Words to Numbers Converter

Convert written numbers and number words to numeric digits. Intelligent parsing for complex numbers, fractions, ordinals, and multiple language formats.

Words to Numbers Converter

Basic

Large

Complex

Fractions

Ordinals

Decimals

Single Input Converter

25
100% confidence
cardinal

Bulk Text Input

Conversion Statistics

15
Total Inputs
13
Successful
2
Failed
95%
Avg Confidence

Intelligent number word parsing!

Convert written numbers to digits with support for fractions, ordinals, and complex expressions

Understanding Number Word Conversion

Number word conversion is the process of parsing written or spoken number representations and converting them to their numeric equivalents. This involves understanding linguistic patterns, grammatical rules, and cultural conventions for expressing quantities.

Core Challenges

  • Ambiguous word boundaries and hyphenation
  • Multiple valid representations for same number
  • Context-dependent interpretation
  • Regional and cultural variations
  • Mixed numeric and word formats
  • Ordinal vs cardinal number distinction
  • Fraction and decimal representations
  • Scale word interpretation (million, billion)

Applications

  • Voice recognition and speech processing
  • Natural language processing systems
  • Document digitization and OCR
  • Financial document processing
  • Educational assessment tools
  • Accessibility and assistive technology
  • Data extraction and mining
  • Automated form processing

English Number Word Patterns

Basic Number Words (0-19)

0-9

zero → 0
one → 1
two → 2
three → 3
four → 4
five → 5
six → 6
seven → 7
eight → 8
nine → 9

10-19

ten → 10
eleven → 11
twelve → 12
thirteen → 13
fourteen → 14
fifteen → 15
sixteen → 16
seventeen → 17
eighteen → 18
nineteen → 19

Tens (20-90)

twenty → 20
thirty → 30
forty → 40
fifty → 50
sixty → 60
seventy → 70
eighty → 80
ninety → 90

Scale Words

hundred → 100
thousand → 1,000
million → 1,000,000
billion → 1,000,000,000
trillion → 1,000,000,000,000

Compound Number Formation

Hyphenated Compounds (21-99)

twenty-one → 21
thirty-five → 35
forty-seven → 47
sixty-eight → 68
ninety-nine → 99

Hundreds Formation

one hundred → 100
two hundred fifty → 250
three hundred forty-five → 345
nine hundred ninety-nine → 999

Large Number Patterns

Thousands

one thousand → 1,000
five thousand → 5,000
twenty-five thousand → 25,000
one hundred thousand → 100,000
nine hundred ninety-nine thousand → 999,000

Millions and Beyond

one million → 1,000,000
two point five million → 2,500,000
one billion → 1,000,000,000
three trillion → 3,000,000,000,000

Special Number Formats and Edge Cases

Fractions and Decimals

Common Fractions

one half → 0.5
one third → 0.333...
one quarter → 0.25
three quarters → 0.75
two thirds → 0.667...
one eighth → 0.125

Decimal Words

one point five → 1.5
three point fourteen → 3.14
zero point zero one → 0.01
twenty-five point seven → 25.7

Mixed Numbers

two and a half → 2.5
three and one quarter → 3.25
five and two thirds → 5.667...
ten and three eighths → 10.375

Ordinal Numbers

Basic Ordinals

first → 1st (or 1)
second → 2nd (or 2)
third → 3rd (or 3)
fourth → 4th (or 4)
fifth → 5th (or 5)
twentieth → 20th (or 20)
twenty-first → 21st (or 21)

Complex Ordinals

one hundredth → 100th (or 100)
one thousandth → 1000th (or 1000)
two millionth → 2,000,000th
thirty-second → 32nd (or 32)

Alternative Representations

Informal/Slang

a dozen → 12
a score → 20
a couple → 2
a few → 3 (approximate)
several → 7 (approximate)

Scientific Notation

one times ten to the third → 1,000
two point five times ten to the sixth → 2,500,000
one point zero one times ten to the second → 101

