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US teaspoons to Milliliters (tsp to mL)
Convert US teaspoons to milliliters: 1 tsp = 4.92892 mL. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 tsp = 4.92892 mL
milliliters = US teaspoons × 4.928921594 — reverse: US teaspoons = milliliters × 0.2028841362
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 tsp = 24.6446 mL
- 12.5 tsp = 61.6115 mL
- 100 tsp = 492.892 mL
US teaspoons to milliliters conversion table
| US teaspoons (tsp) | Milliliters (mL) |
|---|---|
| 1 | 4.92892 |
| 2 | 9.85784 |
| 3 | 14.7868 |
| 4 | 19.7157 |
| 5 | 24.6446 |
| 6 | 29.5735 |
| 7 | 34.5025 |
| 8 | 39.4314 |
| 9 | 44.3603 |
| 10 | 49.2892 |
| 15 | 73.9338 |
| 20 | 98.5784 |
| 25 | 123.223 |
| 30 | 147.868 |
| 40 | 197.157 |
| 50 | 246.446 |
| 75 | 369.669 |
| 100 | 492.892 |
| 200 | 985.784 |
| 250 | 1232.23 |
| 500 | 2464.46 |
| 1000 | 4928.92 |
FAQ
How many milliliters are in one teaspoon?
1 tsp = 4.92892 mL. 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 teaspoons to milliliters?
Multiply the value in US teaspoons by 4.928921594: milliliters = US teaspoons × 4.928921594. For example, 5 tsp = 24.6446 mL.
How do I convert milliliters back to US teaspoons?
Multiply by the inverse factor 0.2028841362 (US teaspoons = milliliters × 0.2028841362), or use the milliliters-to-US teaspoons page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=tsp&to_unit=mL - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"tsp","to_unit":"mL"} - Markdown: https://tttkmbb.com/conversion/teaspoons-to-ml.md · JSON: https://tttkmbb.com/conversion/teaspoons-to-ml.json (add
?value=for a result) · Units: /api/v1/units?quantity=volume - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.