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US cups to US fluid ounces (cup to fl oz)
Convert US cups to US fluid ounces: 1 cup = 8 fl oz. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 cup = 8 fl oz
US fluid ounces = US cups × 8 — reverse: US cups = US fluid ounces × 0.125
The factor is derived from the SI definitions of both units (base unit: L) 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 cup = 40 fl oz
- 12.5 cup = 100 fl oz
- 100 cup = 800 fl oz
US cups to US fluid ounces conversion table
| US cups (cup) | US fluid ounces (fl oz) |
|---|---|
| 1 | 8 |
| 2 | 16 |
| 3 | 24 |
| 4 | 32 |
| 5 | 40 |
| 6 | 48 |
| 7 | 56 |
| 8 | 64 |
| 9 | 72 |
| 10 | 80 |
| 15 | 120 |
| 20 | 160 |
| 25 | 200 |
| 30 | 240 |
| 40 | 320 |
| 50 | 400 |
| 75 | 600 |
| 100 | 800 |
| 200 | 1600 |
| 250 | 2000 |
| 500 | 4000 |
| 1000 | 8000 |
FAQ
How many US fluid ounces are in one cup?
1 cup = 8 fl oz. 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 US cups to US fluid ounces?
Multiply the value in US cups by 8: US fluid ounces = US cups × 8. For example, 5 cup = 40 fl oz.
How do I convert US fluid ounces back to US cups?
Multiply by the inverse factor 0.125 (US cups = US fluid ounces × 0.125), or use the US fluid ounces-to-US cups page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=cup_us&to_unit=fl_oz_us - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"cup_us","to_unit":"fl_oz_us"} - Markdown: https://tttkmbb.com/conversion/cups-to-fl-oz.md · JSON: https://tttkmbb.com/conversion/cups-to-fl-oz.json (add
?value=for a result) · Units: /api/v1/units?quantity=volume - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.