Ancient VolumeUS Gallons to Roman Modius

US gallons to Roman modius

Methodology·How We Verify

Snapshot

1 US gallon equals 0.43361 Roman modius.

Reference basis: This conversion uses one fixed ancient-volume reference value anchored to liters.
Example: For 5 US gallons, the result equals 2.168048 Roman modius.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

0.43361 Roman modius (modius)

Switch

API and AI agent access

US gallons to Roman modius.

Machine-readable identifiers

Conversion family: ancient-volume
Source unit: us_gallons
Target unit: roman_modius

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "ancient-volume",
  "value": 1,
  "from": "us_gallons",
  "to": "roman_modius"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "ancient-volume",
    "value": 1,
    "from": "us_gallons",
    "to": "roman_modius",
    "result": {
      "raw": 0.43360959725085907,
      "display": "0.43361"
    },
    "canonicalPath": "/ancient-volume/us-gallons-to-roman-modius/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

The converter converts US gallon into Roman modius using one fixed ancient-volume reference model. Formula: Roman modius = US gallon × 0.43361.

Ancient volume measures varied across places and periods, so this page keeps one canonical approximation for modern reference rather than implying a single historical standard across all use cases.

Historical reference: this is a fixed modern approximation. A specific period, locality and primary measurement source have not been established for every unit in this dataset. Check those details before applying it to an artifact or historical record.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 US gallon = 0.43361 Roman modius.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Reference note

This US gallons to Roman modius page uses a single canonical historical factor model for consistency across calculator and table values.

Historical measures may differ across regions and time periods.
This converter keeps one fixed definition so mirror pages remain internally consistent.
Use this as a practical reference baseline, then compare with specialized historical sources if needed.

Common Conversion Values

US gallons (gal (US))	Roman modius (modius)
1	0.43361
5	2.168048
10	4.336096
25	10.84024
100	43.36096
1000	433.609597

Questions & answers

Frequently Asked Questions

Is there a reverse Roman modius to US gallon page?

Yes. Use the mirror Roman modius to US gallon page to convert in the opposite direction with the same fixed reference model.