How to Convert Teaspoons to US gallons (tsp to gal)
Volume conversions help with baking from American recipes, comparing petrol prices quoted per gallon abroad with pump prices per litre here, and reading PUB water bills in cubic metres. This guide shows how to convert teaspoons into us gallons by hand, with examples and a quick-reference table.
The conversion
To convert teaspoons to us gallons, multiply the value by 0.0013020835. To go the other way, divide by the same number (or multiply by 767.9998863848). For a quick estimate, multiply by about 0.0013.
US gallons = teaspoons × 0.0013020835
Worked examples
- 3 tsp = 0.003906 gal
- 12.5 tsp = 0.016276 gal
- 75 tsp = 0.097656 gal
Teaspoons to US gallons table
| Teaspoons | US gallons |
|---|---|
| 1 tsp | 0.001302 gal |
| 2 tsp | 0.002604 gal |
| 5 tsp | 0.00651 gal |
| 10 tsp | 0.013021 gal |
| 20 tsp | 0.026042 gal |
| 25 tsp | 0.032552 gal |
| 50 tsp | 0.065104 gal |
| 100 tsp | 0.130208 gal |
| 250 tsp | 0.325521 gal |
| 500 tsp | 0.651042 gal |
| 1,000 tsp | 1.3021 gal |
Common questions
Is tsp to gal exact?
The factors used here are the internationally defined values where they exist; results are rounded for display only.
How do I convert back?
Use the US gallons to Teaspoons converter.
Mistakes to avoid
Mixing similar-sounding units
US and imperial gallons, pints and tons are different sizes, and decimal kilobytes differ from binary kibibytes.
Forgetting squared and cubed units
Area and volume factors are the length factor squared or cubed, so 1 m² is about 10.76 sq ft, not 3.28.
Multiplying when you should divide
Converting to a smaller unit gives a bigger number, and converting to a larger unit gives a smaller one. If your answer moves the wrong way, you have inverted the factor.
Background
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
For everyday use, three or four significant figures are usually enough. Engineering, science and trade documents may need more, and rounding should happen only at the end of a calculation.
A conversion table is handy for common values, but a calculator is faster and avoids interpolation errors for anything in between.
For any value, use the Teaspoons to US gallons Converter or browse all volume converters.
Run your own numbers: Teaspoons to US gallons Converter