loses only part of the trip, and they are easier to organise by day or location. A good rule is to carry one more card than the calculation says you need, keep full cards separate from the camera, and never format a card until its contents are backed up in two places.
Backup on the road has become easier and cheaper, and it is the single best habit a travelling photographer can build. A small portable hard drive or a laptop backup each evening protects against card failure, while cloud backup over hotel wifi protects against theft and loss, though uploads can be slow for RAW files. The 3-2-1 rule is the gold standard: three copies, on two different media, with one copy off-site, which for a traveller means card plus drive plus cloud. Even a nightly phone backup of JPEG previews is better than nothing, because previews preserve memories even when originals are lost.
Video changes the calculation dramatically, and it catches many travellers by surprise. One minute of 4K video can use 300 to 400 megabytes, which means ten minutes of video needs more storage than a thousand JPEG photos. If you plan to shoot video, budget it separately: estimate your video minutes per day, multiply by your camera's bitrate, and add that to the photo total. Many travellers discover too late that their video clips consumed the card that was meant for stills, so keeping a dedicated card for video is a wise and simple precaution.
Card speed matters as much as capacity, especially for burst shooting and video. A slow card can stall a camera mid-burst, corrupt a video file, or make the camera feel unresponsive at the decisive moment. Look for cards with a V30 rating or better for 4K video, and a UHS-II rating for fast burst cameras, and buy cards from reputable brands, because counterfeit cards are common online and often report fake capacities that fail when full. Test every new card before a trip by filling it completely and verifying the files, because a card that fails in your living room is an annoyance, while a card that fails on a mountain is a disaster.
Phone photographers have their own version of this problem, because phone storage is fixed and shared with apps, music and messages. Before a trip, check how much free space your phone has, offload old photos to cloud storage, and consider whether your phone shoots in HEIC or JPEG, because the format setting alone can triple or quarter your capacity. A small portable drive that connects directly to a phone is a cheap insurance policy, and it lets you clear space each evening without a laptop, which keeps the phone ready for the next day's shooting.
The best travel photos come from being present, not from counting megabytes, but a minute of planning before departure buys freedom for the whole trip. Enter your days, your daily rate and your format into PhotoStore, pack the cards it recommends plus one spare, and then forget about storage entirely. The camera should be a tool for seeing, not a source of anxiety, and a traveller who never sees a card-full warning is a traveller who is free to look at the world instead of at a screen.
One more habit separates relaxed travellers from anxious ones: the nightly cull, a five-minute ritual of deleting obvious failures before they accumulate into storage pressure. Blurry shots, accidental pocket photos, duplicates from burst sequences and test exposures can easily make up a third of a day's shooting, and deleting them each evening frees meaningful space and makes the final selection far easier at the end of the trip. Do the cull on the camera or phone, not on the backup drive, so the backup always holds the full original set until you are home and certain. Keep the cull ruthless but quick, judging by sharpness and expression rather than sentiment, because a photo that is technically poor rarely improves with age. This small nightly discipline keeps storage comfortable, keeps the edit manageable, and keeps the photographer's eye sharp for the next day's shooting.
A further consideration is the humble memory card reader and the laptop or tablet you use for backup, because the fastest cards in the world are useless if your reader is slow or your device has no free space. Before a trip, check that your reader matches your card format, that your backup drive has at least twice the space your calculation predicts, and that your laptop's photo software can read your camera's RAW files, because discovering an incompatible format on the road is a frustrating waste of an evening. Carry a spare reader, because readers are small, cheap and easy to lose, and a trip without one means cards that cannot be emptied. Label your cards and drives with the trip name and date, because a year later, an unlabelled drive is a mystery box, while a labelled one is a treasure chest.
Frequently asked questions
How much storage do I need for a week of travel photos?
At 100 JPEG photos a day, a week needs about 5.5 gigabytes, which fits on one 32 gigabyte card with room to spare.
How big is a RAW photo compared with JPEG?
A RAW photo is about 30 megabytes versus about 8 megabytes for JPEG, so RAW needs roughly four times the storage.
Should I use one big memory card or several smaller ones?
Several medium cards are safer, because losing or corrupting one card loses only part of your trip, not all of it.
How much storage does 4K video use?
About 300 to 400 megabytes per minute, so ten minutes of 4K video needs more space than a thousand JPEG photos.
What is the 3-2-1 backup rule?
Keep three copies of your photos, on two different media, with one copy off-site, such as card plus portable drive plus cloud backup.
How do I test a new memory card before a trip?
Fill it completely with files and verify they all read back correctly, because counterfeit cards often report fake capacities.