Free Roman Numeral Converter
Numbers, years and dates to Roman numerals. Free, no signup
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Read the full description
A Roman numeral converter that does more than basic conversion. It converts both ways (number to Roman and Roman to number) and supports values up to 3,999,999 using overline (vinculum) notation. It updates live as you type and flags invalid numerals like IIII or VV. It also shows a symbol-by-symbol breakdown, so you learn how each numeral is built. Extras include a date converter for birthdays and tattoos, a reference chart, copy buttons and history. No signup.
Visit website ↗ Source listing ↗
PH · launched Oct 18, 2026 · 2 upvotes (top 23%)
- Horizontal
- Workflow automation
- B2C
- Not AI
- Hobby / open-source project
- Productivity
- Education
Similar launches
See all 192 similar launches →Could you build this?
Yes Roman numeral conversion is a small deterministic algorithm with a simple live-updating UI. It can be vibe-coded in an afternoon.
Competitors
Other products that read as similar to this one : 192 launches clear the similarity bar, closest 8 shown.
Attention rank: #12 of 193 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 338 days after the earliest competitor.
- Age Calculator by FreeWWW · ph · 2026-10-13 · 2 upvotes · similarity 0.47
- CalcolaDate · ph · 2026-10-19 · 1 upvotes · similarity 0.47
- billycalc · ph · 2026-10-07 · 1 upvotes · similarity 0.47
- Age Calculator · ph · 2026-10-05 · 1 upvotes · similarity 0.47
- Calmatro Free Calculators & Converters · ph · 2026-09-15 · 1 upvotes · similarity 0.46
- Chronological Age Calculator · ph · 2026-09-25 · 1 upvotes · similarity 0.46
- Rounding Solver · ph · 2026-10-09 · 1 upvotes · similarity 0.43
- ConversionsHome · ph · 2026-09-27 · 1 upvotes · similarity 0.43
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More details
- External ID
- 1283015
- Company
- n/a
- Product
- HEIC to JPG Converter
- Website domain
- producthunt.com
- Cohort
- n/a
- Upvotes percentile
- 0.77
- All tags
- Productivity, Education
- AI summary
- number converter for roman numerals
- Manually corrected
- No