US Teaspoons to Metric Tablespoons (tsp to tbsp)
1 US teaspoon equals 0.3285947729 metric tablespoons (rounded).
How to convert US teaspoons to metric tablespoons
To convert US teaspoons to metric tablespoons, multiply the number of US teaspoons by 0.3285947729. The factor is rounded to 10 significant digits. To go the other way, multiply metric tablespoons by 3.043262043 (rounded).
metric tablespoons = US teaspoons × 0.3285947729
Example: 10 US teaspoons = 3.285947729 metric tablespoons.
Pints, quarts, gallons and fluid ounces differ between the US and the UK. Units are labeled 'US' or 'imperial' to avoid confusion.
About these units
US Teaspoon (tsp)
One sixth of a US fluid ounce, exactly 4.92892159375 mL. Commonly rounded to 5 mL in recipes.
Teaspoons arrived with tea. Small spoons were common in Europe from at least the 13th century, and the earliest cited mention of a teaspoon is a London Gazette advertisement from 27 December 1686. Britain's Commutation Act of 1784 cut the tea tax from 119 percent to 12.5 percent, tea became cheap, and cups and spoons grew with it. By the 1850s the culinary teaspoon had settled as one third of a tablespoon.
The US teaspoon is one sixth of a US fluid ounce, exactly 4.92892159375 milliliters, though for nutrition labels and medicine it is rounded to 5 mL. Apothecaries once called the small spoon cochleare minus, to distinguish it from the larger cochleare majus. Household spoons are poor measuring tools: one study of 71 kitchen teaspoons found volumes from 2.5 to 7.3 milliliters, which is why dosing instructions point to standard measuring spoons or syringes.
1 US teaspoon = 0.004928921594 liters (approximately).
Sources: Wikipedia: Teaspoon; NIST SP 811, Appendix B.8: conversion factors for volume; 21 CFR 101.9: nutrition labeling household measures
Metric Tablespoon (tbsp)
Exactly 15 mL, used in most countries.
Fifteen milliliters is the working size of the tablespoon in most of the world, and it is a rounded figure. Older customary values were about 14.8 mL for the US and about 14.2 mL for the UK, and modern UK and US measuring spoons are both treated as 15 mL in most contexts. The tablespoon itself dates to the early 1700s, when it first appeared in place settings for soup.
The 15 mL spoon is a staple in recipes everywhere. Three metric teaspoons make a tablespoon, and 16 and two thirds make a 250 mL metric cup. Australia is the notable exception, using a 20 milliliter tablespoon and counting four teaspoons to it, so a recipe from one country can taste off in another. Check which spoon a cook has in mind: scoops of oil, honey or baking powder amount to a third more in Australia.
1 metric tablespoon = 0.015 liters (exactly).
Sources: Wikipedia: Tablespoon; Wikipedia: Metric cup
Related conversions
- Metric tablespoons to US teaspoons (reverse)
- US teaspoons to liters
- US teaspoons to milliliters
- US teaspoons to US gallons
- US teaspoons to US cups
- US teaspoons to US fluid ounces
- US teaspoons to cubic meters
- US teaspoons to cubic centimeters
- US teaspoons to US quarts
- US teaspoons to US pints
- US teaspoons to US tablespoons
- US teaspoons to metric cups
- US teaspoons to metric teaspoons
- Liters to metric tablespoons
- Milliliters to metric tablespoons
- US gallons to metric tablespoons
- US cups to metric tablespoons
- US fluid ounces to metric tablespoons
- Cubic meters to metric tablespoons
- Cubic centimeters to metric tablespoons
- US quarts to metric tablespoons
- US pints to metric tablespoons
- US tablespoons to metric tablespoons
- Metric cups to metric tablespoons
- Metric teaspoons to metric tablespoons
See all volume units.