Scientific & Engineering

Flow Rate

Convert volumetric flow between liters per minute, gallons per minute, cubic meters per hour, and cubic feet per second.

Convert flow, area, velocity, and volume timing into a compact engineering planning view for pumps, HVAC balancing, process control, and commissioning checks.

Your Input and Get Results

Flow

From

Use cubic meters per second as the baseline for cross-vendor comparisons.

Results

Converted flow -

Enter values and calculate to see the output.

Converted flow

Target unit output

Baseline (m3/s)

Normalized baseline

Conversion factor

Per unit ratio

Flow split chart

Converted share Baseline share

Results table

Metric	Value
Enter values and calculate to see the output.

Precautionary guidance

Confirm unit definitions with vendor documentation before quoting flow rates.
Keep baseline m3/s values for engineering audit trails.
Update conversions when pump curves or process conditions change.
Use consistent rounding rules across commissioning reports.
Recalculate after changes in viscosity or temperature assumptions.
Store exports with equipment IDs and maintenance notes.

Keep flow conversions with pump sizing and commissioning records.

Flow Rate Calculator Details

Use this flow rate calculator when a pump curve, process datasheet, irrigation note, HVAC schedule, or field reading uses a different unit than the one needed for reporting. It keeps the entered value visible, converts through a cubic-meters-per-second baseline, and then shows the requested output unit with a simple conversion factor for review.

Core Formula

Every conversion is normalized through cubic meters per second. The calculator multiplies the entered flow by the source-unit factor, then divides by the target-unit factor. This avoids direct unit-pair mistakes and keeps LPM, GPM, m3/h, and CFS comparable.

Supported Units

Liters per minute are common in small pumps and dosing systems. Gallons per minute are common in US pump and plumbing references. Cubic meters per hour are common in industrial and HVAC documentation. Cubic feet per second are useful for larger civil, drainage, and channel-flow references.

Engineering Use

Use the output for pump sizing, commissioning records, irrigation planning, chemical batching, air or water balancing, and vendor comparison. Keep the baseline value in exports so teams can compare equipment even when suppliers quote different units.

Input Guidance

Enter the measured or specified flow rate exactly as provided. Do not mix pressure, velocity, or pipe area unless the flow rate has already been calculated from those values. If the source value is rounded, keep that limitation in the final report.

Result Review

The result panel shows the converted flow, normalized baseline, and conversion factor. The chart is a quick visual aid for the current conversion, while the table provides the audit-friendly values needed for CSV, Excel, PDF, or copied summaries.

Practical Cautions

Confirm whether the source uses US gallons or another gallon definition.
Check whether real operating flow changes with pressure, temperature, viscosity, or elevation.
Use vendor pump curves and system curves for final design decisions.
Keep unit conversions separate from safety, code, and equipment-rating decisions.