Quick answer: For a typical traveller, 1 GB of mobile data lasts about 1 day, 5 GB lasts 4–7 days, 10 GB lasts 1–2 weeks and 20 GB lasts 2–4 weeks. The real number depends on what you do: 1 GB is roughly 13 hours of web browsing, 2 hours of YouTube (480p), or only 20 minutes of Netflix in HD. Use the free calculator below to size your trip, then pick a Simbye eSIM that fits.
"How long does my data last?" is the question every traveller asks right before a trip — and the honest answer is: it depends entirely on what you do online. A gigabyte that lasts a week of maps and messaging can vanish in 20 minutes of HD Netflix. This guide gives you the exact 2026 numbers for every popular app, a breakdown of how long 1, 3, 5, 10, 20 and 50 GB really last, and an interactive calculator that turns your own habits into a clear recommendation. No vague "should be enough" — real hours, real activities, real plans.
Table of contents
- Data calculator: how much do you need?
- How much data each app uses per hour (2026)
- Streaming quality: SD vs HD vs 4K
- How long does 1, 3, 5, 10, 20 & 50 GB last?
- All data volumes compared at a glance
- Which data plan suits whom
- How to check & reduce your data usage
- The smartest way to get data abroad
- FAQ
Data calculator: how much do you need?
Drag the sliders to match a typical day on your trip, set how many days you'll travel, and tap Calculate. You'll get an estimate of your daily and total data use, plus the Simbye plan that fits.
Estimates use typical 2026 consumption rates (SD video, high-quality music). Heavy HD/4K streaming uses more — see the tables below.
How much data each app uses per hour (2026)
Data use is measured in megabytes (MB) and gigabytes (GB) — 1 GB = 1,024 MB. The table below shows realistic per-hour consumption for the apps travellers use most. Notice the huge range: navigation and messaging barely register, while HD video and video calls are the real data eaters.
| Activity | Data per hour | Hours on 1 GB |
|---|---|---|
| Text messaging (WhatsApp, iMessage) | ~1–5 MB | 200–1,000 h |
| Email (no attachments) | ~1–5 MB | 200–1,000 h |
| Maps & navigation | ~5–10 MB | 100–200 h |
| Ride-hailing (Uber, Bolt) | ~5–10 MB | 100–200 h |
| AI chat (ChatGPT, text) | ~5–15 MB | 65–200 h |
| Music — Spotify/Apple Music (high) | ~70–150 MB | 7–14 h |
| Web browsing (general) | ~60–100 MB | 10–17 h |
| Facebook / X (Twitter) | ~160–360 MB | 3–6 h |
| ~720 MB | ~1.4 h | |
| TikTok / Reels | ~840 MB | ~1.2 h |
| YouTube (480p) | ~560 MB | ~1.8 h |
| Netflix (HD 1080p) | ~3 GB | ~0.3 h (20 min) |
| Video calls (Zoom/Meet HD) | ~1.5–2.5 GB | ~0.4–0.7 h |
| Cloud gaming (GeForce Now, xCloud) | ~4–10 GB | ~6–15 min |
Video calls over WhatsApp or FaceTime are lighter (~135–400 MB/hour) than full-HD Zoom or Google Meet meetings.
Streaming quality: SD vs HD vs 4K
Streaming is where data disappears fastest, and the resolution you choose changes everything. Dropping Netflix or YouTube from HD to SD can cut data use by 4–10× — the single most effective way to make a plan last longer.
| Quality | YouTube / hour | Netflix / hour | Hours on 10 GB |
|---|---|---|---|
| Low (360p) | ~315 MB | ~300 MB | ~33–34 h |
| SD (480p) | ~560 MB | ~700 MB | ~14–18 h |
| HD (720–1080p) | ~1.5–3 GB | ~3 GB | ~3–7 h |
| 4K UHD | ~16 GB | ~7 GB | under 1.5 h |
Travel tip: on a phone screen, 480p looks perfectly fine. Lock your streaming apps to "Standard" or "Data Saver" and a 10 GB plan suddenly lasts a whole trip instead of an evening.
How long does 1, 3, 5, 10, 20 & 50 GB last?
Below, each data volume is broken down by activity, with a real-world summary for light, average and heavy users. The single-activity hours assume one continuous activity; in real life you mix them, so use the calculator above for your personal number.
How long does 1 GB last?
| Activity | Lasts about |
|---|---|
| Maps & navigation | ~128 hours |
| Music (high quality) | ~14 hours |
| Web browsing | ~13 hours |
| YouTube (480p) | ~1.8 hours |
| Social media (mixed) | ~1.7 hours |
| Netflix (HD) | ~20 minutes |
Real-world: ~2–3 days for a light user, ~1 day for an average user, a few hours for a heavy streamer. Good as a backup or for a short city break.
How long does 3 GB last?
Triple the hours above: ~38 h browsing, ~43 h music, ~5.5 h YouTube (480p), ~1 hour of HD Netflix. Real-world: ~1 week light, ~3 days average, ~1.5 days heavy. A solid choice for a weekend away with light streaming.
How long does 5 GB last?
| Activity | Lasts about |
|---|---|
| Web browsing | ~64 hours |
| Music (high quality) | ~71 hours |
| YouTube (480p) | ~9 hours |
| Social media (mixed) | ~8.5 hours |
| Video calls (HD) | ~3.5 hours |
| Netflix (HD) | ~1.7 hours |
Real-world: ~10–14 days light, ~4–5 days average, ~2 days heavy. The sweet spot for most one-week trips without heavy video.
