Convert Metric Teaspoon to US Cup
Convert metric teaspoons to us cups instantly. 1 metric teaspoon = 0.0211337642 us cup — use the live calculator, the exact formula, a conversion table and worked examples. Also check the US Cup to Metric Teaspoon converter for the reverse conversion.
Units explained
Metric Teaspoon
A metric teaspoon is exactly 5 milliliters.
Adopted as the standard metric small cooking measure.
Universal in metric recipes and liquid medicine dosing.
Metrication.
US Cup
A US customary cup is one sixteenth of a US gallon (236.588 mL).
Standardized for American cooking; distinct from the 240 mL US legal cup and the 250 mL metric cup.
The standard US cooking-volume unit in recipes.
US customary cooking measure.
Metric Teaspoon to US Cup conversion formula
The relationship between metric teaspoons and us cups:
To convert metric teaspoons to us cups, multiply the value in metric teaspoons by 0.0211337642. To reverse, multiply us cups by 47.3176473.
How to use this converter
Type a value into the calculator. The result in us cups updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the US Cup to Metric Teaspoon converter for the reverse direction.
Step-by-step: convert metric teaspoons to us cups
- Write down the value in metric teaspoons (tsp).
- Multiply that value by the factor 0.0211337642.
- The product is the equivalent value in us cups (cup).
- To reverse, multiply the us cup value by 47.3176473.
Worked examples
Example 1 — Convert 1 tsp to cup:
1 × 0.0211337642 = 0.0211337642 cup
Example 2 — Convert 100 tsp to cup:
100 × 0.0211337642 = 2.1133764189 cup
Real-world example — Plastic-film thickness alternates
A 150-metric teaspoon plastic film converts cleanly to us cups — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 tsp × 0.0211337642 = 3.1700646283 cup
Real-world example — Hair-width scale measurements
A 70-metric teaspoon measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like us cups for direct comparison across supplier datasheets.
70 tsp × 0.0211337642 = 1.4793634932 cup
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 metric teaspoons), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 tsp × 0.0211337642 = 0.0634012926 cup
Metric Teaspoon to US Cup conversion table
Standard reference values for converting metric teaspoons to us cups:
| Metric Teaspoon [tsp] | US Cup [cup] |
|---|---|
| 0.01 | 0.0002113376 |
| 0.1 | 0.0021133764 |
| 1 | 0.0211337642 |
| 2 | 0.0422675284 |
| 3 | 0.0634012926 |
| 4 | 0.0845350568 |
| 5 | 0.1056688209 |
| 10 | 0.2113376419 |
| 20 | 0.4226752838 |
| 30 | 0.6340129257 |
| 40 | 0.8453505675 |
| 50 | 1.0566882094 |
| 100 | 2.1133764189 |
| 500 | 10.5668820943 |
| 1000 | 21.1337641887 |
Frequently asked questions
How many us cups is 1 metric teaspoon?
How do I convert metric teaspoons to us cups?
How do I convert us cups back to metric teaspoons?
How many us cups is 100 metric teaspoons?
Popular volume unit conversions
Convert Metric Teaspoon to other volume units
Show all Metric Teaspoon conversions
Metric / SI (8 units)
US Customary (Liquid) (8 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (2 units)
Sources & references
Conversion factor (1 tsp = 0.0211337642 cup) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.