Convert Imperial Gallon to Metric Teaspoon
Convert imperial gallons to metric teaspoons instantly. 1 imperial gallon = 909.218 metric teaspoon — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Metric Teaspoon to Imperial Gallon converter for the reverse conversion.
Units explained
Imperial Gallon
The imperial gallon is defined as exactly 4.54609 liters.
Set by the British Weights and Measures Act of 1824 as the volume of 10 lb of water.
Used for fuel and beverages in the UK and Commonwealth.
UK, 1824.
Metric Teaspoon
A metric teaspoon is exactly 5 milliliters.
Adopted as the standard metric small cooking measure.
Universal in metric recipes and liquid medicine dosing.
Metrication.
Imperial Gallon to Metric Teaspoon conversion formula
The relationship between imperial gallons and metric teaspoons:
To convert imperial gallons to metric teaspoons, multiply the value in imperial gallons by 909.218. To reverse, multiply metric teaspoons by 0.0010998462.
How to use this converter
Type a value into the calculator. The result in metric teaspoons updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Metric Teaspoon to Imperial Gallon converter for the reverse direction.
Step-by-step: convert imperial gallons to metric teaspoons
- Write down the value in imperial gallons (gal).
- Multiply that value by the factor 909.218.
- The product is the equivalent value in metric teaspoons (tsp).
- To reverse, multiply the metric teaspoon value by 0.0010998462.
Worked examples
Example 1 — Convert 1 gal to tsp:
1 × 909.218 = 909.218 tsp
Example 2 — Convert 100 gal to tsp:
100 × 909.218 = 90921.8 tsp
Real-world example — Adjacent metric sub-units
One imperial gallon equals 1,000 metric teaspoons. Engineers move between these scales constantly: PCB feature sizes in the larger unit, wire-bond diameters in the smaller.
1 gal × 909.218 = 909.218 tsp
Real-world example — Adjacent small-scale precision
One imperial gallon equals 1,000 metric teaspoons — the standard sub-millimeter precision conversion that materials engineers use whenever they switch between bulk material thickness specs (larger unit) and surface-finish characteristics (smaller unit).
1 gal × 909.218 = 909.218 tsp
Imperial Gallon to Metric Teaspoon conversion table
Standard reference values for converting imperial gallons to metric teaspoons:
| Imperial Gallon [gal] | Metric Teaspoon [tsp] |
|---|---|
| 0.01 | 9.09218 |
| 0.1 | 90.9218 |
| 1 | 909.218 |
| 2 | 1818.436 |
| 3 | 2727.654 |
| 4 | 3636.872 |
| 5 | 4546.09 |
| 10 | 9092.18 |
| 20 | 18184.36 |
| 30 | 27276.54 |
| 40 | 36368.72 |
| 50 | 45460.9 |
| 100 | 90921.8 |
| 500 | 454609 |
| 1000 | 909218 |
Frequently asked questions
How many metric teaspoons is 1 imperial gallon?
How do I convert imperial gallons to metric teaspoons?
How do I convert metric teaspoons back to imperial gallons?
How many metric teaspoons is 100 imperial gallons?
Popular volume unit conversions
Convert Imperial Gallon to other volume units
Show all Imperial Gallon conversions
Metric / SI (15 units)
US Customary (Liquid) (15 units)
US Customary (Dry) (5 units)
Imperial (UK) (13 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 909.218 tsp) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.