Manometer Calculator

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Single-column: one open tube dipped into the fluid. U-tube single: one manometer fluid. U-tube two: one process fluid below the manometer fluid. Differential: pressure difference between two pipe points.
The fluid inside the manometer tube. Mercury is most common for high-pressure systems; water for low-pressure.
Vertical height of the manometer-fluid column above the datum. For single-column this is the full reading.
Standard Earth gravity is 9.80665 m/s². Adjust for other locations or planets.
m/s²
Standard atmosphere is 101,325 Pa. Used only to compute absolute pressure. Gauge pressure is independent of this value.
Pa
Unit for the gauge and absolute pressure outputs.
Gauge pressure (Pₘₐᵤᵧᵉ)Medium pressure
19,908.4802

Pressure at the measurement point relative to atmospheric pressure.

Absolute pressure (Pₐᵇˢ)121,233.4802
Gauge pressure in Pa19,908.48
Pressure unit selectedPa
19,908.48 Pa
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Gauge pressure: 19908.4802 Pa

  • Your U-tube single-fluid manometer reads a gauge pressure of 19908.4802 Pa, which is the pressure relative to the local atmosphere.
  • Absolute pressure (gauge + atmospheric) is 121233.4802 Pa, which is the total pressure regardless of reference.
  • For reference: 19908.5 Pa = 149.3 mmHg = 2.8875 psi.

Next stepUse this gauge pressure in Bernoulli or pipe-flow equations, or compare against the rated pressure of your equipment.

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