mL/h to GPD Converter
Enter the flow rate in ml/h below to convert it to gpd.
Convert mL/h to GPD (US)
Enter a value in ml/h (mL/h) to convert to gpd (us) (GPD).
Milliliters per Hour to US Gallons per Day Conversion Table
Table showing various milliliters per hour measurements converted to gpd. Click any preset value or arrow to load it into the converter.
| mL/h (mL/h) | GPD (US) (GPD) |
|---|---|
| 1 mL/h | 0.0063401 GPD |
| 2 mL/h | 0.0126803 GPD |
| 2.5 mL/h | 0.0158503 GPD |
| 5 mL/h | 0.0317006 GPD |
| 10 mL/h | 0.0634013 GPD |
| 15 mL/h | 0.0951019 GPD |
| 20 mL/h | 0.1268026 GPD |
| 25 mL/h | 0.1585032 GPD |
| 30 mL/h | 0.1902039 GPD |
| 50 mL/h | 0.3170065 GPD |
How to Convert mL/h to GPD
To convert ml/h to gpd, multiply the flow rate by the following conversion ratio: 0.0063401 gpd/milliliters per hour.
Since one milliliters per hour is equal to 0.0063401 gpd, you can use this simple formula to convert:
The flow rate in gpd is equal to the flow rate in ml/h multiplied by 0.0063401.
For example, here's how to convert 5 ml/h to gpd using the formula above.
How Many GPD Are in a Milliliters per Hour?
There are 0.0063401 gpd in a milliliters per hour, which is why we use this value in the formula above.
Our milliliters per hour to us gallons per day calculator automatically converts your flow rate measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
mL/h and gpd are both units used to measure flow rate. Keep reading to learn more about each unit.
What Is a Milliliters per Hour?
A milliliters per hour is a unit of flow rate equal to 1/60,000 of a liters per minute (0.000016667 L/min). Medical IV infusion pump rate unit. [1]
The milliliters per hour is classified as a metric and SI-compatible unit of flow rate. mL/h can be abbreviated as mL/h; for example, 1 milliliters per hour can be written as 1 mL/h.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the milliliters per hour (mL/h) a convenient decimal multiple of the liters per minute (L/min).
In practice, ml/h (mL/h) are widely used across fine-tolerance laboratory, analytical, and micro-scale flow rate measurements within SI metric workflows, engineering documentation, and technical data sheets.
What Is a US Gallons per Day?
A us gallons per day is a unit of flow rate equal to 0.0026288 liters per minute (L/min), the base unit for flow rate. Water treatment flow unit. [2]
The us gallons per day is classified as a US customary unit of flow rate. GPD can be abbreviated as GPD; for example, 1 us gallons per day can be written as 1 GPD.
When working with gpd (GPD) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gpd (GPD) are widely used across fine-tolerance laboratory, analytical, and micro-scale flow rate measurements within US customary workflows, engineering documentation, and technical data sheets.
When converting flow rate between ml/h (mL/h) and gpd (GPD), keep full floating-point precision (1 mL/h = 0.0063401 GPD; 1 GPD = 157.725491 mL/h) during intermediate calculations and round only the final us gallons per day figure to match your instrument tolerance.
More Milliliters per Hour & US Gallons per Day Conversions
Need to calculate in the opposite direction? Use our gpd (us) to ml/h calculator to switch your starting unit immediately. You can also explore related tools such as converting gpd (us) to ml/h, converting liters per minute to gpm (us), or converting gpm (us) to liters per minute.
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standard — mL/h (mL/h) to GPD (US) (GPD)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: Milliliters per Hour (mL/h) & US Gallons per Day (GPD) (GPD)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (mL/h to GPD)