Travel Currency Budget Calculator

A travel currency budget planner helps you convert your daily spending budget into local currency, track purchasing power across multiple currencies, and ensure you’re exchanging money at the right rate without overpaying on fees.

Formulas: Local Currency Amount = Home Currency Amount × Exchange Rate Home Currency Amount = Local Currency Amount ÷ Exchange Rate Total Daily Budget in Local Currency = Daily Spend Limit × Exchange Rate Effective Exchange Rate (after fees) = Nominal Rate × (1 − Fee %) ATM Withdrawal Comparison: Net Amount = Withdrawal − ATM Fee − Foreign Transaction %

Where exchange rates come from: The interbank rate (also called the “mid-market rate”) is the real exchange rate used between banks. All consumer-facing options charge a markup above this rate.

Fee comparison by exchange method:

Enter whichever number matches your method in the markup box and the calculator will tell you what it costs on this specific trip.

Worked example: 10-day trip to Japan. Daily budget: $150 USD. Mid-market rate: 1 USD = 148 JPY.

Daily budget in yen = $150 × 148 = ¥22,200/day Total trip budget = ¥22,200 × 10 = ¥222,000

Exchanging at an airport kiosk charging 5% above mid-market gives you an effective rate of 148 × 0.95 = 140.6 JPY per dollar. To end up holding ¥222,000 you now have to hand over ¥222,000 ÷ 140.6 = $1,578.95, not $1,500. That is $78.95 of pure markup on a ten-day trip, roughly half a day of your own budget handed to the kiosk.

Do the same through Wise at 0.6% and the effective rate is 147.11, so the same ¥222,000 costs $1,509.05. The markup is $9.05.

The gap between those two choices is $69.90, and it took no effort to capture. Around the 5% mark each extra percentage point costs about $16 on this trip, which is a handy way to read the table above: multiply the markup difference by that figure and you have your answer without recalculating anything.

Pro tips:

• Always pay in the local currency when a card terminal offers to charge you in dollars. That offer is dynamic currency conversion, and the rate behind it is set by the merchant’s processor rather than your card network.
• Tell your bank and card issuer where you are going. A fraud block on day one of a trip is a genuinely bad afternoon.
• Carry some local cash even in card-heavy countries. Taxis, market stalls, small cafes, and public toilets in much of Europe still want coins.