Updated · Methodology: named formula library
1 tsp = 4.929 mL. To convert tsp to mL, multiply by 4.929. To convert mL back to tsp, multiply by 0.202884.
Teaspoons to Milliliters
Convert tsp to ml.
1 tsp converts to 4.93 mL.
1 tsp = 4.9289 mL. To convert tsp to mL, multiply by 4.9289. To go the other direction, multiply mL by 0.202884.
How the conversion works
The relationship is linear: every value of tsp maps to exactly 4.9289 mL, scaling proportionally. 1 tsp = 4.9289 mL.
Common conversion values
- 1 tsp = 4.9289 mL
- 10 tsp = 49.2892 mL
- 100 tsp = 492.89 mL
- 1,000 tsp = 4928.92 mL
See the [forward](#chart) and [reverse](#reverse-chart) charts below for additional values.
Quick mental shortcut
Multiply by 4.9289 (tsp → mL) or by 0.202884 (mL → tsp).
Accuracy note
The factor used here (4.9289) is rounded to 6 significant figures, which is sufficient for most everyday use including cooking, fitness, height comparisons, and shipping. For scientific, engineering, or trade-regulated contexts, use the full-precision factor or the official defining relationship cited above. Conversions in this calculator are computed at full double-precision; only the displayed values are rounded.
Worked Example
Convert 1 tsp to mL
- value
- 1
- Result
- 4.9289 mL
1 × 4.92892 = 4.9289 mL.
tsp to mL Chart
| tsp | mL |
|---|---|
| 1 tsp | 4.929 mL |
| 2 tsp | 9.858 mL |
| 3 tsp | 14.787 mL |
| 5 tsp | 24.645 mL |
| 10 tsp | 49.289 mL |
| 20 tsp | 98.578 mL |
| 25 tsp | 123.22 mL |
| 50 tsp | 246.45 mL |
| 75 tsp | 369.67 mL |
| 100 tsp | 492.89 mL |
| 200 tsp | 985.78 mL |
| 500 tsp | 2,464.46 mL |
| 1,000 tsp | 4,928.92 mL |
| 5,000 tsp | 24,645 mL |
Multiplier: × 4.929
mL to tsp Chart
| mL | tsp |
|---|---|
| 1 mL | 0.202884 tsp |
| 2 mL | 0.405768 tsp |
| 3 mL | 0.608653 tsp |
| 5 mL | 1.014 tsp |
| 10 mL | 2.029 tsp |
| 20 mL | 4.058 tsp |
| 25 mL | 5.072 tsp |
| 50 mL | 10.144 tsp |
| 75 mL | 15.216 tsp |
| 100 mL | 20.288 tsp |
| 200 mL | 40.577 tsp |
| 500 mL | 101.44 tsp |
| 1,000 mL | 202.88 tsp |
| 5,000 mL | 1,014.42 tsp |
Multiplier: × 0.202884
Common Specific Values
10 tsp to mL
10 tsp equals 49.289 mL. (10 × 4.929 = 49.289)
25 tsp to mL
25 tsp equals 123.22 mL. (25 × 4.929 = 123.22)
50 tsp to mL
50 tsp equals 246.45 mL. (50 × 4.929 = 246.45)
100 tsp to mL
100 tsp equals 492.89 mL. (100 × 4.929 = 492.89)
500 tsp to mL
500 tsp equals 2,464.46 mL. (500 × 4.929 = 2,464.46)
When to Use This Calculator
- Convert between metric and imperial without searching for factors.
- Verify a unit-aware calculation in engineering, science, or cooking.
- Translate specifications across U.S. and international standards.
Limitations & Common Mistakes
- Results are estimates, real-world outcomes depend on factors not captured in a simplified calculation.
- Always verify critical numbers against an authoritative source or domain expert before acting on them.
Frequently Asked Questions
How do you convert tsp to mL?
Multiply by 4.92892. So 1 tsp = 4.92892 mL, and 10 tsp = 49.2892 mL. This conversion factor is exact (or rounded to 2 decimals for practical use).
Where does the 4.92892 come from?
It's the standard SI/US-customary conversion factor for tsp → mL, defined by NIST and BIPM. The CalcIntel Teaspoons to Milliliters uses the same factor your physics textbook, government conversion table, and Wolfram Alpha would use.
How accurate is this conversion?
Mathematically exact. The only loss of precision comes from rounding the displayed result to 2 decimals. For scientific applications requiring more precision, multiply by the factor manually.
Can I convert in the other direction?
Yes — divide by 4.92892 to convert from mL back to tsp, or use the CalcIntel mL-to-tsp calculator if available.
Is 1 teaspoon the same as 5 mL?
1 tsp equals 4.9289 mL — that's effectively the same as 5 ml. Use the chart below for exact values at common quantities.
Is 2 teaspoons the same as 10 mL?
2 tsp equals 9.8578 mL — that's effectively the same as 10 ml. Use the chart below for exact values at common quantities.
What does the T stand for in baking?
1 tsp = 4.9289 mL. To convert tsp to mL, multiply by 4.9289; to convert mL back to tsp, multiply by 0.202884. See the conversion chart below for ready-made values.
Is 1 tsp 30 mL?
1 tsp equals 4.9289 mL — that's different from 30 ml. Use the chart below for exact values at common quantities.
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Source: BLS Consumer Price Index, 2026.