Roman Numerals Converter User Guide

1. Accessing the Converter

1. Open the converter in any modern web browser
2. You’ll see a clean interface with:
   • Input field at the center
   • Two conversion buttons
   • Result display area

2. Converting Numbers to Roman Numerals

Steps:

1. Enter any number between 1 and 3999 in the input field
2. Click the “Convert to Roman” button (purple button)
3. View results in the display area below

Example Input:
2023 → Result: MMXXIII

Validation Rules:

• Only integers between 1-3999 accepted
• Decimal numbers will be rejected
• Numbers above 3999 show error message

3. Converting Roman Numerals to Numbers

Steps:

1. Enter valid Roman numerals in the input field (case-insensitive)
2. Click the “Convert to Number” button
3. See the numeric equivalent displayed

Example Input:
XLVII → Result: 47

Accepted Characters:
I, V, X, L, C, D, M (both uppercase and lowercase)

4. Error Handling

The converter will show helpful error messages for:

• Empty input fields
• Non-numeric characters in number conversion
• Invalid Roman numeral combinations
• Numbers outside 1-3999 range

Error Display:

5. Input Restrictions

Conversion Type	Allowed Characters
Number → Roman	0-9 only
Roman → Number	I,V,X,L,C,D,M

6. Special Features

• Auto-formatting: Roman numerals automatically converted to uppercase
• Instant Feedback: Smooth animations for result display
• Responsive Design: Works perfectly on mobile devices
• Input Validation: Real-time checks during typing

7. Best Practices

1. For Roman numeral input:
   • Use proper subtractive notation (e.g., IV instead of IIII)
   • Avoid invalid combinations like VX or IC
2. For number input:
   • Stay within 1-3999 range
   • Use whole numbers only

8. Troubleshooting

Common Issues:

• “Invalid input” error: Check for special characters or spaces
• Blank result: Ensure you clicked a conversion button
• Number too large: Use value ≤3999

Solutions:

1. Refresh the page if unexpected errors occur
2. Verify input follows Roman numeral rules
3. Check console (F12) for technical errors (developers only)

9. Examples of Valid Conversions

Number	Roman Numeral
4	IV
9	IX
58	LVIII
99	XCIX
499	CDXCIX
2024	MMXXIV