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Roman Numeral Converter

Convert decimal numbers from 1 to 3999 and modern canonical Roman numerals bidirectionally in your browser.

Input

Private by design: your values never leave your device.

Output

Decimal value

2026

Roman uppercase

MMXXVI

Roman lowercase

mmxxvi

Canonical

yes

Breakdown and explanation

Tokens

M + M + X + X + V + I

Values

1000 + 1000 + 10 + 10 + 5 + 1

Place values

2000 + 20 + 6

Symbol statistics

M:2 · X:2 · V:1 · I:1

Symbol table and rules

C = 100

D = 500

I = 1

L = 50

M = 1000

V = 5

X = 10

Modern canonical forms from I to MMMCMXCIX are supported. Valid subtractive pairs are IV, IX, XL, XC, CD, and CM.

Good to know

The Roman Numeral Converter converts Roman numerals and Arabic numbers directly in your browser. It supports common units such as I, V, X, L, C, D, M, and modern notation and is useful for everyday tasks, school, studies, engineering, travel, shopping, planning, and quick plausibility checks.

Typical searches for this page include convert Roman numerals, XIV to 14, write 2026 in Roman numerals. Calculation runs locally in the browser, without upload or server processing. Modern canonical notation differs from historical variants.

Typical use cases

Quick everyday conversion

Convert values for recipes, measurements, travel, online shopping, DIY work, or product specifications without opening a spreadsheet.

Compare technical values

Use the converter for technical documentation, data sheets, lab values, device settings, or international specifications.

Local calculation without tracking

Entered values stay in the browser. This is useful for drafts, internal calculations, and quick checks where no external service is needed.

Tips for better results

Check unit and rounding

Check the source unit and decide whether the rounded display is sufficient or whether more decimal places are useful.

Cross-check critical values

For legal, medical, safety-critical, or regulated measurement use, compare results with the applicable standard or measurement source.

How it works

Step by step

  1. 1

    Enter a value

    Enter the source value and choose the matching starting unit.

  2. 2

    Compare results

    Target values are calculated automatically and shown in the most important units.

  3. 3

    Use the value

    Copy the matching result into documentation, planning, orders, code, spreadsheets, or notes.

Features

Browser-based conversion

Calculation runs locally. Values are not sent to a server for conversion.

Multiple units at a glance

After input, matching target values are shown immediately in multiple units.

Flexible display

Options such as grouping, decimal places, or source unit help make results easy to review.

Frequently asked questions

Are inputs uploaded when using Roman Numeral Converter?

No. Conversion runs locally in the browser. Entered values are not transferred to Xoricon or another server.

How accurate is the conversion?

The converter uses standardized factors and JavaScript floating-point numbers. Displayed results are rounded and are not intended for regulated metrology or uncertainty calculations.

Can I see multiple units at once?

Yes. Many converters show several matching target values after one input, so you can quickly find the relevant unit.

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