This teaspoons to milliliters converter gives you the tsp to mL result instantly, in your browser, with the exact ratio so you can verify it. 1 teaspoon is about 4.92892 milliliters, and going the other way, 1 milliliter is 0.202884 teaspoons. Teaspoons are a US customary unit; milliliters are part of the metric system used in most countries.
To convert by hand, multiply the number of teaspoons by 4.92892. For example, 10 teaspoons is 49.2892 milliliters and 100 teaspoons is 492.892 milliliters. The table below lists the most requested values, and the converter above accepts decimals for anything in between.
tsp to mL formula
mL = tsp × 4.92892
1 teaspoon is about 4.92892 milliliters. Multiply the value in teaspoons by that factor to get milliliters.
Teaspoons to Milliliters conversion table
| teaspoons | milliliters | Rounded |
|---|---|---|
| 1 tsp | 4.92892 mL | 4.93 |
| 2 tsp | 9.85784 mL | 9.86 |
| 3 tsp | 14.7868 mL | 14.8 |
| 4 tsp | 19.7157 mL | 19.7 |
| 5 tsp | 24.6446 mL | 24.6 |
| 6 tsp | 29.5735 mL | 29.6 |
| 7 tsp | 34.5025 mL | 34.5 |
| 8 tsp | 39.4314 mL | 39.4 |
| 9 tsp | 44.3603 mL | 44.4 |
| 10 tsp | 49.2892 mL | 49.3 |
| 12 tsp | 59.1471 mL | 59.1 |
| 15 tsp | 73.9338 mL | 73.9 |
| 20 tsp | 98.5784 mL | 98.6 |
| 25 tsp | 123.223 mL | 123 |
| 30 tsp | 147.868 mL | 148 |
| 40 tsp | 197.157 mL | 197 |
| 50 tsp | 246.446 mL | 246 |
| 60 tsp | 295.735 mL | 296 |
| 70 tsp | 345.025 mL | 345 |
| 75 tsp | 369.669 mL | 37 |
| 80 tsp | 394.314 mL | 394 |
| 90 tsp | 443.603 mL | 444 |
| 100 tsp | 492.892 mL | 493 |
| 150 tsp | 739.338 mL | 739 |
| 200 tsp | 985.784 mL | 986 |
| 250 tsp | 1,232.23 mL | 1,232 |
| 300 tsp | 1,478.68 mL | 1,479 |
| 500 tsp | 2,464.46 mL | 2,464 |
| 750 tsp | 3,696.69 mL | 3,697 |
| 1,000 tsp | 4,928.92 mL | 4,929 |
Frequently asked questions
How many milliliters are in 5 teaspoons?
5 tsp = 24.6446 mL. Multiply 5 by 4.92892, the number of milliliters in one teaspoon. The converter on this page does the same arithmetic for any value, including decimals.
What is the formula to convert teaspoons to milliliters?
mL = tsp × 4.92892. The factor comes from the definitions of the units: 1 teaspoon is about 4.92892 milliliters. Worked example: 12 tsp = 59.1471 mL.
Is 30 tsp the same as 147.868 mL?
Yes. 30 tsp = 147.868 mL. Rounded to four decimals it is 147.9 mL.
How do I convert milliliters back to teaspoons?
Divide by 4.92892, or multiply by 0.202884: 1 milliliter is 0.202884 teaspoons. The milliliters to teaspoons page linked above lists common values the other way.
Is the tsp to mL conversion exact?
1 teaspoon is about 4.92892 milliliters. The ratio is a defined constant but produces a long decimal, so this page rounds to six significant digits, which is more precision than any everyday measurement needs.