Unit Converter
Convert From Litres per Hour to Gallons per Hour and Vice Versa
Litres per Hour ↔ Gallons per Hour
Type in either litres per hour or gallons per hour — it’ll convert to the other automatically!
🚿 What is Litres per Hour (L/h)?
Litres per hour is a metric unit of **volumetric flow rate**, indicating how many **litres of fluid flow through a system per hour**. It’s widely used in **agriculture**, **chemical dosing**, **fuel systems**, and **water pumps**.
🛢️ What is Gallons per Hour (GPH)?
Gallons per hour is an imperial/U.S. unit of **volumetric flow rate** commonly used in the **United States** for measuring **fuel pumps**, **sprinklers**, and **aerators**. 1 liter = 0.264172 gallons, so: 1 L/h ≈ 0.264172 GPH.
🧠 Quick Comparison
| Unit | Equivalent | Used In |
|---|---|---|
| 1 L/h | 0.264172 GPH | Metric countries – irrigation, dosing pumps |
| 1 GPH | 3.78541 L/h | USA – fuel flow, garden systems |
🧮 How to Convert
L/h to GPH: GPH = L/h × 0.264172
GPH to L/h: L/h = GPH × 3.78541
Example:
100 L/h × 0.264172 = 26.42 GPH
💡 Pro Tip
U.S. equipment often uses **GPH** ratings, while European and international gear uses **L/h**. Always convert when replacing or comparing pumps, especially for **irrigation, aquarium filters, and automotive fuel delivery**.
🎉 Did You Know?
A drip irrigation system might deliver only **2 L/h per emitter**, which equals about **0.5 gallons/hour** — perfect for slow, consistent watering!
🌍 Real-World Flow Examples
- 2 L/h – Drip irrigation emitter
- 100 L/h – Small aquarium filter or low-flow fuel pump
- 500 L/h – Home water feature pump
- 1000 GPH – High-output fuel system or waterfall pump
📊 L/h to GPH Conversion Chart
| L/h | GPH |
|---|---|
| 1 | 0.26 |
| 10 | 2.64 |
| 50 | 13.21 |
| 100 | 26.42 |
| 500 | 132.09 |
| 1000 | 264.17 |
📜 Timeline: Flow Measurement History
- 1800s: Gallons/hour used in irrigation and fuel regulation
- 1900s: Litres/hour adopted across Europe and scientific labs
- Today: Both units coexist; conversion is key in international trade
🌐 When to Use L/h vs GPH
- 🚿 L/h: Drip irrigation, dosing systems, labs, EU specs
- ⛽ GPH: U.S. fuel systems, garden sprayers, small engines
- 🧮 Quick Tip: Multiply L/h × 0.264172 to convert to GPH
🎯 Interactive Converter
100 L/h = 26.42 GPH