Indonesia Number Format
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Format Rules
Indonesia formatting implementation notes
For Indonesia, format numbers with the explicit locale id-ID; the reference value 1234567.89 renders as 1.234.567,89.
Indonesia's reference format uses "," as the decimal mark and period (".") for grouping. The integer uses repeating groups of three digits. Pass "id-ID" directly to Intl.NumberFormat instead of replacing punctuation in a preformatted string.
IDR is shown with Rp immediately before the amount; the same reference value renders as Rp1.234.567,89. The percent sign appears immediately after the amount. Use the ISO currency code for storage and interchange because a visible symbol can be shared by unrelated currencies.
Western 0–9 digits are the page's reference digit system, and the negative pattern is -n. Treat id-ID as the reference locale for this page, but still respect the user's explicitly selected language and numbering-system preferences. Validate output with formatToParts() when spacing, signs, or bidirectional literals affect the interface.
- Locale: id-ID
- Decimal and grouping: 1.234.567,89
- Currency: IDR → Rp1.234.567,89
- Digits: Western 0–9 digits
Reviewed 19 July 2026. Sources: Unicode locale number formats · Intl.NumberFormat reference
What's different here
- Decimal mark is a comma (,) (en-US uses a period (.)).
- Thousands are grouped with a period (.) (en-US uses a comma (,)).
- No other Asia page in this directory shares this exact pattern; 13 pages in other regions do.
- Nearby differences: Vietnam (vi-VN) places the currency symbol after the amount with a space; Cambodia (km-KH) places the currency symbol after the amount with a space.
- Currency: IDR has ISO minor unit 2.
- Postal address order: name → building → street + street number → district → city + postcode → region → country. See address formats.
Code Examples
// Basic number
new Intl.NumberFormat('id-ID').format(1234567.89)
// → "1.234.567,89"
// Currency
new Intl.NumberFormat('id-ID', {
style: 'currency',
currency: 'IDR'
}).format(1234567.89)
// → "Rp1.234.567,89"
// Percentage
new Intl.NumberFormat('id-ID', {
style: 'percent',
minimumFractionDigits: 1
}).format(0.125)
// Compact notation
new Intl.NumberFormat('id-ID', {
notation: 'compact'
}).format(1234567)Negative Number Formats
new Intl.NumberFormat('id-ID').format(-1234567.89)new Intl.NumberFormat('id-ID', { style: 'currency', currency: 'IDR', currencySign: 'accounting' }).format(-1234567.89)
Continue your localization implementation
Connect this reference to the format, validation, and testing guidance used elsewhere on the site.
Formatting implementation
Numbers, currencies, dates, time zones, numbering systems, and production tests.
Failure patterns
Hardcoded copy, broken layouts, missing context, bidi, and cultural adaptation.
Standards reference
ISO country, currency, and language codes; BCP 47; E.164; and UPU S42.
Validation coverage
Provider evidence, country test cases, geocoding, deliverability, and phone checks.
Locale-aware numbers
Separators, grouping, currency precision, and Intl.NumberFormat patterns.
Localization testing
Pseudolocalization, test matrices, native review, and regional release gates.
Address and phone standards
UPU S42, E.164, adaptive forms, storage, parsing, and validation.
I18n architecture
Messages, Unicode, RTL, locale services, fallbacks, and delivery workflow.
Currency reference
ISO 4217 codes, symbols, minor units, and implementation examples.
Address formats
Country templates, field order, and accessible international forms.
Phone formats
E.164 storage, regional display, parsing, and validation.
Compare locales
Inspect the same numeric value across several country formats.
Interactive tools
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