Convert Milliliter to Imperial Teaspoon
Convert milliliters to imperial teaspoons instantly. 1 milliliter = 0.1689363827 imperial teaspoon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Imperial Teaspoon to Milliliter converter for the reverse conversion.
Units explained
Milliliter
A milliliter is one thousandth of a liter, exactly equal to one cubic centimeter.
Formed with the SI prefix milli- applied to the liter.
The standard small-volume unit in cooking, medicine and the laboratory.
Metric prefix system.
Imperial Teaspoon
An imperial teaspoon is about 5.9194 mL, one third of an imperial tablespoon.
A British cooking measure.
Older UK recipes.
UK cooking measure.
Milliliter to Imperial Teaspoon conversion formula
The relationship between milliliters and imperial teaspoons:
To convert milliliters to imperial teaspoons, multiply the value in milliliters by 0.1689363827. To reverse, multiply imperial teaspoons by 5.9193880208.
How to use this converter
Type a value into the calculator. The result in imperial teaspoons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Imperial Teaspoon to Milliliter converter for the reverse direction.
Step-by-step: convert milliliters to imperial teaspoons
- Write down the value in milliliters (mL).
- Multiply that value by the factor 0.1689363827.
- The product is the equivalent value in imperial teaspoons (tsp).
- To reverse, multiply the imperial teaspoon value by 5.9193880208.
Worked examples
Example 1 — Convert 1 mL to tsp:
1 × 0.1689363827 = 0.1689363827 tsp
Example 2 — Convert 100 mL to tsp:
100 × 0.1689363827 = 16.8936382694 tsp
Real-world example — Hair-width scale measurements
A 70-milliliter measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like imperial teaspoons for direct comparison across supplier datasheets.
70 mL × 0.1689363827 = 11.8255467886 tsp
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 milliliters), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 mL × 0.1689363827 = 0.5068091481 tsp
Real-world example — Plastic-film thickness alternates
A 150-milliliter plastic film converts cleanly to imperial teaspoons — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 mL × 0.1689363827 = 25.3404574041 tsp
Milliliter to Imperial Teaspoon conversion table
Standard reference values for converting milliliters to imperial teaspoons:
| Milliliter [mL] | Imperial Teaspoon [tsp] |
|---|---|
| 0.01 | 0.0016893638 |
| 0.1 | 0.0168936383 |
| 1 | 0.1689363827 |
| 2 | 0.3378727654 |
| 3 | 0.5068091481 |
| 4 | 0.6757455308 |
| 5 | 0.8446819135 |
| 10 | 1.6893638269 |
| 20 | 3.3787276539 |
| 30 | 5.0680914808 |
| 40 | 6.7574553077 |
| 50 | 8.4468191347 |
| 100 | 16.8936382694 |
| 500 | 84.4681913469 |
| 1000 | 168.9363826937 |
Frequently asked questions
How many imperial teaspoons is 1 milliliter?
How do I convert milliliters to imperial teaspoons?
How do I convert imperial teaspoons back to milliliters?
How many imperial teaspoons is 100 milliliters?
Popular volume unit conversions
Convert Milliliter to other volume units
Show all Milliliter conversions
Metric / SI (13 units)
US Customary (Liquid) (15 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 mL = 0.1689363827 tsp) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.