USD — United States Dollar
fiatDeveloper Note
World reserve currency. Used in many dollarized economies.
Verified 2026-07-19. Primary source
How to implement USD safely
US Dollar uses ISO 4217 alpha code USD and numeric code 840.
USD appears in the current ISO 4217 list published 2026-01-01. USD has ISO minor unit 2, so one major unit divides into 100 minor units. Configure Intl.NumberFormat with currency: "USD"; do not hardcode the symbol or assume every currency uses two decimals.
$ is the reference symbol in this dataset. Store USD alongside the amount so exports, payments, and accounting data remain unambiguous. Format for display only after choosing the user's locale, because symbol placement and separators belong to the locale rather than the currency record.
This site's coverage associates USD with 10 countries or territories (US, EC, SV, PA, PR, GU, VI, TC, BQ, TL). Region and language still need separate locale selection; the currency code alone does not choose punctuation or digit shapes. The record was checked against the SIX ISO 4217 source on 2026-07-19; recheck status-sensitive records when the Maintenance Agency publishes a new list.
- Status: active
- Numeric code: 840
- ISO minor unit: 2
- Verified: 2026-07-19
Reviewed 19 July 2026. Sources: SIX ISO 4217 current list
Formatting Examples
| Value | en-US |
|---|---|
| 1 | $1.00 |
| 9.99 | $9.99 |
| 100 | $100.00 |
| 1234.56 | $1,234.56 |
| 1000000 | $1,000,000.00 |
Intl.NumberFormat
// Basic USD formatting
new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
}).format(1234.56);
// → "$1,234.56"
// Minimum/maximum fraction digits
new Intl.NumberFormat('en-US', {
style: 'currency',
currency: 'USD',
minimumFractionDigits: 2,
maximumFractionDigits: 2,
}).format(99);
// Example display precision: 2 decimal places
// ISO 4217 minor unit: 2
// Integer minor-unit storage
// USD amount = value × 100Continue your localization implementation
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Failure patterns
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Standards reference
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Locale-aware numbers
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