Currency/Financial

five dollars → 5 (or $5)
twenty-five cents → 0.25
one thousand dollars → 1000
two million dollars → 2,000,000

Parsing Algorithms and Techniques

Tokenization and Recognition

Lexical Analysis

1. Tokenization: Split text into words
2. Normalization: Handle case, punctuation
3. Recognition: Identify number words
4. Classification: Categorize by type
5. Validation: Check for valid patterns

Pattern Matching

Regex Patterns: /\\b(one|two|three)\\b/
Compound Detection: twenty-one, thirty-five
Scale Recognition: thousand, million, billion
Fraction Patterns: half, quarter, third
Ordinal Suffixes: first, second, third

Conversion Strategies

Bottom-Up Parsing

Start with basic number words
Build compound numbers
Apply scale multipliers
Combine partial results
Validate final number

State Machine

Define parsing states
Transition on word types
Accumulate numeric values
Handle state conflicts
Output final result

Grammar-Based

Define number grammar rules
Parse using formal grammar
Build abstract syntax tree
Evaluate tree to number
Handle ambiguous parses

International Number Systems

European Languages

Spanish

uno → 1
veinte → 20
cien → 100
mil → 1,000
millón → 1,000,000

French

un → 1
vingt → 20
cent → 100
mille → 1,000
million → 1,000,000

German

eins → 1
zwanzig → 20
hundert → 100
tausend → 1,000
Million → 1,000,000

Asian Number Systems

Chinese (Mandarin)

一 (yī) → 1
十 (shí) → 10
百 (bǎi) → 100
千 (qiān) → 1,000
万 (wàn) → 10,000
亿 (yì) → 100,000,000

Japanese

一 (ichi) → 1
十 (jū) → 10
百 (hyaku) → 100
千 (sen) → 1,000
万 (man) → 10,000
億 (oku) → 100,000,000

Professional Applications

🎤

Speech Recognition

Voice assistants, dictation software, automated transcription, and accessibility tools

📄

Document Processing

OCR systems, legal document analysis, financial report processing, and data extraction

🧠

Natural Language Processing

Chatbots, language models, text analysis, and automated content understanding

🎓

Educational Technology

Math learning apps, assessment tools, language learning platforms, and adaptive tutoring

💰

Financial Systems

Check processing, invoice parsing, accounting automation, and financial data analysis

♿

Accessibility

Screen readers, assistive technology, voice navigation, and inclusive design solutions

Best Practices and Implementation Guidelines

✅ Effective Parsing

  • Handle multiple valid representations for same number
  • Implement robust error handling and fallback strategies
  • Consider context and domain-specific conventions
  • Support both formal and informal number expressions
  • Validate results against reasonable ranges
  • Provide confidence scores for ambiguous cases
  • Test with diverse linguistic patterns and edge cases
  • Implement incremental parsing for better performance

❌ Common Pitfalls

  • Ignoring regional and cultural number variations
  • Poor handling of compound and hyphenated numbers
  • Not considering ordinal vs cardinal distinctions
  • Inadequate fraction and decimal support
  • Missing edge cases like negative numbers
  • Overly rigid parsing that fails on valid inputs
  • Not handling mixed numeric and word formats
  • Insufficient testing with real-world text data

Advanced Features and Extensions

Machine Learning Integration

Neural Network Approaches

• Sequence-to-sequence models for complex parsing
• Attention mechanisms for long-range dependencies
• Transfer learning from pre-trained language models
• Multi-task learning for related NLP tasks

Training Strategies

• Synthetic data generation for edge cases
• Active learning for difficult examples
• Domain adaptation for specialized vocabularies
• Multilingual training for cross-language support

Context-Aware Processing

Semantic Context

Domain-specific number interpretation
Unit and measurement awareness
Currency and financial context
Temporal and date-related numbers

Linguistic Context

Part-of-speech tagging integration
Syntactic dependency parsing
Named entity recognition
Coreference resolution

Pragmatic Context

User intent understanding
Conversational context tracking
Ambiguity resolution strategies
Confidence-based decision making