How much data do I need for Vietnam?

For a week in Vietnam, about 8GB for normal phone use, 4GB if you are light on your phone and 17GB if you are heavy. Tethering a laptop adds roughly 2.5GB per day on top.

Is 5GB enough for a week in Vietnam?

Not for normal use. A week of normal phone use in Vietnam works out at about 8GB. 5GB is enough only if you are light on your phone and on wifi most evenings.

🇻🇳 How much data do you need for Vietnam?

For a week, about 8GB if you use your phone normally, 4GB if you're light on it, 17GB if you're heavy.

Those numbers are computed, not guessed. They come from per-app consumption rates, multiplied by a normal day's use, plus background sync, plus a visible 20% buffer. Every figure below shows its working, and unlike most answers to this question, we don't get paid more when you buy more.

What you need, and what it costs in Vietnam

Trip length	Light 0.6GB/day	Normal 1.2GB/day	Heavy 2.4GB/day
3 nights	1.8GB $10.90	3.6GB $10.90	7.2GB $10.90
5 nights	3.0GB $10.90	6.0GB $10.90	12.0GB $21.80
7 nights	4.2GB $10.90	8.4GB $10.90	16.8GB $21.80
10 nights	6.0GB $21.80	12.0GB $21.80	24.0GB $32.70
14 nights	8.4GB $21.80	16.8GB $21.80	33.6GB $43.60
21 nights	12.6GB $32.70	25.2GB $32.70	50.4GB $65.40

Prices are the cheapest verified way to cover that much data for that long in Vietnam, including buying more than one plan where a single one doesn't stretch. Checked 3 Aug 2026.

Which profile are you?

Light, 0.6GB/day. Maps, messaging, a bit of scrolling. Hotel wifi most evenings.
Normal, 1.2GB/day. Social, maps, music, the usual. The majority of travellers.
Heavy, 2.4GB/day. Always on it. Video, calls, big feeds, uploads as you go.

The single biggest thing that moves you up a row isn't social media, it's tethering a laptop, which adds roughly 2.5GB a day on its own. Automatic photo and video backup is the other one people forget, and it can quietly outweigh everything else combined. Both are worth checking before you leave.

Why most answers to this question are too high

Search this question and nearly every result is written by a company selling data. On one results page for a week in Japan we found one seller recommending 20GB while a worked example elsewhere totalled around 5GB for the same trip, a fourfold spread, biased in the direction that sells more gigabytes.

Buying too much isn't free: unused data expires with the plan. The numbers above are what the arithmetic actually gives, with the buffer shown separately so you can see exactly how much slack is in them.

🇻🇳 How much data do you need for Vietnam?

What you need, and what it costs in Vietnam

Which profile are you?

Why most answers to this question are too high

Other destinations