How Much Data Do You Actually Need to Travel?

Ask ten travelers how much data they need and you'll get ten guesses. Some land with 1 GB and burn through it by the first afternoon. Others buy a huge plan for a week of maps and messaging, then come home having used 800 MB of it.

Both mistakes cost money. The fix is knowing what your apps actually use, matching that to how you travel, and buying accordingly. Prepaid data makes the stakes low: if you guess wrong, you top up. No meter running in the background, no bill waiting at home.

Here are the real numbers.

What your apps actually use

Data appetites vary wildly from app to app. A rough but honest guide:

• Maps and navigation: about 5–10 MB per hour. Active turn-by-turn navigation is far lighter than most people expect. A full day of wandering a new city with the map open might cost you 50 MB. Download the offline map before you go and it drops to almost nothing.
• WhatsApp messages: negligible. Text and the odd photo barely register. Voice calls run about 0.5 MB per minute, video calls around 5 MB per minute. A 20-minute voice call home is roughly 10 MB. The same call on video is about 100 MB. This matters because travel eSIMs are data-only — your calls happen over WhatsApp, FaceTime, or Telegram, and they're cheap in data terms as long as you keep the camera off.
• Instagram and social feeds: about 100–150 MB per hour. The scroll is the sneaky one. Autoplaying video means twenty "quick checks" a day add up faster than an hour of navigation.
• Streaming video: about 700 MB per hour in SD, 1.5–3 GB per hour in HD. This is the single biggest line item on any travel data budget. One HD movie can outweigh everything else you do all week.
• Photo and video backup: potentially gigabytes. A day of vacation photos syncing to the cloud can quietly upload more than everything above combined. Set backup to Wi-Fi only and let it run at the hotel.

Notice the pattern. The things you actually need while out and about — directions, messages, translations, pulling up a booking — are light. The things that devour data are the things that can wait for Wi-Fi.

Three traveler profiles

Match yourself to a row. Be honest about the scrolling.

Most travelers who sit down and do this math discover they're lighter than they feared. The fear of running out is usually built on home habits — where your phone streams, syncs, and updates freely all day. Abroad, with a handful of settings adjusted, the same phone runs on a fraction of that.

Do the math for your trip

Take a ten-day trip to Europe as an example. A normal user at 1–2 GB per week needs roughly 2–3 GB total. On regional European plans starting from around €1.40–1.90 per GB, that entire trip's connectivity costs less than one airport sandwich.

Even the heavy profile — call it 7 GB over ten days — stays in cheap territory. Compare that with carrier roaming day passes, which typically run $10–15 per day whether you use them or not, and the case for buying only what you'll use makes itself.

Five settings that cut your usage in half

None of these change how your trip feels. All of them shrink the bill.

1. Download offline maps before you leave. Your whole destination city, saved on Wi-Fi, free to navigate.
2. Set photo backup to Wi-Fi only. The single biggest silent drain, gone.
3. Turn on data saver in Instagram and your browser. Autoplay off, images compressed, scroll intact.
4. Download shows and playlists at the hotel. Streaming on the train becomes playback, at zero cost.
5. Restrict background app refresh and auto-updates to Wi-Fi. Apps love to sync when you're not looking.

Do these five things and the "normal" profile often drops close to "light."

Why guessing low isn't scary

Here's the part that removes the anxiety entirely: with a prepaid eSIM, running low isn't a crisis. You get a fixed number of GB, you can see what's left, and if the trip turns out heavier than planned — a rainy day of streaming, an unexpected video call marathon — you top up in a couple of taps. The price you see at checkout is the price you pay.

Contrast that with the alternative many travelers reach for: an "unlimited" plan bought out of fear. Many of those plans throttle speeds after a daily high-speed allowance, a detail buried in fair-use fine print. We've broken down how that works in our look at whether unlimited eSIM data is really unlimited — the short version is that a metered plan you understand usually beats an unlimited plan you don't.

Buying data should work like buying anything else prepaid: pick the amount, pay once, use it. Not a gamble on fine print.

Before you fly

Your pre-trip data checklist takes five minutes:

• Pick your profile — light, normal, or heavy — and be honest.
• Multiply the weekly figure by your trip length, then add a small buffer.
• Apply the five settings above.
• Buy that amount, not triple it "just in case." Top-ups exist for a reason.

Sonet's prepaid eSIM plans cover 190+ countries, activate via QR code with setup done in under 5 minutes, and run alongside your physical SIM — so your home number stays live for calls, texts, and bank codes while the eSIM handles the data. Daily, weekly, and monthly sizes mean you can match the plan to the math instead of rounding up wildly.

Know your number, then find the right plan around it. Buy what you need. Top up if you're wrong. That's the whole strategy.