Convert US gallons per day to Millilitres per second
Convert US gallons per day (gpd) to Millilitres per second (mL/s) instantly and accurately.
Conversion Formula
mL/s = gpd × 0.04381263639
About US gallons per day
The US gallon per day (gpd) equals 3.785411784×10⁻³/86400 ≈ 4.381×10⁻⁸ m³/s, the standard unit in US water-utility regulation and residential water-well pump sizing. The US national average residential water use is about 80-100 gpd per person; a reverse-osmosis membrane module is rated in gpd (50-100 gpd for domestic units). 1 US gpd ≈ 4.381×10⁻⁸ m³/s.
About Millilitres per second
The millilitre per second (mL/s) equals 10⁻⁶ m³/s, common in laboratory syringe pumps, HPLC systems, and medical infusion devices. A standard IV drip running at 1 mL/s would deliver 3.6 L/h - a rapid infusion rate used in resuscitation; analytical HPLC columns run 0.5-5 mL/s. 1 mL/s = 10⁻⁶ m³/s = 60 mL/min = 3.6 L/h.
Quick Reference Table
| US gallons per day (gpd) | Millilitres per second (mL/s) |
|---|---|
| 1 gpd | 0.0438126 mL/s |
| 2 gpd | 0.0876253 mL/s |
| 5 gpd | 0.219063 mL/s |
| 10 gpd | 0.438126 mL/s |
| 25 gpd | 1.09532 mL/s |
| 50 gpd | 2.19063 mL/s |
| 100 gpd | 4.38126 mL/s |