ML to Teaspoons Converter
Enter a Value to Convert
Type a milliliter or teaspoon value above to see the instant conversion result, fraction approximation, and comparison across all three teaspoon standards.
How to Use the ML to Teaspoons Converter
Choose Your Use Case
Select Cooking or Medicine/Dosing at the top. This changes which preset buttons appear below. For medicine, a safety warning will also appear reminding you to use a calibrated measuring device instead of a household spoon.
Select Your Teaspoon Standard
Pick US Customary (4.929 mL — for US recipes and nutrition labels), Metric (5 mL — for medicine and international recipes), or Imperial/UK (5.919 mL — for British and Commonwealth recipes). The converter shows all three standards simultaneously in the dual-standard section.
Enter Your Value
Type a milliliter value in the mL field to convert to teaspoons, or type a teaspoon value in the tsp field to convert to milliliters. The conversion happens instantly as you type. Use the arrow button in the middle to swap the direction and carry the computed value over.
Read Your Results
The main result shows the converted value plus the nearest kitchen fraction for easy measuring. The dual-standard chart compares all three teaspoon definitions side by side. Use the Export CSV button to download a reference table, or Print to save the results for your kitchen.
Frequently Asked Questions
How many teaspoons are in 5 mL?
Exactly 1 metric teaspoon. The metric teaspoon is defined as precisely 5 milliliters, so 5 mL = 1 tsp with zero rounding error. This is the standard used on medicine dosing cups, oral syringes, and nutrition facts labels worldwide. In US Customary terms, 5 mL equals approximately 1.0144 teaspoons, since the US teaspoon is defined as 4.92892 mL — very close to 5 mL but not exactly. For cooking purposes the difference is negligible; for pharmaceutical dosing, the metric 5 mL standard is always used.
Is 1 teaspoon exactly 5 mL?
It depends on which teaspoon standard you use. The Metric teaspoon used in medicine and international nutrition labeling is defined as exactly 5 mL. However, the US Customary teaspoon — used in American recipes and measuring spoon sets — is defined as 4.92892159375 mL, about 1.4% less than 5 mL. The Imperial/UK teaspoon is approximately 5.919 mL, about 18.4% more than 5 mL. For everyday cooking the difference rarely matters, but for precision baking or medication dosing, you should know which standard applies to your situation.
How many mL is a teaspoon of medicine?
A medical teaspoon is exactly 5 mL. All pharmaceutical dosing instructions, oral syringe calibrations, and dosing cup markings in the US and internationally use the metric teaspoon of 5 mL. The FDA and WHO both explicitly recommend that liquid medications be measured using a calibrated oral syringe or dosing cup, not a kitchen teaspoon. Household teaspoons have been measured in studies to vary between 3 mL and 7 mL depending on the spoon's size and shape, making them unsafe for drug dosing. Common pediatric doses: 2.5 mL = 1/2 tsp, 5 mL = 1 tsp, 7.5 mL = 1.5 tsp, 10 mL = 2 tsp.
Why are there three different teaspoon sizes?
The three teaspoon standards evolved from different historical measurement traditions in the US, UK, and international metrication. The US Customary teaspoon (4.929 mL) is derived from the US fluid ounce system and was codified by NIST as exactly 1/6 fluid ounce. The Imperial teaspoon (5.919 mL) comes from the British Imperial system and is 1/3 of a British tablespoon. The Metric teaspoon (5 mL) was adopted by international bodies for medicine and nutrition labeling because its value is a round number of milliliters, making it easier to work with in metric countries. Today all three coexist in different contexts.
How do I convert mL to teaspoons for a recipe?
For most US recipes, divide the milliliter amount by 4.929 to get US teaspoons. Quick reference: 2.5 mL ≈ 1/2 tsp, 5 mL ≈ 1 tsp, 7.5 mL ≈ 1.5 tsp, 10 mL ≈ 2 tsp, 15 mL ≈ 3 tsp (1 tablespoon). For UK or Commonwealth recipes, divide by 5.919 instead. For recipes labeled with nutrition facts (using metric teaspoon), divide by 5 exactly. Our converter does this math automatically and also shows the nearest kitchen fraction so you can grab the right measuring spoon without additional calculations.
What is the fraction display and how is it calculated?
The fraction display shows the nearest practical measuring spoon increment for your converted teaspoon result. Standard measuring spoon sets come in increments of 1/8 teaspoon: 1/8, 1/4, 1/2, 3/4, and 1 teaspoon are the most common spoons. Our converter takes your decimal teaspoon result and rounds it to the nearest 1/8 tsp value, then displays it as a readable kitchen fraction like '1/2 tsp' or '1-3/4 tsp'. This avoids the impractical result of '0.507 tsp' and tells you to use 'about 1/2 tsp' instead — which is all the precision a measuring spoon can actually deliver.