How many tablespoons are in a gallon?

256 US tablespoons in one US gallon. The halves stay exact because every factor in the chain is a power of two: half a gallon is 128 tbsp, a quarter gallon is 64 tbsp, and 2 gallons is 512 tbsp. Press the swap button between the boxes to work in that direction, with Gallon (US) in the From box and Tablespoon (US) in the To box.

What is the formula for tablespoons to gallons?

gallons = tablespoons / 256, and tablespoons = gallons x 256. So 1 tbsp is 0.00390625 gal, 2 tbsp is 0.0078125 gal and 32 tbsp is 0.125 gal. The page divides through litres rather than through the customary chain, which is why the answers come back exact rather than as a drifting decimal.

Which tablespoon does this use?

The US tablespoon, listed as Tablespoon (US) and equal to exactly half a US fluid ounce, which the page prints as 14.7867647812 mL and 3 US teaspoons. It is not the metric tablespoon of 15 mL used by most modern British and European recipes, and not the Australian tablespoon of 20 mL. Those two are not in the unit list, so convert them through Millilitre instead: pick Millilitre in the From box, type 15 or 20, and read the gallons row.

Which gallon does this use?

The US liquid gallon of 3.785411784 litres, listed as Gallon (US). The imperial gallon of 4.54609 litres is a separate row behind the Show 5 more switch, and it is about 20 percent larger, so the same 256 tablespoons that fill a US gallon come to 0.832674184629 imperial gallons, and a single tablespoon is 0.00325263353371 of one. Going the other way, 1 imperial gallon holds 307.443180929 US tablespoons.

Worked example: how many gallons is 100 tablespoons?

0.390625 gallons. Type 100 into the From box and the list underneath restates it as 300 teaspoons, 50 fluid ounces, 6.25 cups, 3.125 pints, 1.5625 quarts, 1,478.67647812 mL and 1.47867647812 L. Each row carries its own Copy button, and Copy result above the list copies the headline figure without the thousands separators it is displayed with.

Why is the factor 256 and not something rounder?

Because the US customary chain doubles four times and multiplies by 8 once: 2 tablespoons to the fluid ounce, 8 fluid ounces to the cup, 2 cups to the pint, 2 pints to the quart and 4 quarts to the gallon. That is 2 x 8 x 2 x 2 x 4 = 256, and the page shows every link of it in the list, where 1 gallon appears as 128 fluid ounces, 16 cups, 8 pints and 4 quarts.

How many tablespoons are in a cup or a quart?

16 tablespoons to a US cup and 64 to a US quart, which the page reports from the other side as 1 tbsp being 0.0625 cup and 0.015625 qt. Those two rows are always visible in the list, so scaling a batch up to a gallon does not mean converting twice: type the tablespoons the recipe calls for and read the row you need.

Is this liquid measure or dry measure?

Liquid. Every volume unit on the page is a fluid measure, and the US dry gallon and dry pint are not in the list. A tablespoon of a dry ingredient is also a volume rather than a weight, so it converts here but will not tell you what it weighs: flour and sugar differ by ingredient and by how the spoon was filled.

Tablespoons to Gallons Converter

It takes 256 US tablespoons to fill a US gallon, so tablespoons to gallons is a division by 256 and every clean fraction lands exactly: 128 tbsp is 0.5 gal, 64 tbsp is 0.25 gal and 16 tbsp is 0.0625 gal. This page opens with Tablespoon (US) in the From box and Gallon (US) in the To box, ahead of whatever pair the converter last remembered. Both units are the US ones and the page says so in the menus, because the tablespoon is the unit converters most often leave unlabelled: the one here is exactly half a US fluid ounce, which this page prints as 14.7867647812 mL, not the 15 mL metric spoon and not the 20 mL Australian one. Under the headline the same volume appears in teaspoons, fluid ounces, cups, pints, quarts, millilitres and litres at once, so 100 tbsp reads 0.390625 gal, 300 tsp, 50 fl oz, 6.25 cups and 1,478.67647812 mL together. A Show 5 more switch adds the imperial fluid ounce, pint and gallon plus cubic inches and cubic feet when the recipe is British.

