Practical Flow Conversion for Daily Planning
A GPH to LPH calculator helps convert pump, filter, nozzle, and tank flow rates into a metric format. GPH means gallons per hour. LPH means liters per hour. The result depends on the gallon standard. A United States liquid gallon is smaller than an imperial gallon. This tool lets you select the correct standard before calculation.
Why the Gallon Standard Matters
Many product labels use gallons per hour. Aquariums, water gardens, fuel systems, sprayers, and small pumps often list capacity this way. International manuals may use liters per hour. Using the wrong gallon can create a noticeable difference. That difference matters when sizing pumps, estimating refill time, or comparing equipment from different regions.
Planning With Converted Flow
The calculator also estimates total volume for a chosen runtime. This is useful when a pump runs for several hours, a dispenser feeds liquid into a process, or irrigation equipment supplies water during a set window. You can apply an efficiency factor as well. Real systems lose flow because of hose length, fittings, height, filters, and wear. Efficiency gives a practical adjusted result.
Better Documentation and Sharing
Clear records help teams avoid repeated work. The CSV export is useful for spreadsheets, job notes, or maintenance logs. The PDF export is useful for reports, quotes, and printable summaries. Example rows show common values, so users can compare their answer with expected ranges.
Use Cases
Use this converter for aquarium filtration, pond circulation, fuel transfer, dosing systems, water treatment, agricultural spraying, and laboratory planning. It can also help when checking pump curves or supplier data. The formula is simple, but the settings make the result more dependable. Enter the flow, choose the direction, select the gallon type, add runtime when needed, and review the adjusted values before using the result in real equipment decisions.
Common Accuracy Notes
Always check whether a label means United States liquid gallons or imperial gallons. Do not mix peak flow with working flow. Peak values are measured under easy test conditions. Installed systems may deliver less. For critical projects, confirm pipe diameter, pressure, lift height, liquid temperature, and manufacturer data. Use the exported result as a planning aid, not a certified performance test only.