How to use the torricelli's law calculator
Find speed of water leaving a hole in a tank. Enter fluid depth above hole, hole area in the fields above; the exit speed, flow rate are computed instantly and plotted on the chart so you can see how the answer changes.
Formula
Variables
- h — Fluid depth above hole (m)
- A — Hole area (cm²)
Worked example
With fluid depth above hole = 2 m, hole area = 3 cm², the calculator gives exit speed ≈ 6.263114 m/s; flow rate ≈ 1.878934 L/s.
Frequently asked questions
What is the formula for the torricelli's law calculation?
Exit speed (m/s) = √(2 × GRAV × h). Flow rate (L/s) = [Exit speed] × A / 10000 × 1000. Here h is fluid depth above hole (m), A is hole area (cm²).
What inputs do I need for the torricelli's law calculator?
You need fluid depth above hole in m, hole area in cm². Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use this calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.