Continuity Equation Calculator

Volumetric Flow Rate, Fluid Velocity, and Flow Area

Created by: Dilan Abel Acevedo Hernández | Date: September 10, 2026

How to Use This Tool

1. Select the variable you want to calculate: flow rate (Q), velocity (V), or flow area (A).
2. Enter the two known quantities using MKS units: m³/s, m/s, or m².
3. The result is calculated automatically as you enter valid data. You may also press the Calculate button.
4. The calculated value is displayed in MKS, CGS, and British (Imperial) units.
5. Negative values are not permitted, and division by zero is prevented.

Governing Equation

\[ Q = V \times A \]

\(Q\) = volumetric flow rate, \(V\) = average fluid velocity, and \(A\) = cross-sectional flow area.

Equation for selected calculation: \(Q = V \times A\)

Calculator

Variable to Calculate Volumetric Flow Rate (Q) Fluid Velocity (V) Flow Area (A)

Volumetric Flow Rate, Q (m³/s)

Fluid Velocity, V (m/s)

Flow Area, A (m²)

Enter the two known quantities in MKS units.

Results and Unit Conversions

Volumetric Flow Rate (Q)

— m³/s

Unit System	Value	Unit
MKS (SI)	—	m³/s
CGS	—	cm³/s
British (Imperial)	—	ft³/s

Conversion factors: 1 m³/s = 10⁶ cm³/s = 35.3146667 ft³/s; 1 m/s = 100 cm/s = 3.2808399 ft/s; 1 m² = 10⁴ cm² = 10.7639104 ft².