US teaspoons to Metric teaspoons
Type a value in US teaspoons and get the result in Metric teaspoons, calculated exactly.
1 US teaspoons = 0.98578431875 Metric teaspoons
Precision
Exact factorThis result is exact.
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Formula
tsp (metric) = tsp (US) × 0.98578431875
To convert US teaspoons to Metric teaspoons, multiply the value by 0.98578431875.
Worked examples
- 1 tsp (US) × 0.98578431875 = 0.98578431875 tsp (metric)
- 100 tsp (US) × 0.98578431875 = 98.578431875 tsp (metric)
- 50 tsp (US) × 0.98578431875 = 49.2892159375 tsp (metric)
This factor is exact by definition.
Conversion table
| US teaspoons (tsp (US)) | Metric teaspoons (tsp (metric)) |
|---|---|
| 0.25 | ≈ 0.2464461 |
| 0.5 | 0.492892159375 |
| 0.75 | ≈ 0.7393382 |
| 1 | 0.98578431875 |
| 1.5 | 1.478676478125 |
| 2 | 1.9715686375 |
| 2.5 | 2.464460796875 |
| 3 | 2.95735295625 |
| 4 | 3.943137275 |
| 5 | 4.92892159375 |
| 6 | 5.9147059125 |
| 8 | 7.88627455 |
| 10 | 9.8578431875 |
Values marked ≈ are rounded; the rest are exact.
Reverse table: Metric teaspoons to US teaspoons
| Metric teaspoons (tsp (metric)) | US teaspoons (tsp (US)) |
|---|---|
| 0.25 | ≈ 0.2536052 |
| 0.5 | ≈ 0.5072103 |
| 0.75 | ≈ 0.7608155 |
| 1 | ≈ 1.014421 |
| 1.5 | ≈ 1.521631 |
| 2 | ≈ 2.028841 |
| 2.5 | ≈ 2.536052 |
| 3 | ≈ 3.043262 |
| 4 | ≈ 4.057683 |
| 5 | ≈ 5.072103 |
| 6 | ≈ 6.086524 |
| 8 | ≈ 8.115365 |
| 10 | ≈ 10.14421 |
Unit definitions
- US teaspoons tsp (US)
- One third of a US tablespoon: exactly 4.92892159375 mL.
- Metric teaspoons tsp (metric)
- Exactly 5 mL.
Questions people ask
US teaspoons to Metric teaspoons: what is the conversion factor?
One tsp (US) is 0.98578431875 tsp (metric).
How do I convert US teaspoons to Metric teaspoons?
Use the formula above. For example, 100 tsp (US) = 98.578431875 tsp (metric).
Is the conversion exact?
Yes. Both units have exact definitions, so the factor is exact; a result is only rounded when its decimals never end.
Factors checked 19 October 2026.