How long does 10 GB last?
| Activity | Lasts about |
|---|---|
| Web browsing | ~128 hours |
| Music (high quality) | ~142 hours |
| YouTube (480p) | ~18 hours |
| Social media (mixed) | ~17 hours |
| Video calls (HD) | ~7 hours |
| Netflix (HD) | ~3.4 hours |
Real-world: ~3 weeks light, ~1 week average, ~3–4 days heavy. The most popular all-rounder for a 1–2 week trip with normal social and music use.
How long does 20 GB last?
Double the 10 GB figures: ~256 h browsing, ~37 h YouTube (480p), ~14 h of HD video calls, ~7 h of HD Netflix. Real-world: ~6 weeks light, ~2 weeks average, ~1 week heavy. Ideal if you stream daily or work remotely on the road.
How long does 50 GB last?
Five times the 10 GB figures: ~91 h YouTube (480p), ~17 h of HD Netflix, ~34 h of HD video calls. Real-world: over a month for an average user, ~2–3 weeks for a heavy streamer. A great fit for long stays, digital nomads and families sharing one hotspot.
What about Unlimited?
An Unlimited eSIM removes the maths entirely — you stream, call and navigate without watching a counter. Most "unlimited" plans run at full 5G speed up to a high fair-use threshold and then continue at a reduced speed, so they're perfect for heavy users who don't want to track usage. The Simbye USA Unlimited eSIM even adds a real US phone number and unlimited calls on AT&T 5G.
All data volumes compared at a glance
| Data | YouTube 480p | Netflix HD | Social (mixed) | Average traveller |
|---|---|---|---|---|
| 1 GB | ~1.8 h | ~20 min | ~1.7 h | ~1 day |
| 3 GB | ~5.5 h | ~1 h | ~5 h | ~3 days |
| 5 GB | ~9 h | ~1.7 h | ~8.5 h | ~4–5 days |
| 10 GB | ~18 h | ~3.4 h | ~17 h | ~1 week |
| 20 GB | ~37 h | ~7 h | ~34 h | ~2 weeks |
| 50 GB | ~91 h | ~17 h | ~85 h | ~1 month+ |
Which data plan suits whom
| You are… | Best size | Why |
|---|---|---|
| Light user / short city break | 1–3 GB | Maps, messaging, occasional browsing |
| Average one-week traveller | 5–10 GB | Social, music, light video, daily navigation |
| Two-week trip / heavy social | 10–20 GB | Lots of Reels/TikTok, photos, video calls home |
| Remote worker / digital nomad | 20–50 GB or Unlimited | Video meetings, hotspot, cloud sync all day |
| Streamer / family hotspot | Unlimited | HD video and calls without rationing data |
Simbye offers all of these sizes for 200+ destinations. Popular picks: the Europe eSIM (20–100 GB with calls), the USA Unlimited eSIM (unlimited data + a real US number), and country plans for Turkey, Japan and Thailand.
How to check & reduce your data usage
Check usage on iPhone: Settings → Cellular/Mobile Data → scroll to see usage per app. On a Simbye eSIM you also see live remaining data in the Simbye app.
Check usage on Android: Settings → Network & internet → SIMs/Data usage → App data usage.
Seven ways to make your data last longer:
- Set Netflix/YouTube to "Standard" or "Data Saver" — the biggest single saving.
- Download maps, playlists and shows over Wi-Fi before you head out.
- Turn off video autoplay in Instagram, TikTok, Facebook and X.
- Enable your phone's built-in Data Saver / Low Data Mode.
- Disable background app refresh and auto-updates on cellular.
- Back up photos to the cloud only on Wi-Fi, not mobile data.
- Use Wi-Fi calling and messaging apps instead of streaming when you can.
The smartest way to get data abroad
Once you know how much data you need, the cheapest and easiest way to get it is an eSIM — a digital SIM you install in minutes, with no plastic card and no roaming bill shock. With Simbye you choose your destination and data size, scan a QR code, and you're online the moment you land. Plans start small for a weekend and scale all the way to Unlimited, and many include calls and a real phone number on top of data.
Frequently asked questions
How long does 1 GB of data last?
For an average user, about one day. That's roughly 13 hours of web browsing, 1.8 hours of YouTube at 480p, or only 20 minutes of Netflix in HD.
Is 10 GB of data a lot?
It's enough for most 1–2 week trips with normal use — about a week for an average traveller, or roughly 18 hours of 480p YouTube. Heavy HD streamers will go through it faster.
How much data do I need for a week abroad?
Light users are fine with 3–5 GB; average users should pick 5–10 GB; if you stream video or work online, choose 20 GB or Unlimited.
Can you watch Netflix on 10 GB?
Yes — about 3–4 hours in HD, or 14+ hours in SD. Switching Netflix to Standard quality multiplies how much you can watch.
What uses the most mobile data?
HD and 4K video streaming and HD video calls. 4K YouTube can burn 16 GB in a single hour, while maps and messaging use only a few MB.
Does using maps use a lot of data?
No. Navigation uses only about 5–10 MB per hour, so 1 GB covers over 100 hours of directions. Download offline maps to use almost none.
What happens when my eSIM data runs out?
Your connection simply stops until you top up or buy a new plan. With Simbye you can top up in the app in seconds, or choose an Unlimited plan so it never runs out.
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