Convert Metric Tablespoon to Metric Teaspoon
Convert metric tablespoons to metric teaspoons instantly. 1 metric tablespoon = 3 metric teaspoon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Metric Teaspoon to Metric Tablespoon converter for the reverse conversion.
Units explained
Metric Tablespoon
A metric tablespoon is exactly 15 milliliters.
Adopted with metric cooking standards (Australia uses 20 mL).
Standard metric cooking measure for liquids.
Metrication.
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.
Metric Tablespoon to Metric Teaspoon conversion formula
The relationship between metric tablespoons and metric teaspoons:
To convert metric tablespoons to metric teaspoons, multiply the value in metric tablespoons by 3. To reverse, multiply metric teaspoons by 0.3333333333.
How to use this converter
Type a value into the calculator. The result in metric 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 Metric Teaspoon to Metric Tablespoon converter for the reverse direction.
Step-by-step: convert metric tablespoons to metric teaspoons
- Write down the value in metric tablespoons (tbsp).
- Multiply that value by the factor 3.
- The product is the equivalent value in metric teaspoons (tsp).
- To reverse, multiply the metric teaspoon value by 0.3333333333.
Worked examples
Example 1 — Convert 1 tbsp to tsp:
1 × 3 = 3 tsp
Example 2 — Convert 100 tbsp to tsp:
100 × 3 = 300 tsp
Real-world example — Plastic-film thickness alternates
A 150-metric tablespoon plastic film converts cleanly to metric teaspoons — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 tbsp × 3 = 450 tsp
Real-world example — Hair-width scale measurements
A 70-metric tablespoon measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like metric teaspoons for direct comparison across supplier datasheets.
70 tbsp × 3 = 210 tsp
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 metric tablespoons), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 tbsp × 3 = 9 tsp
Metric Tablespoon to Metric Teaspoon conversion table
Standard reference values for converting metric tablespoons to metric teaspoons:
| Metric Tablespoon [tbsp] | Metric Teaspoon [tsp] |
|---|---|
| 0.01 | 0.03 |
| 0.1 | 0.3 |
| 1 | 3 |
| 2 | 6 |
| 3 | 9 |
| 4 | 12 |
| 5 | 15 |
| 10 | 30 |
| 20 | 60 |
| 30 | 90 |
| 40 | 120 |
| 50 | 150 |
| 100 | 300 |
| 500 | 1500 |
| 1000 | 3000 |
Frequently asked questions
How many metric teaspoons is 1 metric tablespoon?
How do I convert metric tablespoons to metric teaspoons?
How do I convert metric teaspoons back to metric tablespoons?
How many metric teaspoons is 100 metric tablespoons?
Popular volume unit conversions
Convert Metric Tablespoon to other volume units
Show all Metric Tablespoon 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 tbsp = 3 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 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.