Small java library created to convert numbers to their word representations
Java Groovy
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Tradukisto is a Java library created to convert numbers to their word representations.

The main motivation behind its creation was lack of a production ready tool which provides numbers conversion for the Polish language. There are many single classes, but we felt there is definitely space for something well tested and ready to use in production without copy pasting someone else's code.


  • Converts Integer to String with numerical representation support.
  • Converts BigDecimal to String with money representation support.

Supported languages

  • English
  • Polish
  • Czech
  • Russian
  • German


Add tradukisto as dependency:

repositories {

dependencies {
    compile ''

and use it:

ValueConverter converter = ValueConverters.ENGLISH_INTEGER;
String valueAsWords = converter.asWords(1_234);

assertEquals("one thousand two hundred thirty-four", valueAsWords);
MoneyConverter converter = MoneyConverters.ENGLISH_BANKING_MONEY_VALUE;
String moneyAsWords = converter.asWords(new BigDecimal("1234.56"));

assertEquals("one thousand two hundred thirty-four £ 56/100", moneyAsWords);

Tradukisto can handle only values with no more than two digits after the decimal point. Otherwise IllegalArgumentException will be thrown. For that reason you should either construct BigDecimal object based on String value as shown in example above or use setScale method to ensure that given value has appropriate precision.


Copyright 2015 Allegro Group

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.