The World’s Cheapest Currencies: Which Is the Lowest?

How Is the World’s Cheapest Currency Determined?

It is determined by evaluating its exchange value against more stable currencies, such as the euro or the dollar. This reflects the currency's ability to purchase goods and services on the international market.

Currency devaluation usually occurs due to a number of factors, such as poor economic management or high inflation. Conditions like these reduce confidence in the currency, causing a sharp drop in its value against stronger currencies.

Therefore, the cheapest currency is the one that requires the most units to equal a stable currency.

Iranian Rial: The World’s Cheapest Currency

The Iranian rial (IRR) is the currency of Iran, an economy that has operated under international sanctions for decades. As a result, it currently holds the lowest nominal value of any currency in the world.global currencies. 

This is largely driven by sanctions that restrict Iran’s oil exports and cut the country off from major parts of the global financial system, compounded by persistent double-digit inflation.2019 crisis and the 2020 default, coupled with a loss of confidence in the banking system.

Iran also operates several parallel exchange rates at once — a subsidized official rate for essential imports, an intermediate rate on its Electronic Trading System (ETS), and a much weaker open-market (street) rate. The gap between these rates has widened over time, and the government has periodically announced plans to unify them without yet fully doing so.exchange rate multiplied and the economy became dollarized in many prices and contracts.

Why is Iran’s currency the cheapest?

Unlike the world’s most expensive currency, the Iranian rial has the lowest nominal value of any currency in 2026 when measured against the US dollar on the open market.most expensive currency, the nominal value of the Lebanese pound is the lowest when compared to the dollar. This is the most significant reason why it is positioned as the cheapest currency in 2025.

However, it is important to note that certain factors have contributed to this, such as:

• Decades of international sanctions restricting oil exports and banking access.

• Multiple, diverging official and open-market exchange rates.

• Persistent double-digit domestic inflation.

• Limited access to the international financial system, including SWIFT.

• Heavy dependence on informal channels to trade oil and access foreign currency.

• Repeated, so-far-unsuccessful attempts to unify the exchange-rate system.

It should be noted that these factors combined have weakened the Iranian rial for decades, with the gap to its open-market rate widening further in recent years.

Which Is the Most Devalued Currency in the World in 2025?

If we talk about the currencies that have suffered the greatest percentage loss against the USD in 2025, the list is different.

Here is a list of the five most devalued currencies in the world in 2025:

1. Venezuelan bolivar (VES): -51%.

2. South Sudanese pound (SSP): depreciation of nearly 136% in just one year.

3. Argentine peso (ARS): -10-12%.

4. Turkish lira (TRY): worst performing emerging market currency.

5. Libyan dinar (LYD): -13.3%.

These currencies have experienced significant depreciation in value against the dollar during 2025. However, this depends on the period and the exchange rate used (official or parallel).

Top 10 Cheapest Currencies Worldwide

Below is a ranking of the 10 cheapest currencies in the world and the reasons behind them.

1. Iranian Rial

The Iranian rial tops the list, weighed down by international sanctions that limit trade. Political instability and persistent hyperinflation are also reasons for the significant deterioration in its value.

2. Lebanese pound

The Lebanese pound follows closely behind, weakened by a combination of factors that have affected its value against the dollar — namely the financial collapse and prolonged recession that triggered runaway inflation.

3. Vietnamese Dong

The Vietnamese dong, Vietnam's currency, is among the cheapest currencies despite its economic growth. This is due to the slow transition to a market economy and barriers to attracting foreign investment.

4. Sierra Leonean Leone

Serious economic and social challenges in Sierra Leone have weakened its currency. Dependence on mineral resources, healthcare crises, and high inflation have accelerated the leone’s devaluation.

5. Lao Kip

The Lao kip’s decline is driven by a low level of foreign investment and reliance on resource exports. This is exacerbated by persistent inflation and limited trade volumes.

6. Indonesian Rupiah

The rupiah faces pressure from Indonesia’s heavy dependence on commodity exports and shrinking foreign currency reserves, along with substantial vulnerability in external investments.

7. Uzbek Som

The Uzbek som is one of the cheapest currencies due to a transitioning economy with inadequate reforms. A weak industrial base and structural issues such as inflation and unemployment worsen the situation.

8. Guinean Franc

Various combined factors keep the franc among the world’s weakest currencies. Recurring political instability, unfavorable socioeconomic conditions, and poor management hamper Guinea’s sustainable growth.

9. Cambodian Riel

Much of Cambodia’s economy runs on US dollars, leaving the riel stuck as a weak currency. Additionally, its global competitiveness is limited by lack of economic diversification.

10. Ugandan Shilling

Its weakness stems from exporting goods of low added value, along with an agriculture-dependent economy. Inflation and price swings also affect its stability.

The Cheapest Currencies and Their Value in USD:

Exchange rates as of August 2026, compiled from xe.com and central-bank sources.

Why Do Currencies Lose Value?

Currencies lose value both from internal issues and global factors, and decisions can also impact confidence in their stability.

Key reasons behind this phenomenon:

• Inflation. When a country’s inflation exceeds that of its trade partners, its goods and services become more expensive and less competitive, thus weakening its currency.

• Instability. Political crises generate uncertainty and distrust among investors, leading to capital flight that pushes down the currency’s value.

• Trade balance deficits. If a country imports more than it exports, the demand for foreign currency grows, weakening its own currency.

• Low interest rates. These can reduce foreign investment due to lower returns.

• Speculation. Negative perceptions about a currency can spark massive sell-offs in the markets, accelerating devaluation.

Moreover, external factors can trigger sudden depreciations, such as a global crisis, commodity price shifts, or natural disasters in the country.

Conclusion

The world’s cheapest currencies share similar traits, though each case has its nuances. If you look closely, high inflation, certain economic policies, or dependence on vulnerable economic sectors are common. But there are other factors as well, such as fluctuation in commodity prices, that contribute to their depreciation.

So it’s a mix of internal and external problems.

Despite their low value in global markets, these currencies remain in use in their local economies. Everyday transactions—like writing checks or sending money transfers—persist.

Still, you can explore other methods so your money isn’t exposed to these consequences. In that context, ARQ becomes an innovative alternative for users in Mexico, Colombia, and Argentina.

With us, you can gain stability and convenience in the face of possible peso fluctuations, as you can operate with digital dollars and euros. Furthermore, you have the option to switch your balance from one currency to another directly in the app at a fair exchange rate.

FAQ

What is the cheapest currency in the world?

The currency with the lowest nominal value per unit in 2026 is the Iranian rial, trading at roughly 1,867,000 IRR per USD on the open market (its official rate is considerably stronger, reflecting Iran’s multi-tier exchange system). The Lebanese pound follows in second place, at around 89,500–90,000 LBP per USD.

What is the most expensive currency in the world?

The Kuwaiti dinar (KWD) continues to top the list of most expensive currencies in 2026. This has been the case for a long time thanks to the country's stable exchange rate regime and solid oil revenues.