Gr To Tsp Converter
Convert grains (gr) to US teaspoons (tsp) instantly with this free mass-to-volume converter. One grain equals 0.01315 teaspoons for water-equivalent density — ideal for cooking, baking, and apothecary.
About This Calculator
The Grains to Teaspoons Converter (Gr to Tsp Converter) is a free online tool that instantly converts mass measured in grains (gr) to volume measured in US teaspoons (tsp). Whether you are working with apothecary measurements, cooking small batches, handling black powder or ammunition reloading, or working in a scientific lab, this converter gives you accurate results based on the standard conversion factor of 1 grain = 0.0131494 US teaspoons.
The grain is an ancient unit of mass that originated from the weight of a single grain of barley. Today it is still widely used in three contexts: ammunition and firearm reloading (bullet and powder weights), apothecary and pharmaceutical measurements, and archery (arrow shaft weights). The conversion to volume is based on the density of water at 1 g/mL, so for substances with significantly different densities — such as flour, salt, baking powder, or spices — the teaspoon equivalent will vary.
The US teaspoon (tsp) is the standard volume measure in American cooking and baking, equal to 1/3 of a tablespoon or about 4.92892 mL. Note that the UK (imperial) teaspoon is slightly larger at approximately 5.91939 mL, so results will differ for UK recipes. This converter uses the US teaspoon standard (US tsp) which is the most common worldwide for recipe measurements.
Conversion Formula
1 grain (gr) = 0.0131494 US teaspoons (tsp)
Teaspoons = Grains × 0.0131494
For example, to convert 10 grains to teaspoons: 10 × 0.0131494 = 0.131494 tsp. To convert 100 grains: 100 × 0.0131494 = 1.31494 teaspoons.
Frequently Asked Questions
How does the Gr To Tsp Converter work?
The converter uses a fixed conversion factor of 1 grain (gr) = 0.0131494 US teaspoons (tsp), which is based on the density of water. Enter your value in grains and the tool instantly calculates the equivalent volume in teaspoons.
Is the Gr to Tsp conversion accurate for all substances?
The conversion factor 1 gr = 0.0131494 tsp assumes water-equivalent density (1 g/mL). For substances with different densities such as flour, sugar, salt, or spices, the actual volume in teaspoons will differ. This converter is most accurate for water, water-based liquids, and substances with density close to 1 g/mL.
Is this tool free?
Yes, all calculators on Calculy are completely free to use. There are no hidden fees, subscriptions, or usage limits.
What is a grain in measurement?
A grain (gr) is a unit of mass in the avoirdupois, troy, and apothecaries systems. One grain equals exactly 64.79891 milligrams or 0.06479891 grams. It was historically based on the weight of a single grain of barley. Grains are still used today for measuring ammunition, arrows, and in apothecary.
What is a US teaspoon?
A US teaspoon (tsp) is a unit of volume equal to 1/6 of a US fluid ounce, 1/3 of a US tablespoon, or approximately 4.92892 milliliters. It is the standard teaspoon measure used in US cooking and baking recipes.
What is the difference between US and UK teaspoons?
A US teaspoon equals approximately 4.92892 mL, while a UK (imperial) teaspoon equals approximately 5.91939 mL. This converter uses the US teaspoon standard. The UK teaspoon is about 20% larger, so conversion results will differ if the imperial teaspoon is used.
Can I convert teaspoons back to grains?
Yes, to convert teaspoons back to grains, multiply the number of teaspoons by 76.05 (the inverse of 0.0131494). For example, 1 tsp × 76.05 = 76.05 grains. You can also use the input field with the reverse calculation.