Pressure Calculators
Browse our comprehensive collection of pressure calculators for PSI, kPa, atm, bar, mmHg, hydrostatic pressure, gas laws, manometers, and more. Free online tools for engineers, students, and professionals.
PSI to kPa Converter
Convert pounds per square inch (PSI) to kilopascals (kPa) with step-by-step formula.
conversionkPa to PSI Converter
Convert kilopascals (kPa) to pounds per square inch (PSI) with detailed steps.
conversionAtm to kPa Converter
Convert standard atmospheres (atm) to kilopascals (kPa) using exact conversion factor.
conversionBar to PSI Converter
Convert bar to pounds per square inch (PSI) with multiplication by 14.5038.
conversionmmHg to kPa Converter
Convert millimeters of mercury (mmHg) to kilopascals (kPa) using 1 mmHg = 0.133322 kPa.
conversioninHg to kPa Converter
Convert inches of mercury (inHg) to kilopascals (kPa) with exact factor.
conversionPascal to PSI Converter
Convert pascals (Pa) to pounds per square inch (PSI) with formula (1 PSI = 6894.76 Pa).
conversionUniversal Pressure Converter
Convert between any pressure units: Pa, kPa, MPa, psi, atm, bar, mmHg, torr, and more.
conversionHydrostatic Pressure Calculator
Calculate pressure at depth in a fluid using P = ฯgh with density and depth.
hydrostaticPascal's Principle (Hydraulic Press)
Calculate force multiplication in hydraulic systems using Pascal's principle.
hydrostaticBuoyant Force Calculator
Calculate buoyant force, displaced volume, and apparent weight in fluids.
hydrostaticFluid Pressure Gauge to Absolute
Convert gauge pressure to absolute pressure by adding atmospheric pressure.
hydrostaticHead Pressure Calculator
Convert pressure head (feet or meters of fluid) to pressure (psi, kPa, etc.).
hydrostaticDensity from Pressure & Depth
Calculate fluid density given pressure difference and depth.
hydrostaticManometer Fluid Height Difference
Calculate pressure difference from height difference in a manometer using fluid density.
hydrostaticWater Pressure at Depth
Calculate water pressure in psi or kPa at any depth (freshwater or seawater).
hydrostaticIdeal Gas Law (PV = nRT)
Calculate pressure, volume, temperature, or moles using the ideal gas law.
gasBoyle's Law (PโVโ = PโVโ)
Calculate pressure or volume changes at constant temperature.
gasGay-Lussac's Law (Pโ/Tโ = Pโ/Tโ)
Calculate pressure or temperature changes at constant volume.
gasCombined Gas Law
Solve combined gas law problems (PโVโ/Tโ = PโVโ/Tโ) with all variables.
gasGas Density Calculator
Calculate gas density from pressure, temperature, and molar mass.
gasPartial Pressure (Dalton's Law)
Calculate partial pressure of gases in a mixture using mole fractions.
gasVan der Waals Equation
Calculate pressure of real gases using Van der Waals equation with correction factors.
gasCompressibility Factor (Z) Calculator
Estimate compressibility factor for real gases from reduced pressure and temperature.
gasAtmospheric Pressure at Altitude
Calculate atmospheric pressure at any altitude using barometric formula.
atmosphericDensity Altitude Calculator
Calculate density altitude from pressure altitude and temperature.
atmosphericPressure Altitude Converter
Convert between pressure altitude and actual elevation using standard atmosphere model.
atmosphericAir Density Calculator
Calculate air density from temperature, pressure, and humidity.
atmosphericWind Pressure (Dynamic) Calculator
Calculate wind dynamic pressure from air density and wind speed.
atmosphericStorm Surge Pressure
Estimate storm surge from atmospheric pressure drop.
atmosphericBarometric Pressure Conversion
Convert barometric pressure between inHg, mmHg, mbar, hPa, and atm.
atmosphericWeather Station Pressure Correction
Correct station pressure to sea-level pressure for weather reporting.
atmosphericU-Tube Manometer Calculator
Calculate pressure difference from U-tube manometer height difference and fluid density.
manometerInclined Manometer Calculator
Calculate pressure from inclined manometer reading with angle correction.
manometerDifferential Pressure from Manometer
Calculate differential pressure from two-leg manometer readings.
manometerGauge to Absolute Pressure Converter
Convert gauge pressure to absolute pressure and vice versa.
manometerPressure Gauge Error Calculator
Calculate error and uncertainty in pressure gauge readings.
manometerFluid Level from Pressure
Calculate fluid level (height) from measured pressure and fluid density.
manometerPressure Transducer Output
Convert pressure to electrical output (mA, V) for pressure transmitters.
manometerPressure Drop in Orifice Plate
Calculate pressure drop across an orifice plate from flow rate and dimensions.
manometerPipe Burst Pressure Calculator
Calculate burst pressure of pipe or tube from wall thickness and material strength.
engineeringPressure Vessel Wall Thickness (ASME)
Calculate minimum wall thickness for pressure vessels using ASME code formulas.
engineeringBolted Joint Pressure & Force
Calculate clamping force and pressure distribution in bolted joints.
engineeringHydraulic Cylinder Force & Pressure
Calculate force and pressure in hydraulic cylinders from bore size and fluid pressure.
engineeringCompressible Flow (Pressure Drop)
Calculate pressure drop for compressible gas flow in pipes.
