Convert Teaspoon (US) to imperial 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) = 0.00108421 imperial gallons
imperial gallons = Teaspoon (US) × 0.0010842108
Convert any amount
Teaspoon (US) to imperial gallons table
| Teaspoon (US) | imperial gallons |
|---|---|
| 0.25 Teaspoon (US) | 0.000271053 imperial gallons |
| 0.5 Teaspoon (US) | 0.000542105 imperial gallons |
| 1 Teaspoon (US) | 0.00108421 imperial gallons |
| 2 Teaspoon (US) | 0.00216842 imperial gallons |
| 3 Teaspoon (US) | 0.00325263 imperial gallons |
| 4 Teaspoon (US) | 0.00433684 imperial gallons |
| 5 Teaspoon (US) | 0.00542105 imperial gallons |
| 10 Teaspoon (US) | 0.0108421 imperial gallons |
| 20 Teaspoon (US) | 0.0216842 imperial gallons |
| 25 Teaspoon (US) | 0.0271053 imperial gallons |
| 50 Teaspoon (US) | 0.0542105 imperial gallons |
| 100 Teaspoon (US) | 0.108421 imperial 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 If your figure came from a land record, invoice or historical document rather than a calculator, check these before assuming a single standard.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 imperial gallons are in a Teaspoon (US)?
1 Teaspoon (US) = 0.00108421 imperial gallons. Multiply the number of Teaspoon (US) by 0.0010842108 to get imperial 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 imperial gallons. UnitConvertLab. Retrieved from https://unitconvertlab.com/regional/tsp-us-to-imperial-gallon
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