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国立公園パスやアムトラック鉄道ガイド、日程別モデルコース、州売上税＆チップ計算機（$）、全米50州＋ワシントンD.C.の10,714都市データベース。

Estimate your daily and total US trip cost in US Dollars ($) and your home currency.

Calculate exact checkout totals across all 50 US states + D.C., 18–22% restaurant tipping, and live USD ($) conversion.

Compare Amtrak Acela, Northeast Regional, long-distance Superliner sleepers, and the $499 10-segment USA Rail Pass.

Compare per-park vehicle entry fees ($30–$35) across 63 US National Parks against the $80 annual Interagency Pass.

Compare pay-as-you-go fares against weekly caps and passes in NYC ($34 OMNY cap), SF, Chicago, DC, and LA.

Convert Fahrenheit (°F), miles, gallons, pounds, ounces, and feet, plus practice US diner lingo and road signs.

Search 40+ American travel idioms and display fullscreen dietary & allergy cards with US English audio.

Build a custom 3-to-21-day US itinerary by arrival airport, pace, and region, saved in your browser.

Check your suitcase against the US 22×14×9 inch carry-on limit, $35 checked bag fees, and Amtrak baggage rules.

Get a personalized light exposure, sleep-shift, and caffeine schedule across Eastern, Central, Mountain, Pacific, Alaska & Hawaii time.

Instant cheat-sheets for 18–22% restaurant tipping, hotel housekeeping, bars, rideshares, and National Park rules.

Check if your chargers, CPAP, hair dryer, or straightener work on the US 120V 60Hz electrical grid (NEMA Type A & B).

Interactive month-by-month guide to US weather, National Park windows, fall foliage, and major holidays.

Build a printable US packing checklist tailored to your season, National Park hikes, and airline baggage plan.

Answer six quick questions to find the US region and National Park corridor that matches your travel style.