Ad Slot
Roman Numeral Converter
Convert numbers to Roman numerals and back.
Ad Slot
Ad Slot
Frequently asked questions
What's the valid range for converting a number to Roman numerals?
1 to 3999 — standard Roman numerals have no symbol for zero or for numbers at or above 4000, so anything outside that range just shows "Out of range".
Does converting from Roman numerals catch invalid or non-standard input?
It catches unrecognized letters, but it doesn't strictly enforce canonical form — a non-standard sequence like "IIII" will still be summed up rather than flagged as malformed.
Ad Slot
Related tools
Ad Slot