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US tablespoons to US teaspoons (tbsp to tsp)
Convert US tablespoons to US teaspoons: 1 tbsp = 3 tsp. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.
Formula
1 tbsp = 3 tsp
US teaspoons = US tablespoons × 3 — reverse: US tablespoons = US teaspoons × 0.3333333333
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 tbsp = 15 tsp
- 12.5 tbsp = 37.5 tsp
- 100 tbsp = 300 tsp
US tablespoons to US teaspoons conversion table
| US tablespoons (tbsp) | US teaspoons (tsp) |
|---|---|
| 1 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 12 |
| 5 | 15 |
| 6 | 18 |
| 7 | 21 |
| 8 | 24 |
| 9 | 27 |
| 10 | 30 |
| 15 | 45 |
| 20 | 60 |
| 25 | 75 |
| 30 | 90 |
| 40 | 120 |
| 50 | 150 |
| 75 | 225 |
| 100 | 300 |
| 200 | 600 |
| 250 | 750 |
| 500 | 1500 |
| 1000 | 3000 |
FAQ
How many US teaspoons are in one tablespoon?
1 tbsp = 3 tsp. 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 tablespoons to US teaspoons?
Multiply the value in US tablespoons by 3: US teaspoons = US tablespoons × 3. For example, 5 tbsp = 15 tsp.
How do I convert US teaspoons back to US tablespoons?
Multiply by the inverse factor 0.3333333333 (US tablespoons = US teaspoons × 0.3333333333), or use the US teaspoons-to-US tablespoons page.
Related conversions
Machine access
- API:
GET https://tttkmbb.com/api/v1/convert?value=5&from_unit=tbsp&to_unit=tsp - MCP: server
https://tttkmbb.com/mcp, toolconvert_unitswith{"value":5,"from_unit":"tbsp","to_unit":"tsp"} - Markdown: https://tttkmbb.com/conversion/tablespoons-to-teaspoons.md · JSON: https://tttkmbb.com/conversion/tablespoons-to-teaspoons.json (add
?value=for a result) · Units: /api/v1/units?quantity=volume - OpenAPI operationId:
convert_units. Freshness:static. Authentication: none.