US Teaspoons to Metric Cups (tsp to cup)
1 US teaspoon equals 0.01971568638 metric cups (rounded).
How to convert US teaspoons to metric cups
To convert US teaspoons to metric cups, multiply the number of US teaspoons by 0.01971568638. The factor is rounded to 10 significant digits. To go the other way, multiply metric cups by 50.72103405 (rounded).
metric cups = US teaspoons × 0.01971568638
Example: 10 US teaspoons = 0.1971568638 metric cups.
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 Cup (cup)
Exactly 250 mL. The cup used in Australia, New Zealand and most Commonwealth recipes.
A metric cup is a cup tamed by decimal thinking. Australia, Canada, New Zealand and some other former British colonies that metricated use a round 250 milliliters, exactly a quarter of a liter. Canada's older cup had been eight imperial fluid ounces, about 227.3 mL, so the metric version is noticeably larger, and Canadian recipes now usually use the 250 mL cup.
The metric cup is not an SI unit, only a practical convention, and it differs from the US cups in useful ways. It is about 6 percent larger than the US customary cup at 236.6 mL and about 4 percent larger than the 240 mL US label cup. Its arithmetic is simple: four cups make a liter, and a cup holds 50 metric teaspoons or 16 and two thirds tablespoons of 15 mL. Many recipes outside the US skip cups entirely and give dry ingredients in grams, because volume is a rough proxy for flour.
1 metric cup = 0.25 liters (exactly).
Sources: Wikipedia: Metric cup; Wikipedia: Cup (unit)
Related conversions
- Metric cups 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 tablespoons
- US teaspoons to metric teaspoons
- Liters to metric cups
- Milliliters to metric cups
- US gallons to metric cups
- US cups to metric cups
- US fluid ounces to metric cups
- Cubic meters to metric cups
- Cubic centimeters to metric cups
- US quarts to metric cups
- US pints to metric cups
- US tablespoons to metric cups
- Metric tablespoons to metric cups
- Metric teaspoons to metric cups
See all volume units.