Home › Unit Conversion › Days to Months (30 days)
Days to Months (30 days) (d to mo)
Convert days to months (30 days): 1 d = 0.0333333 mo. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 d = 0.0333333 mo
months (30 days) = days × 0.03333333333 — reverse: days = months (30 days) × 30
The factor is derived from the SI definitions of both units (base unit: s) as listed in NIST SP 811; results on this page are shown to 6 significant figures, the API returns up to 12.
Worked examples
- 5 d = 0.166667 mo
- 12.5 d = 0.416667 mo
- 100 d = 3.33333 mo
Days to months (30 days) conversion table
| Days (d) | Months (30 days) (mo) |
|---|---|
| 1 | 0.0333333 |
| 2 | 0.0666667 |
| 3 | 0.1 |
| 4 | 0.133333 |
| 5 | 0.166667 |
| 6 | 0.2 |
| 7 | 0.233333 |
| 8 | 0.266667 |
| 9 | 0.3 |
| 10 | 0.333333 |
| 15 | 0.5 |
| 20 | 0.666667 |
| 25 | 0.833333 |
| 30 | 1 |
| 40 | 1.33333 |
| 50 | 1.66667 |
| 75 | 2.5 |
| 100 | 3.33333 |
| 200 | 6.66667 |
| 250 | 8.33333 |
| 500 | 16.6667 |
| 1000 | 33.3333 |
FAQ
How many months (30 days) are in one day?
1 d = 0.0333333 mo. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures.
What is the formula to convert days to months (30 days)?
Multiply the value in days by 0.03333333333: months (30 days) = days × 0.03333333333. For example, 5 d = 0.166667 mo.
How do I convert months (30 days) back to days?
Multiply by the inverse factor 30 (days = months (30 days) × 30), or use the months (30 days)-to-days page.
Related conversions
- Months (30 days) to days (reverse)
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- Days to Weeks
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=day&to_unit=month_30 - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"day","to_unit":"month_30"} - Markdown: https://tttkmbb.com/conversion/days-to-months.md · JSON: https://tttkmbb.com/conversion/days-to-months.json (add
?value=for a result) · Units: /api/v1/units?quantity=time - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.