Number to Words Converter
How It Works
Enter any number, select your preferred format, and get instant conversion to words. Our tool handles complex numbers, decimals, and supports over 50 currencies with perfect grammar.
Common Uses
Write checks, prepare legal documents, create invoices, format financial reports, and teach number concepts. Essential for business, legal, educational, and personal use.
Complete Privacy
All processing happens in your browser. Your numbers never leave your device, ensuring complete security for sensitive financial information.
How the Number to Words Converter Works
A Number to Words Converter works like a person who's really good at language changing numbers into words. It does this in a simple steps. Here is how a Number, to Words Converter does it:
- Input Analysis & Validation
When you put a number in the process starts. The tool checks the number to make sure it is real and within the range it is supposed to be. Then it looks at the number. Separates the whole part from any decimal part like, with money. It breaks the number down into groups, like units and thousands and millions and so on, which are the numbers basic place-value groups, the units and the thousands and the millions. - Applying Linguistic Rules
The converter uses dictionaries that are already, inside it to change numbers into words. These dictionaries include:
• Base numbers (0-19, e.g., "seven," "fifteen").
• Multiples of ten (20-90, e.g., "twenty," "sixty").
• Place-value identifiers ("hundred," "thousand," "million"). - Logical Processing & Assembly
The core intelligence is really smart. It breaks down the number into parts, like groups of three digits and then applies the rules of grammar to each part. The core intelligence correctly puts hyphens, in compound numbers like forty-five. The core intelligence also uses the word. In the right way. The core intelligence handles pluralization correctly so it says two million. The core intelligence can even manage cases like the number zero. - Final Formatting & Output
The tool puts all the translated parts with the right spaces and punctuation. When it comes to money it changes decimals into words, like "and fifty cents" or "only". The tool makes a sentence that's perfect and ready to use and it shows the original number exactly right. The result is a sentence that has grammar and it is the final sentence that the tool makes and this sentence represents the original figure of the currency.
Conversion Logic and Formulas
Three-Digit Group Algorithm
For ABC (A=hundreds, B=tens, C=ones): If A>0: ones[A] + "hundred"; Handle BC: if BC=0: skip, if BC<10: ones[BC], if 10-19: teens[BC-10], if ≥20: tens[B] + (C>0 ? "-" + ones[C] : "")
Place Value Scaling
Groups indexed from right: G₀ (units), G₁ (thousands), G₂ (millions), G₃ (billions). Final output = Σ (convertThreeDigit(Gᵢ) + " " + scales[i] + " ") from highest to 0.
Decimal Conversion
Decimal converts to words using same algorithm as integers but with denominator (hundredths, thousandths, etc.). Example: 0.75 → "seventy-five hundredths".
Variable Definitions
N = Original number. I = Integer part. D = Decimal part. G[] = Three-digit groups array. S = Sign. C = Currency suffix. F = Fraction string.
Step-by-Step Examples
Example 1: Check Writing - $1,250.75
Step 2: Chunk I → Groups: [1], [250]
Step 3: Convert → "one thousand", "two hundred fifty"
Step 4: Decimal → 0.75 → "seventy-five hundredths"
Step 5: Format → Add "and" before decimal
Step 6: Currency → Append "dollars"
Example 2: Legal Document - 12,450,789
Step 2: Chunk I → Groups: [12], [450], [789]
Step 3: Convert → "twelve million", "four hundred fifty thousand", "seven hundred eighty-nine"
Step 4: Combine → "twelve million four hundred fifty thousand seven hundred eighty-nine"
Step 5: Case → Capitalize first letter
Example 3: Indian Rupees - ₹45,454,587.23
Step 2: Chunk I → Groups: [45], [454], [587]
Step 3: Convert → "forty-five million", "four hundred fifty-four thousand", "five hundred eighty-seven"
Step 4: Decimal → 0.23 → "twenty-three hundredths"
Step 5: Currency Format → "Rupees" before "and", "Paise" after decimal
Example 4: Euros with Cents - €3,899.99
Step 2: Chunk I → Groups: [3], [899]
Step 3: Convert → "three thousand", "eight hundred ninety-nine"
Step 4: Decimal → 0.99 → "ninety-nine hundredths"
Step 5: Format → Add "and" before decimal
Step 6: Currency → Append "euros"
Example 5: British Pounds - £10,050.00
Step 2: Chunk I → Groups: [10], [050]
Step 3: Convert → "ten thousand", "fifty"
Step 4: Decimal → 0.00 → skip (no fractional part)
Step 5: Currency Format → Append "pounds"
Step 6: Case → Capitalize first letter