ML to Teaspoons Converter

How to Use This Tool

One teaspoon equals 4.93 mL. Divide milliliters by 4.93 to get teaspoons. Multiply teaspoons by 4.93 to get milliliters.

7.5 mL works out to 1.5 tsp. 2.5 mL works out to half a teaspoon.

This page is built for the quick lookup. For the full explanation of where 4.93 comes from, see the companion guide on how many mL are in a teaspoon.

Formula both directions

• mL to teaspoons: tsp = mL ÷ 4.93
• Teaspoons to mL: mL = tsp × 4.93
• Rounded-for-cooking version: most measuring spoons and drug-dosing labels use 5 mL per teaspoon instead of 4.93. That gap almost never matters at kitchen or dosing scale.

Reference table: mL to teaspoons

Reference table: teaspoons to mL

Why 4.93 and not 5

The precise US teaspoon measures 4.92892 mL. That figure comes from the US gallon and fluid ounce system, not from a metric starting point.

Nutrition labels, medicine droppers, and most recipe charts round it to 5 mL. The 1.4% gap stays invisible in cooking and low-stakes dosing.

This converter keeps the fuller 4.93 mL figure so the math stays accurate when precision matters. For a liquid medication, that 0.07 mL per teaspoon can add up over multiple doses.

Take a child on four 2-teaspoon doses a day. Rounding each dose to 5 mL instead of 4.93 mL adds up to 0.56 mL of extra liquid across the day. That’s small, but it shows why pharmacists still work from the precise figure.

Worked examples

7.5 mL of cough syrup: 7.5 ÷ 4.93 = 1.52 tsp. That’s why many dosing cups mark “1.5 tsp” right at the 7.5 mL line.

2.5 mL dose: 2.5 ÷ 4.93 = 0.51 tsp, essentially half a teaspoon. That’s the standard “child’s dose” line on many liquid medicine syringes.

1 teaspoon of vanilla extract: 1 × 4.93 = 4.93 mL. A kitchen scale or graduated dropper usually just rounds this to 5 mL on the display.

The mistake that trips people up

The single most common error here isn’t the math — it’s the abbreviation. “Tsp” and “tbsp” look almost identical on a recipe or dosing label.

But a tablespoon holds 3 times as much as a teaspoon: 14.79 mL against 4.93 mL. Using a tablespoon instead of a teaspoon for medicine dosing means giving triple the intended amount. That’s a real, common household dosing error, not a hypothetical one. Always check for the extra “b” before measuring.

A second, smaller mistake: assuming a spoon from the kitchen drawer is a real teaspoon. Standard flatware teaspoons vary widely in actual volume — some hold closer to 3 mL, others closer to 7 mL.

For anything where precision matters, reach for a marked measuring spoon or oral syringe instead. It reads much closer to the true 4.93 mL than a dinner spoon does.

Where these searches come from

These lookups skew heavily toward medicine dosing rather than cooking. “7.5 ml to tsp,” “2.5 ml to tsp,” and “1/2 teaspoon to ml” are exactly the fractional amounts printed on children’s liquid medicine labels. Dosing syringes use these same numbers.

The label lists mL, but the parent or caregiver thinks in teaspoons. That’s also why precision matters more here than in a typical cooking conversion. A dosing error compounds if it repeats across several doses a day.

Cooking searches like “1 tsp to ml” and “1 teaspoon to ml” tend to come from the opposite direction. Someone is adapting a metric recipe into teaspoon measures for a US kitchen. Or they’re double-checking a baking ratio, where a teaspoon of baking soda needs precise scaling rather than eyeballing.

Frequently Asked Questions

How many mL is 1 teaspoon?
One teaspoon equals 4.93 mL exactly, or 5 mL using the common cooking and dosing rounding.

How many teaspoons is 7.5 mL?
7.5 ÷ 4.93 = 1.52 teaspoons, usually written as 1.5 tsp on dosing instructions.

Is 1/2 teaspoon the same as 2.5 mL?
Yes, essentially. Half a teaspoon is 2.47 mL exactly, close enough that most medicine labels list it as 2.5 mL.

What is 2.5 mL in teaspoons, going the other way?
2.5 mL ÷ 4.93 = 0.51 tsp, right at the half-teaspoon mark.

Why do some charts say 1 tsp = 5 mL instead of 4.93 mL?
Because 5 mL is the rounded figure used across most nutrition labels, medicine cups, and recipes. The exact 4.93 mL figure only matters for precise lab or pharmaceutical measuring.

How do I measure mL without a metric measuring spoon?
Use a marked oral syringe or dosing cup — most show both mL and tsp lines. Or convert using tsp = mL ÷ 4.93 and pick the closest fraction on a standard measuring spoon set.