From

To0.00390625

1 tbsp in every volume unit

MillilitremL
14.7867647812
LitreL
0.0147867647812
Cubic metrem³
0.0000147867647812
Teaspoon (US)tsp
3
Fluid ounce (US)fl oz
0.5
Cup (US)cup
0.0625
Pint (US)pt
0.03125
Quart (US)qt
0.015625
Gallon (US)gal
0.00390625

Common questions

How many tablespoons are in a gallon?: 256 US tablespoons in one US gallon. The halves stay exact because every factor in the chain is a power of two: half a gallon is 128 tbsp, a quarter gallon is 64 tbsp, and 2 gallons is 512 tbsp. Press the swap button between the boxes to work in that direction, with Gallon (US) in the From box and Tablespoon (US) in the To box.
What is the formula for tablespoons to gallons?: gallons = tablespoons / 256, and tablespoons = gallons x 256. So 1 tbsp is 0.00390625 gal, 2 tbsp is 0.0078125 gal and 32 tbsp is 0.125 gal. The page divides through litres rather than through the customary chain, which is why the answers come back exact rather than as a drifting decimal.
Which tablespoon does this use?: The US tablespoon, listed as Tablespoon (US) and equal to exactly half a US fluid ounce, which the page prints as 14.7867647812 mL and 3 US teaspoons. It is not the metric tablespoon of 15 mL used by most modern British and European recipes, and not the Australian tablespoon of 20 mL. Those two are not in the unit list, so convert them through Millilitre instead: pick Millilitre in the From box, type 15 or 20, and read the gallons row.
Which gallon does this use?: The US liquid gallon of 3.785411784 litres, listed as Gallon (US). The imperial gallon of 4.54609 litres is a separate row behind the Show 5 more switch, and it is about 20 percent larger, so the same 256 tablespoons that fill a US gallon come to 0.832674184629 imperial gallons, and a single tablespoon is 0.00325263353371 of one. Going the other way, 1 imperial gallon holds 307.443180929 US tablespoons.
Worked example: how many gallons is 100 tablespoons?: 0.390625 gallons. Type 100 into the From box and the list underneath restates it as 300 teaspoons, 50 fluid ounces, 6.25 cups, 3.125 pints, 1.5625 quarts, 1,478.67647812 mL and 1.47867647812 L. Each row carries its own Copy button, and Copy result above the list copies the headline figure without the thousands separators it is displayed with.
Why is the factor 256 and not something rounder?: Because the US customary chain doubles four times and multiplies by 8 once: 2 tablespoons to the fluid ounce, 8 fluid ounces to the cup, 2 cups to the pint, 2 pints to the quart and 4 quarts to the gallon. That is 2 x 8 x 2 x 2 x 4 = 256, and the page shows every link of it in the list, where 1 gallon appears as 128 fluid ounces, 16 cups, 8 pints and 4 quarts.
How many tablespoons are in a cup or a quart?: 16 tablespoons to a US cup and 64 to a US quart, which the page reports from the other side as 1 tbsp being 0.0625 cup and 0.015625 qt. Those two rows are always visible in the list, so scaling a batch up to a gallon does not mean converting twice: type the tablespoons the recipe calls for and read the row you need.
Is this liquid measure or dry measure?: Liquid. Every volume unit on the page is a fluid measure, and the US dry gallon and dry pint are not in the list. A tablespoon of a dry ingredient is also a volume rather than a weight, so it converts here but will not tell you what it weighs: flour and sugar differ by ingredient and by how the spoon was filled.

Conversion factors are the exact legal definitions where one exists. An inch is exactly 2.54 cm and a pound exactly 0.45359237 kg, so those conversions are exact rather than approximate. Temperature uses offsets rather than factors, and that is shown in the working.