How to use the capillary rise calculator
Find how high a liquid climbs inside a narrow tube from surface tension and contact angle. Enter surface tension, contact angle, liquid density, tube radius in the fields above; the capillary rise is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “capillary action height”, “water rising in tube”, “capillary rise”, “calculate capillary rise”, “find capillary rise”.
Formula
Variables
- sig — Surface tension (N/m)
- th — Contact angle (°)
- rho — Liquid density (kg/m³)
- rc — Tube radius (mm)
Worked example
With surface tension = 0.072 N/m, contact angle = 0 °, liquid density = 1000 kg/m³, tube radius = 0.5 mm, the calculator gives capillary rise ≈ 29.36783 mm.
Frequently asked questions
What is the capillary rise calculator used for?
Find how high a liquid climbs inside a narrow tube from surface tension and contact angle. It helps with questions such as “capillary action height”, “water rising in tube”, “capillary rise”.
What is the formula for the capillary rise calculation?
Capillary rise (mm) = 2 × sig × cos(th) / (rho × GRAV × (rc / 1000)) × 1000. Here sig is surface tension (N/m), th is contact angle (°), rho is liquid density (kg/m³), rc is tube radius (mm).
What inputs do I need for the capillary rise calculator?
You need surface tension in N/m, contact angle in °, liquid density in kg/m³, tube radius in mm. 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 the capillary rise 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 capillary rise 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.