Currency millionaire: how few dollars it actually takes in the world's weakest currencies

A "millionaire" sounds impressive until the currency is factored in. In several of the world's weakest currencies, seven figures cost less than a modest hotel bill — and as of February 2017, one of them cost barely thirty dollars.

The test is simple: take a currency's exchange rate against the US dollar, then work out how many dollars buy exactly 1,000,000 units of it. For the strongest currencies, that number runs into the thousands. For the weakest, it can be less than the price of a single checked bag.

The million-unit test

Using XE.com's mid-February 2017 rates, converting 1,000,000 units of a currency into US dollars gives a rough measure of how "cheap" that currency was at the time. It says nothing about purchasing power inside the country — a rial buys rial-priced goods, not dollar-priced ones — but it is a genuine snapshot of relative currency value. Every figure below has also been checked against independent 2017 annual-average data from FRED and X-Rates, to confirm each one sits within the real range for the period rather than being an outlier or a stale quote.

The cheapest currencies to become a "millionaire" in

By February 2017, the Iranian rial was comfortably the weakest widely-quoted currency against the dollar. At a rate of roughly 32,420 IRR to the dollar, it took only about US$31 to hold 1,000,000 rials. The São Tomé and Príncipe dobra — pegged to the euro at a fixed rate since 2010 — worked out to around 23,000 old dobra to the dollar in the same month, needing about US$43 for a million units. The Vietnamese dong, trading close to 22,700 to the dollar, needed a fraction more: about US$44. The Indonesian rupiah, at roughly 13,341 IDR to the dollar, needed about US$75.

Further up the scale, a handful of other currencies still made seven figures reachable without much outlay. The Colombian peso needed about US$346 for a million units, the South Korean won about US$869, and the Chilean peso — the strongest of this particular group — about US$1,553. All seven were checked against XE.com's February 2017 data and cross-referenced against independent 2017 annual averages:

• Iranian rial — about US$31
• São Tomé & Príncipe dobra — about US$43
• Vietnamese dong — about US$44
• Indonesian rupiah — about US$75
• Colombian peso — about US$346
• South Korean won — about US$869
• Chilean peso — about US$1,553

Thirty-one dollars bought a rial millionaire in February 2017 — less than the cost of a single checked bag on most international flights.

Why these currencies were so weak

Each currency arrived at the bottom of the list for a different reason. The Iranian rial had already lost half its value in a single move in July 2013, when subsidised exchange-rate support was cut; by early 2017 Iran's government was openly discussing dropping four zeros and renaming the currency the toman, a change that still had not gone through parliament at the time. Indonesia's rupiah has traded in the thousands-per-dollar range since the 1997–98 Asian financial crisis and has never been redenominated. Vietnam's dong is managed within a tight band by the State Bank of Vietnam and has depreciated gradually rather than suddenly. The São Tomé and Príncipe dobra is not really floating at all — it has been pegged to the euro at a fixed 24,500-to-1 rate since 2010, so its dollar value moves only with the euro's.

Getting the strong end of the table right

The other end of the scale is worth a correction. Currency-strength rankings from this period typically named the Kuwaiti dinar as the world's strongest unit, at around 0.31 dinar to the dollar — meaning a dinar millionaire needed more than US$3 million. Some rankings circulating at the time also listed the Latvian lat among the strongest currencies still trading in 2017. That was already wrong: Latvia had retired the lat and adopted the euro on 1 January 2014, over three years earlier, so any lat quote in a 2017 table was stale data rather than a live exchange rate. Sterling, meanwhile, was trading close to US$1.24 in February 2017 — still well below its pre-referendum levels, after the pound's sharp fall following the June 2016 Brexit vote.

A million units is not a fortune

None of this makes anyone rich. Prices inside Iran, Indonesia, Vietnam or São Tomé are set in the same weak currency, so a million rials or dong disappears into everyday costs just as fast as a much smaller sum would elsewhere. The "millionaire" framing only works once the units are converted back into a stronger currency — it is a quirk of exchange rates, not a measure of wealth.

Since 2017: how much further some of these currencies have fallen

Currency values are not static, and the gap has widened dramatically for at least one of these. Renewed sanctions pushed Iran's free-market rate far beyond its 2017 level: by mid-2026, open-market trackers were pricing the dollar at somewhere around 1.8 million rials, more than fifty times the February 2017 rate. On paper, that means a rial "millionaire" now costs well under a dollar — a figure that says more about the rial's collapse than about affordability. The Indonesian rupiah and Vietnamese dong have weakened too, but far more gently — roughly 35% and 15% respectively by 2026 — while the São Tomé dobra was redenominated at 1,000-to-1 in January 2018, so the old "million dobra" comparison no longer applies to the currency in its current form; its euro peg has kept it broadly stable in relative terms since.

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