Convert Teaspoon (US) to US gallons
Americas · Cooking Measures · active · modern
Conventional value The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact.
1 Teaspoon (US) = 0.00130208 US gallons
US gallons = Teaspoon (US) × 0.0013020829
Convert any amount
Teaspoon (US) to US gallons table
| Teaspoon (US) | US gallons |
|---|---|
| 0.25 Teaspoon (US) | 0.000325521 US gallons |
| 0.5 Teaspoon (US) | 0.000651041 US gallons |
| 1 Teaspoon (US) | 0.00130208 US gallons |
| 2 Teaspoon (US) | 0.00260417 US gallons |
| 3 Teaspoon (US) | 0.00390625 US gallons |
| 4 Teaspoon (US) | 0.00520833 US gallons |
| 5 Teaspoon (US) | 0.00651041 US gallons |
| 10 Teaspoon (US) | 0.0130208 US gallons |
| 20 Teaspoon (US) | 0.0260417 US gallons |
| 25 Teaspoon (US) | 0.0325521 US gallons |
| 50 Teaspoon (US) | 0.0651041 US gallons |
| 100 Teaspoon (US) | 0.130208 US gallons |
About the Teaspoon (US)
US teaspoon = 4.93ml.
- Symbol
- tsp
- Value in SI
- 1 Teaspoon (US) = 0.00492892 litre
- Typical use
- cooking
- Source
- UnitConvertLab measurement atlas
Every atlas conversion routes through the SI litre. See our methodology and data provenance pages for how these values are sourced and verified.
Related units and variant risk
Other cooking measures units in the Americas family, least settled first. If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.
Related conversions
Frequently asked
How many US gallons are in a Teaspoon (US)?
1 Teaspoon (US) = 0.00130208 US gallons. Multiply the number of Teaspoon (US) by 0.0013020829 to get US gallons.
What is Teaspoon (US) used for?
US teaspoon = 4.93ml. It is classified as active and dates from the modern period.
Is the Teaspoon (US) value exact?
Yes for practical purposes. UnitConvertLab converts every atlas unit through the SI litre, so the arithmetic itself introduces no rounding beyond the digits shown.
How reliable is this Teaspoon (US) conversion?
Conventional value — The unit is customary but its modern value is settled and widely cited; the arithmetic itself is exact. Source: UnitConvertLab measurement atlas.
Cite this page
UnitConvertLab. (2026). Convert Teaspoon (US) to US gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/tsp-us-to-us-gallon
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