What This Calculator Does
This tool converts an amount in Vietnamese Dong (VND) into US Dollars (USD) using Asia Commercial Bank's (ACB) USD sell rate — the rate at which the bank sells US Dollars to you. Because Vietnam's currency rules are jurisdiction-specific, this calculator is intended for users dealing with ACB in Vietnam. Always confirm the current posted rate with ACB before any transaction, as exchange rates change throughout the day.
How to Use It
Enter the amount of VND you want to convert, then enter ACB's current USD sell rate (the number of VND required to buy 1 USD — for example 25,450). The calculator divides your VND amount by the sell rate to estimate how many US Dollars you will receive.
The Formula Explained
The math is a simple division: $$\text{USD} = \frac{\text{VND amount}}{\text{sell rate}}$$ The sell rate is quoted as VND per single US Dollar. A higher sell rate means each dollar costs more dong, so you receive fewer dollars for the same VND amount.
Worked Example
Suppose you have 10,000,000 VND and ACB's USD sell rate is 25,450 VND per USD. Then $$\text{USD} = \frac{10{,}000{,}000}{25{,}450} \approx 392.93 \text{ USD}$$ So you would receive roughly $392.93.
Definitions & Glossary
- Sell rate
- The price at which the bank sells the foreign currency (USD) to you. It is the rate used in this calculator: you hand over VND and receive USD, so \( \text{USD} = \text{VND} \div \text{Sell Rate} \). The sell rate is always higher (more VND per USD) than the buy rate.
- Buy rate
- The price at which the bank buys foreign currency from you — i.e. the rate applied when you bring USD to convert into VND. It is lower than the sell rate, which is how the bank earns its margin.
- Spread
- The gap between the buy rate and the sell rate. A wider spread means a worse deal for the customer. For example, if ACB buys USD at 25,000 and sells at 25,400, the spread is 400 VND per USD.
- Cash rate vs transfer rate
- Banks often quote two sell/buy rates. The transfer (telegraphic) rate applies to electronic transfers and account credits; the cash rate applies to physical banknotes and is usually slightly less favorable because handling notes carries extra cost and risk. Check which rate matches your transaction.
- VND
- The Vietnamese Dong, the official currency of Vietnam (ISO code VND, symbol ₫). It has a relatively large numeric value per USD, so amounts are typically in the thousands or millions.
- USD
- The United States Dollar (ISO code USD, symbol $), the world's primary reserve and reference currency, against which the VND is most commonly quoted.
- Headline / posted rate
- The exchange rate displayed publicly on the bank's board, website, or app for a given currency. It is the official quoted rate before any additional fees, commissions, or branch-specific adjustments, and is the figure you would enter as the sell rate in this calculator.
FAQ
What is the sell rate? It is the price at which the bank sells US Dollars to customers. When you buy USD with your VND, the bank's sell rate applies.
Why is my result an estimate? Banks may add fees, round amounts, or apply different rates for cash versus transfer. This tool reflects the headline division only.
Can I use any bank's rate? Yes — although labeled for ACB, the calculation works with any institution's USD sell rate quoted as VND per 1 USD.
