US Gallons to Metric Teaspoons (gal to tsp)
1 US gallon equals 757.0823568 metric teaspoons exactly.
How to convert US gallons to metric teaspoons
To convert US gallons to metric teaspoons, multiply the number of US gallons by 757.0823568. This factor is exact. To go the other way, multiply metric teaspoons by 0.001320860262 (rounded).
metric teaspoons = US gallons × 757.0823568
Example: 10 US gallons = 7,570.823568 metric teaspoons.
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 Gallon (gal)
Exactly 231 cubic inches or 3.785411784 liters (128 US fluid ounces). About 17% smaller than the imperial gallon.
The US gallon is a survivor of English wine trade. Around 1706, a statute in Queen Anne's reign fixed the wine gallon at exactly 231 cubic inches, settling confusion among the competing gallons for wine, ale and corn. British colonies in North America used that wine gallon, and in 1824 Britain replaced all its gallons with a new imperial one while the United States kept the old measure. It was adopted as the legal US standard in 1836 and is still defined as exactly 231 cubic inches, or 3.785411784 liters.
That makes the US gallon about 17 percent smaller than the imperial gallon, a difference that explains why American and British fuel-economy figures cannot be compared directly. Everyday uses are milk jugs, paint cans and gasoline pumps. One gallon divides evenly into four quarts, eight pints, sixteen cups and 128 fluid ounces. A gallon of water weighs a little over 8 pounds, an easy figure to remember when loading a car with water jugs.
1 US gallon = 3.785411784 liters (exactly).
Sources: Wikipedia: Gallon; NIST SP 811, Appendix B.8: conversion factors for volume
Metric Teaspoon (tsp)
Exactly 5 mL, used in most countries.
Five milliliters is the metric teaspoon, a figure so tidy that it has become the working definition for medicine and food labels. The traditional British teaspoon was an imperial fluid drachm, one eighth of an imperial fluid ounce, about 3.55 milliliters, and the American one was 4.93 mL. US nutrition labeling law now defines a teaspoon as exactly 5 milliliters.
The 5 mL teaspoon matters most when dosing medicine. Kitchen spoons vary widely, with one Greek survey of 71 household teaspoons finding volumes from 2.5 to 7.3 mL, so measuring spoons, syringes and calibrated cups are the safer tools. It also anchors the metric cooking system: three teaspoons make a 15 mL tablespoon, and fifty fit in a 250 mL metric cup. Australia keeps a 5 mL teaspoon but counts four of them in its larger 20 mL tablespoon.
1 metric teaspoon = 0.005 liters (exactly).
Sources: Wikipedia: Teaspoon; 21 CFR 101.9: nutrition labeling household measures; Wikipedia: Metric cup
Related conversions
- Metric teaspoons to US gallons (reverse)
- US gallons to liters
- US gallons to milliliters
- US gallons to US cups
- US gallons to US fluid ounces
- US gallons to cubic meters
- US gallons to cubic centimeters
- US gallons to US quarts
- US gallons to US pints
- US gallons to US tablespoons
- US gallons to US teaspoons
- US gallons to metric cups
- US gallons to metric tablespoons
- Liters to metric teaspoons
- Milliliters to metric teaspoons
- US cups to metric teaspoons
- US fluid ounces to metric teaspoons
- Cubic meters to metric teaspoons
- Cubic centimeters to metric teaspoons
- US quarts to metric teaspoons
- US pints to metric teaspoons
- US tablespoons to metric teaspoons
- US teaspoons to metric teaspoons
- Metric cups to metric teaspoons
- Metric tablespoons to metric teaspoons
See all volume units.