---
title: "Teaspoons to US gallons — tsp to gal converter"
description: "1 teaspoon = 0.0013021 US gallons. Convert teaspoons to US gallons with a full conversion table, the exact formula, and a calculator for any value."
url: https://atoneplace.net/convert/teaspoons-to-gallons/
site: "At One Place"
---

# Teaspoons to US gallons

**1 teaspoon in US gallons: 1 tsp = 0.0013021 gal**

gal = tsp × 0.001302083333

To convert teaspoons to US gallons, multiply by 0.001302083333. The table below gives the values people look up most often, and the converter works for any number.

## Teaspoons to US gallons table

*Common teaspoon values converted to US gallons.*

| Teaspoons | US gallons |
| --- | --- |
| 1 tsp | 0.0013021 |
| 2 tsp | 0.0026042 |
| 3 tsp | 0.0039063 |
| 4 tsp | 0.0052083 |
| 5 tsp | 0.0065104 |
| 10 tsp | 0.013021 |
| 15 tsp | 0.019531 |
| 20 tsp | 0.026042 |
| 25 tsp | 0.032552 |
| 30 tsp | 0.039063 |
| 40 tsp | 0.052083 |
| 50 tsp | 0.065104 |
| 75 tsp | 0.097656 |
| 100 tsp | 0.13021 |
| 250 tsp | 0.32552 |
| 500 tsp | 0.65104 |
| 1,000 tsp | 1.302083 |

## How the conversion works

The relationship is gal = tsp × 0.001302083333. Both units measure volume, so the conversion is a fixed factor that never changes. The figure is exact rather than approximate: since the international yard and pound agreement of 1959, an inch is defined as exactly 25.4 millimetres and a pound as exactly 0.45359237 kilograms, and every other imperial and US customary unit here is derived from those two.

> US gallon: US liquid gallon. The imperial gallon is about 20% larger.

## Common questions

### How many US gallons are in one teaspoon?

One teaspoon equals 0.0013021 US gallons. gal = tsp × 0.001302083333.

### How do you convert teaspoons to US gallons?

Use gal = tsp × 0.001302083333. So 10 tsp is 0.013021 gal.

### How many teaspoons are in one US gallon?

One US gallon equals 768 teaspoons, which is the reverse of the conversion above.

### Is there more than one kind of US gallon?

US liquid gallon. The imperial gallon is about 20% larger.

## Related pages

- [US gallons to Teaspoons](https://atoneplace.net/convert/gallons-to-teaspoons/)
- [Teaspoons to Liters](https://atoneplace.net/convert/teaspoons-to-liters/)
- [Teaspoons to Milliliters](https://atoneplace.net/convert/teaspoons-to-ml/)
- [Teaspoons to Cubic meters](https://atoneplace.net/convert/teaspoons-to-cubic-meters/)
- [Teaspoons to US quarts](https://atoneplace.net/convert/teaspoons-to-quarts/)
- [Teaspoons to US pints](https://atoneplace.net/convert/teaspoons-to-pints/)
- [Teaspoons to US cups](https://atoneplace.net/convert/teaspoons-to-cups/)
- [Teaspoons to US fluid ounces](https://atoneplace.net/convert/teaspoons-to-fl-oz/)
- [Teaspoons to Tablespoons](https://atoneplace.net/convert/teaspoons-to-tablespoons/)

## Sources

- Guide for the Use of the International System of Units (SP 811) — NIST (https://www.nist.gov/pml/special-publication-811) [Public domain (US Government)]
- The International System of Units (SI Brochure) — Bureau International des Poids et Mesures (https://www.bipm.org/en/publications/si-brochure)
- Calculated on this page — At One Place (/about/)