GPD to m³ per day Converter. Instantly convert gallons per day to cubic meters per day with our accurate flow rate calculator. Real-time results.

Flow Rate Converter
Convert between GPD (Gallons Per Day) and m³/day (Cubic Meters Per Day)
Conversion Formula
1 GPD = 0.00378541 m³/day
m³/day = GPD × 0.00378541
Quick Reference Table
| GPD | m³/day |
|---|---|
| 100 | 0.379 |
| 500 | 1.893 |
| 1,000 | 3.785 |
| 5,000 | 18.927 |
| 10,000 | 37.854 |
Understanding GPD to m³/day Conversion
What is GPD (Gallons Per Day)?
GPD stands for Gallons Per Day, a common unit of measurement for flow rate in the United States. It represents the volume of liquid (typically water) that flows through a system in a 24-hour period. This measurement is widely used in:
- Water treatment facilities
- Industrial processes
- Irrigation systems
- Municipal water supply systems
- Wastewater treatment plants
What is m³/day (Cubic Meters Per Day)?
m³/day or cubic meters per day is the metric system equivalent for measuring flow rates. It's the internationally recognized standard used in most countries worldwide. One cubic meter equals 1,000 liters or 264.172 US gallons. This unit is preferred in:
- International engineering projects
- Scientific research
- Environmental studies
- Global water management
- ISO standard documentation
How to Convert GPD to m³/day
Converting GPD to m³/day is straightforward with our calculator. The conversion factor is based on the relationship between gallons and cubic meters:
Conversion Formula:
m³/day = GPD × 0.00378541
Example Calculation:
To convert 1,000 GPD to m³/day:
1,000 GPD × 0.00378541 = 3.78541 m³/day
Why Use Our GPD to m³/day Converter?
Our professional flow rate converter offers several advantages:
- Real-time Conversion: Instant results without page reload using AJAX technology
- Bi-directional Conversion: Convert both GPD to m³/day and m³/day to GPD
- High Precision: Accurate calculations for engineering and scientific applications
- User-friendly Interface: Clean, modern design for easy navigation
- Mobile Responsive: Works perfectly on all devices
- Free to Use: No registration or payment required
Common Applications of Flow Rate Conversion
Understanding flow rate conversions is essential in various industries:
Water Treatment Industry
Water treatment plants need accurate flow rate measurements to ensure proper chemical dosing, filtration efficiency, and compliance with regulatory standards. Converting between GPD and m³/day helps engineers communicate specifications across international projects.
Environmental Engineering
Environmental engineers use flow rate conversions when designing stormwater management systems, assessing groundwater extraction rates, and evaluating natural stream flows. Accurate conversions ensure proper system sizing and environmental protection.
Industrial Processes
Manufacturing facilities require precise flow rate control for cooling systems, process water, and waste streams. Converting between measurement systems allows seamless integration of equipment from different manufacturers worldwide.
Tips for Accurate Flow Rate Measurements
- Always verify the units before performing calculations
- Consider temperature effects on liquid volume
- Account for pressure variations in flow systems
- Use appropriate instrumentation for your flow range
- Regular calibration of flow meters ensures accuracy
- Document all conversions for quality control purposes
Frequently Asked Questions
Q: How accurate is the GPD to m³/day conversion?
A: Our converter uses the standard conversion factor (1 GPD = 0.00378541 m³/day) which is accurate to 6 decimal places, suitable for most engineering and scientific applications.
Q: Can I convert m³/day back to GPD?
A: Yes! Simply click the "m³/day to GPD" toggle button to switch the conversion direction. The formula will automatically adjust.
Q: What's the difference between GPD and GPM?
A: GPD (Gallons Per Day) measures daily flow volume, while GPM (Gallons Per Minute) measures instantaneous flow rate. To convert: GPD = GPM × 1,440 (minutes in a day).
Q: Is this converter suitable for professional use?
A: Absolutely! Our converter is designed for engineers, scientists, and professionals who need reliable and accurate flow rate conversions for their projects.
Conclusion
Whether you're an engineer designing a water treatment system, an environmental scientist studying water resources, or a student learning about flow rates, our GPD to m³/day converter provides accurate, instant conversions. The tool's intuitive interface and real-time calculations make it the perfect solution for all your flow rate conversion needs.
Bookmark this page for quick access whenever you need to convert between GPD and m³/day. For the most accurate results in your specific application, always consult with relevant engineering standards and regulations.
Try our Another Tool for chemical dosing systems like coagulants and flocculants:- Dosing Pump Flow Calculator
How do you convert GPD to m³/day?
To convert GPD to m³/day, multiply the GPD value by 0.00378541. For example: 1000 GPD × 0.00378541 = 3.78541 m³/day. Our calculator does this automatically for instant results.
What is the conversion factor for GPD to m³/day?
The conversion factor is 0.00378541. This means 1 GPD equals 0.00378541 m³/day, or conversely, 1 m³/day equals 264.172 GPD.
Is the GPD to m³ per day converter free to use?
Yes, our GPD to m³/day converter is completely free to use with no registration required. You can perform unlimited conversions and access all features including formulas and reference tables.
Can I convert m³/day back to GPD?
Absolutely! Our converter is bi-directional. Simply toggle the conversion mode to convert from m³/day to GPD. The calculator automatically adjusts the formula for accurate results.
What industries use GPD to m³/day conversion?
This conversion is essential for water treatment facilities, wastewater management, industrial processes, irrigation systems, environmental engineering, and municipal water supply planning.

