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Published 55 days ago Dart 3 compatible
SDKFlutter
PlatformAndroidiOSLinuxmacOSwebWindows
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Number-to-words in 69 languages for Dart. Supports int, double, BigInt, Decimal, and numeric strings. Includes currency, year formatting, and locale-specific options.

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Num2Text 0.0.4 #

pub package License: MIT

Dart library for converting numbers (integers, doubles, BigInt, Decimal, Numeric String) into their word representations (cardinal form) across a wide range of languages.

Currently supports up to 69 languages!

Features #

  • Multi-Language Support: Convert numbers to words in 69 languages (see list below).
  • Flexible Input: Handles int, double, BigInt, String (if parsable), and Decimal types.
  • Large Numbers: Handles large integer parts up to 24 digits (up to sextillions in the English short scale). Support may vary slightly by language implementation.
  • Rich Formatting Options:
    • Currency formatting with language-specific unit names and plurals ([CurrencyInfo]).
    • Year formatting (e.g., "nineteen eighty-four", "2024 AD/BC").
    • Decimal handling (e.g., "one point five", "dix virgule cinq").
    • Negative number prefixes.
    • Language-specific grammatical features (gender, case, specific connectors like 'and'/'le').
  • Error Handling: Optional fallback for invalid inputs.
  • Well-Tested: Each language has dedicated tests (see Testing section).

Installation #

Add this to your pubspec.yaml dependencies:

dependencies:
  num2text: ^0.0.3 # Use the latest version
  decimal: ^2.3.3 # Optional dependency

Then run dart pub get or flutter pub get.

Basic Usage #

Import the library:

import 'package:num2text/num2text.dart';

Create an instance and convert:

// 1. Create an instance (defaults to English)
final num2text = Num2Text(); // Or Num2Text(initialLang: Lang.EN)

// 2. Basic conversion (English)
print(num2text.convert(123));           // Output: one hundred twenty-three
print(num2text.convert(1045.67));        // Output: one thousand forty-five point six seven
print(num2text(1000000));               // Callable instance: one million

// 3. Change language
num2text.setLang(Lang.VI); // Switch to Vietnamese
print(num2text.convert(987));           // Output: chín trăm tám mươi bảy

num2text.setLang(Lang.ES); // Switch to Spanish
print(num2text.convert(25));            // Output: veinticinco

Using Options #

Customize output with language-specific options:

// English with British 'and' and GBP currency
num2text.setLang(Lang.EN);
print(num2text.convert(123, options: EnOptions(includeAnd: true)));
// Output: one hundred and twenty-three

print(num2text.convert(135.75, options: EnOptions(
  currency: true,
  currencyInfo: CurrencyInfo.gbp, // Use British Pound info
  includeAnd: true,
)));
// Output: one hundred and thirty-five pounds and seventy-five pence

// Vietnamese with 'lẻ' and year format
num2text.setLang(Lang.VI);
print(num2text.convert(105, options: ViOptions(useLe: true)));
// Output: một trăm lẻ năm
print(num2text(2024, options: ViOptions(format: Format.year)));
// Output: hai nghìn không trăm hai mươi tư

// Spanish with Euro currency
num2text.setLang(Lang.ES);
print(num2text(1.50, options: EsOptions(
  currency: true,
  currencyInfo: CurrencyInfo.eurEs, // Use Euro (Spanish) info
)));
// Output: un euro con cincuenta céntimos

// Polish with Złoty currency (demonstrates complex plurals)
num2text.setLang(Lang.PL);
print(num2text(123.45, options: PlOptions(currency: true))); // Uses PLN by default
// Output: sto dwadzieścia trzy złote i czterdzieści pięć groszy
print(num2text(5, options: PlOptions(currency: true)));
// Output: pięć złotych

Supported Languages #

The library currently supports the following 69 languages. Each language has specific options available (e.g., EnOptions, ViOptions) and is tested individually. For complete usage examples of a specific language, including all options, please check the corresponding test file listed in the table.

