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How much data do I need for a trip to the USA?
Quick answers for a trip to the USA, using the same activity rates as our data calculator — then the local gotchas that change real-world use, and the cheapest plans we listed in our USA guide.
Quick answer: plan size by trip length
Pick the column that matches how you use your phone. Light is maps and messaging; Typical adds social and a little video; Heavy adds streaming and some hotspot. Figures are the plan size we’d buy after the 15% buffer — not a guarantee of your phone’s meter.
| Trip length | Light use | Typical use | Heavy use |
|---|---|---|---|
| 3 days | 1 GB549 MB est. | 3 GB2.55 GB est. | 10 GB8.62 GB est. |
| 7 days | 3 GB1.25 GB est. | 10 GB5.95 GB est. | Unlimited20.12 GB est. |
| 10 days | 3 GB1.79 GB est. | 10 GB8.50 GB est. | Unlimited28.74 GB est. |
| 14 days | 3 GB2.50 GB est. | 20 GB11.89 GB est. | Unlimited40.23 GB est. |
| 30 days | 10 GB5.36 GB est. | Unlimited25.49 GB est. | Unlimited86.22 GB est. |
Estimates use the same formula as our eSIM data calculator: activity rates × hours/day × days, plus a 15% buffer, rounded up to 1 / 3 / 5 / 10 / 20 GB or unlimited. No hotel Wi‑Fi assumed. Checked methodology 4 November 2026.
Open calculator pre‑filled for USA Full USA eSIM guide Compare with roaming cost
USA plan snapshot
Checked 4 November 2026- Cheapest fixed plan
- $3.72Yesim, 1 GB / 30 days (Nomad: 3 GB / 30 days for $4)
- 7 days unlimited
- $19Nomad
- 10 GB / 30 days
- $10.40Nomad (Ubigi: $14)
From our USA guide, official pages checked 4 November 2026. Always confirm at checkout.
What makes data use in the USA different
- The network behind the plan matters. In Manhattan the differences are small; on long drives, in national parks and in rural areas, AT&T, T‑Mobile and Verizon footprints diverge. Check which network your plan names against your route.
- Road trips inflate maps and music. Live navigation plus hours of streaming audio on interstate Wi‑Fi‑free stretches is a common reason USA estimates run higher than city breaks.
- Fair‑use rules on “unlimited” vary — read the plan page for daily high‑speed caps and hotspot limits.
- Most plans are data‑only (Saily sells an optional US number). Keep your home SIM for SMS codes.
Networks named in our guide: AT&T, T-Mobile and Verizon — footprint differs outside big cities. Airalo names T-Mobile; Nomad names Verizon / AT&T; Ubigi names T-Mobile (also Puerto Rico and US Virgin Islands).
Next steps
Tune the estimate
Adjust hours, Wi‑Fi and devices on the data calculator — your URL becomes a share link.
Pick a plan in the USA guide
Fixed vs unlimited, fair use, hotspot rules and affiliate links to Airalo, Saily, Yesim and others.
Weigh roaming
If your home carrier sells a daily pass, run the numbers on our eSIM vs roaming comparator.
Frequently asked questions
How much data for 10 days in the USA?
City breaks often fit in 5–10 GB. Cross‑country drives with maps and music all day lean toward 10 GB or unlimited. See our USA eSIM guide.
Which network should my USA eSIM use?
Match the named network to where you’re going. Urban coasts are usually fine on any of the big three; parks and rural West/Midwest need a closer look at coverage maps.
Is a carrier day pass cheaper than an eSIM in the US?
If your home carrier is already US‑based, you may not need either. Incoming visitors usually save with an eSIM versus a foreign carrier’s roaming pass — try our eSIM vs roaming comparator.
How does Signal Atlas calculate these numbers?
We use published planning rates (for example Netflix’s SD ≈ 0.7 GB/hr and Spotify Normal ≈ 72 MB/hr), multiply by hours per day and trip length, add a 15% buffer, and round up to a common plan size. Full methodology is on the calculator page.
Can I share this estimate?
Open the pre‑filled calculator for USA — the URL stores your sliders so you can send it to a travel buddy.
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Last checked 4 November 2026
All prices and plan facts on this page were read from these official pages on 4 November 2026. We have not purchased or tested these plans ourselves; we summarize what the providers publish, in our own words. Read our method.
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