Convert US Gallon to Drop
Convert us gallons to drops instantly. 1 us gallon = 75708.23568 drop — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Drop to US Gallon converter for the reverse conversion.
Units explained
US Gallon
The US liquid gallon is defined as exactly 231 cubic inches (3.785411784 liters).
Based on the English wine gallon of 231 cubic inches, retained by the US after 1824.
The primary US unit for fuel, milk and large beverage containers.
English wine gallon; US since 1824.
Drop
A drop is a nominal small volume of about 0.05 mL; the exact size varies with the liquid and dropper.
Standardized loosely in pharmacy as roughly 1/20 of a milliliter (the metric drop).
Used for liquid medication and flavor dosing; treat as approximate.
Pharmacy convention.
US Gallon to Drop conversion formula
Note: this conversion uses a generally accepted modern value. Historical and regional definitions of this unit varied across times and places.
The relationship between us gallons and drops:
To convert us gallons to drops, multiply the value in us gallons by 75708.23568. To reverse, multiply drops by 1.32086e-5.
How to use this converter
Type a value into the calculator. The result in drops updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Drop to US Gallon converter for the reverse direction.
Step-by-step: convert us gallons to drops
- Write down the value in us gallons (gal).
- Multiply that value by the factor 75708.23568.
- The product is the equivalent value in drops (gtt).
- To reverse, multiply the drop value by 1.32086e-5.
Worked examples
Example 1 — Convert 1 gal to gtt:
1 × 75708.23568 = 75708.23568 gtt
Example 2 — Convert 100 gal to gtt:
100 × 75708.23568 = 7570823.5680000009 gtt
Real-world example — Centimeter to wavelength scale
One us gallon equals 10 million drops. Physics curricula use this kind of conversion to relate everyday measurements to atomic and optical scales.
1 gal × 75708.23568 = 75708.23568 gtt
Real-world example — Small-scale to atomic-scale
One us gallon equals 10 million drops — useful for physics curricula that relate everyday measurements to atomic and optical scales.
1 gal × 75708.23568 = 75708.23568 gtt
US Gallon to Drop conversion table
Standard reference values for converting us gallons to drops:
| US Gallon [gal] | Drop [gtt] |
|---|---|
| 0.01 | 757.0823568 |
| 0.1 | 7570.823568 |
| 1 | 75708.23568 |
| 2 | 151416.47136 |
| 3 | 227124.70704 |
| 4 | 302832.9427200001 |
| 5 | 378541.1784000001 |
| 10 | 757082.3568000002 |
| 20 | 1514164.7136000004 |
| 30 | 2271247.0704000005 |
| 40 | 3028329.4272000007 |
| 50 | 3785411.7840000005 |
| 100 | 7570823.5680000009 |
| 500 | 3.785412e+7 |
| 1000 | 7.570824e+7 |
Frequently asked questions
How many drops is 1 us gallon?
How do I convert us gallons to drops?
How do I convert drops back to us gallons?
How many drops is 100 us gallons?
Popular volume unit conversions
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Metric / SI (15 units)
US Customary (Liquid) (14 units)
US Customary (Dry) (5 units)
Imperial (UK) (14 units)
Cubic (length-derived) (4 units)
Cooking / Culinary (5 units)
Sources & references
Conversion factor (1 gal = 75708.23568 gtt) 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.