engineeringNozzle Flow Pressure Drop
Calculate pressure drop through nozzles and orifices for liquid and gas.
engineeringPump Discharge Pressure Calculator
Calculate pump discharge pressure from suction pressure and pump head.
engineeringPressure Drop in Fittings & Valves
Calculate pressure drop through fittings and valves using K-factor and equivalent length.
engineeringVacuum Pressure Converter
Convert vacuum pressure between torr, mbar, Pa, and inHg.
vacuumVacuum Pump Pumping Speed
Estimate pumping speed and evacuation time for vacuum systems.
vacuumUltra-High Vacuum (UHV) Pressure
Calculate pressure in UHV systems with temperature and outgassing.
vacuumVacuum Chamber Base Pressure
Estimate base pressure in a vacuum chamber from pumping speed and leak rate.
vacuumConductance of Vacuum Components
Calculate conductance of pipes and fittings for vacuum systems.
vacuumPressure vs Leak Rate (Vacuum)
Calculate leak rate from pressure rise in a vacuum system.
vacuumVapor Pressure of Liquids
Calculate vapor pressure at a given temperature using Antoine equation.
vacuumOutgassing Rate Estimator
Estimate outgassing rate of materials in vacuum based on temperature and material type.
vacuumBlood Pressure (Systolic/Diastolic) Converter
Convert blood pressure readings between mmHg and kPa.
biologicalIntraocular Pressure Converter
Convert intraocular pressure between mmHg and kPa for glaucoma monitoring.
biologicalCentral Venous Pressure (CVP)
Convert CVP measurements between cmH2O and mmHg.
biologicalPulmonary Artery Pressure
Calculate mean pulmonary artery pressure from systolic and diastolic values.
biologicalOsmotic Pressure Calculator
Calculate osmotic pressure of solutions using van't Hoff equation.
biologicalOncotic Pressure (Colloid Osmotic)
Calculate oncotic pressure from protein concentration.
biologicalRespiratory Pressure (PIP, PEEP)
Convert ventilator pressure settings between cmH2O and kPa.
biologicalCerebrospinal Fluid (CSF) Pressure
Convert CSF pressure measurements between cmH2O and mmHg.
biologicalWhat Are Pressure Calculators?
Our Pressure Calculators collection provides a comprehensive suite of tools for converting pressure units and solving pressure-related problems in physics, engineering, meteorology, and medicine. Whether you need to convert between PSI and kPa, calculate hydrostatic pressure, analyze gas laws, or design pressure vessels, these calculators deliver accurate results with clear step-by-step explanations.
From pressure unit conversion and hydrostatic pressure to gas laws, atmospheric pressure, manometer readings, vacuum calculations, and medical pressure conversions, our tools cover the full spectrum of pressure measurement and analysis.
How to Use This Directory
- Search: Type a keyword into the search bar to find specific converters by name or description.
- Filter by Category: Use the dropdown to narrow down to a specific pressure topic โ each option shows the number of tools available.
- Click to Use: Each card links directly to the converter. Click on any card to start your pressure calculation instantly.
- Explore Category Pages: Use the "Explore More Conversion & Engineering Calculators" section to access dedicated pages for other unit types.
Why Use Our Pressure Calculators?
- Comprehensive Coverage: Covers pressure conversion, hydrostatic pressure, gas laws, atmospheric pressure, manometers, engineering applications, vacuum systems, and biological/medical uses.
- Accurate & Reliable: Uses exact conversion factors and validated formulas.
- Free & Accessible: No registration, no fees โ use any tool instantly on any device.
- Educational: Many tools show the formulas and principles behind the calculations.
- Professional & Personal Use: Designed for engineers, scientists, medical professionals, students, and hobbyists.
โ Pressure Calculators FAQ
What types of pressure conversions can I perform?
You can convert between PSI, kPa, atm, bar, mmHg (torr), inHg, Pascal (Pa), MPa, and many other units. The universal converter handles all common pressure units.
How do I convert PSI to kPa?
Use our PSI to kPa Converter. Enter the value in PSI and the tool will multiply by 6.89476 to get kPa, with step-by-step work shown.
How do I calculate hydrostatic pressure at a certain depth?
Use our Hydrostatic Pressure Calculator. Enter the fluid density and depth, and the tool will compute pressure using P = ฯgh.
What is the difference between gauge and absolute pressure?
Gauge pressure is measured relative to atmospheric pressure, while absolute pressure includes atmospheric pressure. Our Gauge to Absolute Pressure Converter handles the conversion.
How do I calculate pressure from a manometer reading?
Use our U-Tube Manometer Calculator. Enter the height difference and fluid density, and the tool will calculate the pressure difference.
How do I calculate atmospheric pressure at altitude?
Use our Atmospheric Pressure at Altitude calculator. Enter elevation and temperature, and the tool will compute pressure using the barometric formula.
How do I convert blood pressure between mmHg and kPa?
Use our Blood Pressure Converter. Enter the systolic and diastolic values in mmHg or kPa and get the equivalent in the other unit.
Are these calculators suitable for professional engineering?
Yes, our calculators use accurate formulas and standards (ASME, ISO) and are suitable for engineering design, analysis, and education.
How often are new pressure calculators added?
We regularly add new calculators based on user requests. If you have a suggestion, please contact us.
Can I use these calculators for scientific research?
Yes, our calculators use validated physical and chemical formulas, making them suitable for academic and research purposes.