ConvBolt — Unit ConverterTeaspoons to Milliliters Converter
Converting teaspoons to milliliters is a multiplication by a fixed factor: 1 tsp = 4.928922 ml. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.
Because one teaspoon works out to 4.928922 ml, the milliliter is the larger unit of the two: a figure given in milliliter always carries a larger number than the same measurement in teaspoon. A chart drawn in tsp can hide that, so check which label the axis uses before you compare two readings.
When a container size is certified in milliliters but you are dosing in teaspoons, it pays to convert from the certified figure rather than from a rounded label.
The conversion factor used here is 4.928922 ml per teaspoon (6 significant digits as shown). Kept to seven figures it covers professional measurement; if you round it to two or three decimals for a spreadsheet, the error scales with the input — at a value of 1,000 tsp a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 0.2028841 tsp per ml, the exact reciprocal, so a round trip through both pages returns your original number.
Teaspoons to Milliliters formula
Use this formula to convert any teaspoon value to milliliters:
Worked example: 100 tsp × 4.928922 = 492.8922 ml.
Teaspoons to Milliliters conversion table
| Teaspoons (tsp) | Milliliters (ml) |
|---|---|
| 0.5 tsp | 2.464461 ml |
| 1 tsp | 4.928922 ml |
| 2 tsp | 9.857843 ml |
| 5 tsp | 24.64461 ml |
| 10 tsp | 49.28922 ml |
| 20 tsp | 98.57843 ml |
| 50 tsp | 246.4461 ml |
| 100 tsp | 492.8922 ml |
| 500 tsp | 2464.461 ml |
| 1000 tsp | 4928.922 ml |
How to convert teaspoons to milliliters
Multiply the teaspoon value by 4.928922 to get the equivalent in milliliters. This single factor works for every value in the table above and for anything else you need — there is no per-value adjustment, which is why a conversion table and a calculator always agree.
If you need the opposite direction, use the Milliliters to Teaspoons converter instead of dividing by hand; both pages use the same source factors. For every other tsp conversion in one place, see the tsp conversion hub.
Frequently asked questions
How many milliliters are in 1 teaspoon?
1 teaspoon = 4.928922 ml.
What is 100 teaspoons in milliliters?
100 tsp = 492.8922 ml.
Is converting teaspoons to milliliters the same as milliliters to teaspoons?
No — the direction changes the multiplier. The reverse conversion (1 ml = 0.2028841 tsp) is on the Milliliters to Teaspoons page.
Related conversions
Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.