Convert US Teaspoon to Metric Cup
Convert us teaspoons to metric cups instantly. 1 us teaspoon = 0.0197156864 metric cup — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Metric Cup to US Teaspoon converter for the reverse conversion.
Units explained
US Teaspoon
A US teaspoon is one third of a US tablespoon (4.9289 mL).
A standardized small cooking measure.
Used everywhere in US recipes and home dosing.
US cooking measure.
Metric Cup
A metric cup is exactly 250 milliliters.
Adopted with metrication in Australia, New Zealand and other countries.
Standard cooking cup in metric-recipe countries.
Metrication, 20th c.
US Teaspoon to Metric Cup conversion formula
The relationship between us teaspoons and metric cups:
To convert us teaspoons to metric cups, multiply the value in us teaspoons by 0.0197156864. To reverse, multiply metric cups by 50.7210340528.
How to use this converter
Type a value into the calculator. The result in metric 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 Metric Cup to US Teaspoon converter for the reverse direction.
Step-by-step: convert us teaspoons to metric cups
- Write down the value in us teaspoons (tsp).
- Multiply that value by the factor 0.0197156864.
- The product is the equivalent value in metric cups (cup).
- To reverse, multiply the metric cup value by 50.7210340528.
Worked examples
Example 1 — Convert 1 tsp to cup:
1 × 0.0197156864 = 0.0197156864 cup
Example 2 — Convert 100 tsp to cup:
100 × 0.0197156864 = 1.9715686375 cup
Real-world example — Plastic-film thickness alternates
A 150-us teaspoon plastic film converts cleanly to metric cups — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 tsp × 0.0197156864 = 2.9573529562 cup
Real-world example — Hair-width scale measurements
A 70-us teaspoon measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like metric cups for direct comparison across supplier datasheets.
70 tsp × 0.0197156864 = 1.3800980462 cup
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 us teaspoons), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 tsp × 0.0197156864 = 0.0591470591 cup
US Teaspoon to Metric Cup conversion table
Standard reference values for converting us teaspoons to metric cups:
| US Teaspoon [tsp] | Metric Cup [cup] |
|---|---|
| 0.01 | 0.0001971569 |
| 0.1 | 0.0019715686 |
| 1 | 0.0197156864 |
| 2 | 0.0394313727 |
| 3 | 0.0591470591 |
| 4 | 0.0788627455 |
| 5 | 0.0985784319 |
| 10 | 0.1971568637 |
| 20 | 0.3943137275 |
| 30 | 0.5914705913 |
| 40 | 0.788627455 |
| 50 | 0.9857843187 |
| 100 | 1.9715686375 |
| 500 | 9.8578431875 |
| 1000 | 19.715686375 |
Frequently asked questions
How many metric cups is 1 us teaspoon?
How do I convert us teaspoons to metric cups?
How do I convert metric cups back to us teaspoons?
How many metric cups is 100 us teaspoons?
Popular volume unit conversions
Convert US Teaspoon to other volume units
Show all US Teaspoon conversions
Metric / SI (8 units)
US Customary (Liquid) (7 units)
Imperial (UK) (4 units)
Cubic (length-derived) (3 units)
Cooking / Culinary (3 units)
Sources & references
Conversion factor (1 tsp = 0.0197156864 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.