Milliliters to Teaspoons Converter

Volume conversion · Updated 2026-10-04

Milliliters (ml)

Teaspoons (tsp)

Converting milliliters to teaspoons is a multiplication by a fixed factor: 1 ml = 0.2028841 tsp. The table below covers the values people look up most often, and the formula section shows exactly where that factor comes from.

Because one milliliter works out to 0.2028841 tsp, the teaspoon is the much smaller unit of the two: a figure given in teaspoon always carries a smaller number than the same measurement in milliliter. A chart drawn in ml can hide that, so check which label the axis uses before you compare two readings.

When a container size is certified in teaspoons but you are dosing in milliliters, it pays to convert from the certified figure rather than from a rounded label.

The conversion factor used here is 0.2028841 tsp per milliliter (7 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 ml a factor rounded to three decimals can be off by a measurable amount. The reverse direction uses 4.928922 ml per tsp, the exact reciprocal, so a round trip through both pages returns your original number.

Milliliters to Teaspoons formula

Use this formula to convert any milliliter value to teaspoons:

tsp = ml × 0.2028841

Worked example: 100 ml × 0.2028841 = 20.28841 tsp.

Milliliters to Teaspoons conversion table

Milliliters (ml)	Teaspoons (tsp)
0.5 ml	0.1014421 tsp
1 ml	0.2028841 tsp
2 ml	0.4057683 tsp
5 ml	1.014421 tsp
10 ml	2.028841 tsp
20 ml	4.057683 tsp
50 ml	10.14421 tsp
100 ml	20.28841 tsp
500 ml	101.4421 tsp
1000 ml	202.8841 tsp

How to convert milliliters to teaspoons

Multiply the milliliter value by 0.2028841 to get the equivalent in teaspoons. 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 Teaspoons to Milliliters converter instead of dividing by hand; both pages use the same source factors. For every other ml conversion in one place, see the ml conversion hub.

Frequently asked questions

How many teaspoons are in 1 milliliter?
1 milliliter = 0.2028841 tsp.

What is 100 milliliters in teaspoons?
100 ml = 20.28841 tsp.

Is converting milliliters to teaspoons the same as teaspoons to milliliters?
No — the direction changes the multiplier. The reverse conversion (1 tsp = 4.928922 ml) is on the Teaspoons to Milliliters page.

Related conversions

tsp to ml ml to L ml to m³ ml to tbsp ml to fl oz ml to cup ml to pt L to tsp m³ to tsp tbsp to tsp fl oz to tsp

Try the ConvBolt Unit Converter for any other volume unit, browse the Volume conversions, or read our conversion guides.