Pressure Converter
Articles, guides, and in-depth tips for the Pressure Converter — everything you need to get the most out of it.
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Ten Metres of Water Equals Eight Kilometres of Air
Why Fracking Needs 70 MPa and Food Pasteurisation Needs 600 MPa — Industrial Pressure Engineering Explained
Hydraulic fracturing injects water at 40-70 MPa (6,000-10,000 PSI) — pressures that must overcome 75-90 MPa of lithostatic stress from rock weight above. Here's a pressure scale from car tyres to the Mariana Trench to fracking to diamond anvil cells, supercritical CO₂ and water pressure thresholds, why aircraft hydraulics standardised at 3,000 PSI, and food High-Pressure Processing at 600 MPa (equivalent to 59 km ocean depth).
Why Blood Pressure Is Still in mmHg and Tyres Are in PSI or Bar — How Different Industries Kept Different Pressure Units
Pressure has so many units because medical, industrial, and meteorological fields all developed measurement systems independently before international standardization. Here's why blood pressure is still in mmHg globally (all clinical reference ranges are established in it), what industrial pressure ranges look like (gas cylinders at 200-300 bar vs arterial blood pressure at 0.157 atm), and why pressure unit errors in engineering specifications have caused real safety incidents.
Gauge Pressure vs Absolute Pressure: Why Almost Every Pressure Reading You See Is Actually a Difference
A tyre gauge reads "0" on a completely flat tyre — not "-14.7 PSI," which is what it would show if it were truly measuring zero pressure. This is gauge pressure: nearly every everyday pressure reading (tyres, blood pressure) is actually a difference from atmospheric pressure, not an absolute amount. Here's what absolute pressure means by contrast, why weather/barometric readings and gas-law calculations require absolute pressure specifically, and the subtle way altitude affects gauge readings independent of temperature.
Scuba Diving Physics: How Pressure Changes Underwater and Why It Creates Both Rules and Risks
At 10 metres underwater, pressure doubles. Every additional 10 metres adds another atmosphere. Here's Boyle's Law and why air spaces squeeze on descent, nitrogen narcosis and partial pressures, decompression sickness mechanics, and what NDL limits mean for recreational divers.
Atmospheric Pressure: How It Changes with Altitude, Aircraft Cabins, Tyre Pressure, and Blood Pressure
Atmospheric pressure changes with altitude, drives weather, explains why aircraft cabins are pressurised, and affects tyre performance. Here's how pressure varies from sea level to Everest, why your ears pop, and what blood pressure numbers actually mean in other units.
Pressure Converter — PSI, Bar, kPa & mmHg for Tyres, Blood & Weather
Learn pressure unit relationships (Pa, kPa, bar, PSI, atm, mmHg), tyre pressure conversion, blood pressure interpretation, weather forecasting, and the difference between absolute and gauge pressure — with a free converter.
Pressure Converter — PSI, Bar, kPa, atm & mmHg Explained
Learn how pressure units like PSI, bar, kPa, atm, and mmHg relate to each other — with real examples for tyres, weather, blood pressure, and industrial systems, plus a free pressure converter.
