Calibrating a Tire Pressure Gauge

When maintaining a car, calibrating a tire pressure gauge is quite important. Misreading may lead to technical difficulties like a blown tire. And when you are driving at speed, a burst tire could be disastrous. So, make sure your tires’ air pressure is at the correct level. Calibrating a tire pressure gauge takes a little time.


Materials Needed:

  • Lots of water
  • 25 meters long hose pipe
  • A 25 meters or higher building
  • A marker pen
  • Someone to help
  • A tire pressure gauge
  • 25m tape measure


Step 1 – Mark The Hose

Unwind and untie the measuring tape to no less than 25m and place it beside the hose. Now, use the marker pen to mark down points indicating every meter, and, specifically, the 25m, 20m, and 10m points.


Step 2 – Go on Top of the Building

Now standing on top of the building, unravel the hose. Try to keep the hose kink-free and straight as much as possible. Now connect the end of the hose to the tire pressure gauge at ground level.


Step 3 – Check the Calibration

Gradually fill the hose until it reaches the 1 m point. The appropriate reading should be 1.4223 PSI. If the reading in the gauge seems accurate, continue filling. Each and every meter of water will raise the PSI by 1.4223. To reduce hassles, you can follow the chart below:

  • 10m – 14.2 PSI
  • 20m – 28.4 PSI
  • 25m – 35.5 PSI

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Step 4 – Recalibrate the Gauge

Even after reaching the first-meter mark if you find the gauge reading to be nowhere near the 1.4223 PSI, then recalibrate and restart from step 2. And if it seems impossible to recalibrate, then the tire pressure gauge must be faulty. Replace it.


Step 5 – Shorter Hose

If you are using a shorter hose, then it is possible to get the job done without too much water, high-rise buildings, and people. The only setback is it will decrease accuracy significantly – as a 3 meters gauge can’t maintain enough accuracy equate the one with 25 meters. Unless you don’t have all the resources required for pressure gauge calibration, don’t use the shorter hose.


Step 6 – Gas Station Gauges

Calibrating a Tire Pressure Gauge

Many simply rely on gas station gauges, but they are unreliable, for the reading varies. The other option open to you is digital tire pressure gauges. But some of them are accurate, and some are not. Do all relevant homework online or offline beforehand before you proceed to buy a digital gauge. Last but not least, you can have the gauge calibrated by someone professional for a fee.