Language Enum Value (Lang.XX) Test File Location
Afrikaans Lang.AF test/lang/lang_af_test.dart
Amharic Lang.AM test/lang/lang_am_test.dart
Arabic Lang.AR test/lang/lang_ar_test.dart
Azerbaijani Lang.AZ test/lang/lang_az_test.dart
Belarusian Lang.BE test/lang/lang_be_test.dart
Bulgarian Lang.BG test/lang/lang_bg_test.dart
Bengali Lang.BN test/lang/lang_bn_test.dart
Bosnian Lang.BS test/lang/lang_bs_test.dart
Czech Lang.CS test/lang/lang_cs_test.dart
Danish Lang.DA test/lang/lang_da_test.dart
German Lang.DE test/lang/lang_de_test.dart
Greek Lang.EL test/lang/lang_el_test.dart
English Lang.EN test/lang/lang_en_test.dart
Spanish Lang.ES test/lang/lang_es_test.dart
Persian (Farsi) Lang.FA test/lang/lang_fa_test.dart
Finnish Lang.FI test/lang/lang_fi_test.dart
Filipino Lang.FIL test/lang/lang_fil_test.dart
French Lang.FR test/lang/lang_fr_test.dart
Hausa Lang.HA test/lang/lang_ha_test.dart
Hebrew Lang.HE test/lang/lang_he_test.dart
Hindi Lang.HI test/lang/lang_hi_test.dart
Croatian Lang.HR test/lang/lang_hr_test.dart
Hungarian Lang.HU test/lang/lang_hu_test.dart
Armenian Lang.HY test/lang/lang_hy_test.dart
Indonesian Lang.ID test/lang/lang_id_test.dart
Igbo Lang.IG test/lang/lang_ig_test.dart
Icelandic Lang.IS test/lang/lang_is_test.dart
Italian Lang.IT test/lang/lang_it_test.dart
Japanese Lang.JA test/lang/lang_ja_test.dart
Georgian Lang.KA test/lang/lang_ka_test.dart
Kazakh Lang.KK test/lang/lang_kk_test.dart
Khmer Lang.KM test/lang/lang_km_test.dart
Korean Lang.KO test/lang/lang_ko_test.dart
Kyrgyz Lang.KY test/lang/lang_ky_test.dart
Lao Lang.LO test/lang/lang_lo_test.dart
Lithuanian Lang.LT test/lang/lang_lt_test.dart
Latvian Lang.LV test/lang/lang_lv_test.dart
Macedonian Lang.MK test/lang/lang_mk_test.dart
Mongolian Lang.MN test/lang/lang_mn_test.dart
Malay Lang.MS test/lang/lang_ms_test.dart
Maltese Lang.MT test/lang/lang_mt_test.dart
Burmese Lang.MY test/lang/lang_my_test.dart
Nepali Lang.NE test/lang/lang_ne_test.dart
Dutch Lang.NL test/lang/lang_nl_test.dart
Norwegian Lang.NO test/lang/lang_no_test.dart
Polish Lang.PL test/lang/lang_pl_test.dart
Portuguese Lang.PT test/lang/lang_pt_test.dart
Romanian Lang.RO test/lang/lang_ro_test.dart
Russian Lang.RU test/lang/lang_ru_test.dart
Sinhala Lang.SI test/lang/lang_si_test.dart
Slovak Lang.SK test/lang/lang_sk_test.dart
Slovenian Lang.SL test/lang/lang_sl_test.dart
Albanian Lang.SQ test/lang/lang_sq_test.dart
Serbian Lang.SR test/lang/lang_sr_test.dart
Swedish Lang.SV test/lang/lang_sv_test.dart
Swahili Lang.SW test/lang/lang_sw_test.dart
Tamil Lang.TA test/lang/lang_ta_test.dart
Tajik Lang.TG test/lang/lang_tg_test.dart
Thai Lang.TH test/lang/lang_th_test.dart
Turkmen Lang.TK test/lang/lang_tk_test.dart
Turkish Lang.TR test/lang/lang_tr_test.dart
Ukrainian Lang.UK test/lang/lang_uk_test.dart
Urdu Lang.UR test/lang/lang_ur_test.dart
Uzbek Lang.UZ test/lang/lang_uz_test.dart
Vietnamese Lang.VI test/lang/lang_vi_test.dart
Xhosa Lang.XH test/lang/lang_xh_test.dart
Yoruba Lang.YO test/lang/lang_yo_test.dart
Chinese Lang.ZH test/lang/lang_zh_test.dart
Zulu Lang.ZU test/lang/lang_zu_test.dart

Testing #

The library includes comprehensive tests for each supported language. You can find the language-specific tests under the test/lang/ directory, following the pattern lang_xx_test.dart (e.g., test/lang/lang_en_test.dart, test/lang/lang_vi_test.dart).

API Documentation #

Full API documentation is available on pub.dev once published.

Contributing #

Contributions are welcome! Please feel free to submit issues or pull requests on GitHub.

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Metadata

Number-to-words in 69 languages for Dart. Supports int, double, BigInt, Decimal, and numeric strings. Includes currency, year formatting, and locale-specific options.

Repository (GitHub)

Documentation

API reference

License

MIT (license)

Dependencies

decimal

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