How to tell if a tire pressure gauge needs calibration?
2026-05-12
How to judge whether the tire pressure gauge needs to be calibrated? Just look at it
1. The simplest 3-step self-test (enough for home use)
Zero check
Release all pressure, and the pointer of the mechanical watch must accurately point to 0; the electronic watch must display 0 even when it is unloaded, and it must be calibrated if it does not return to zero.
Multiple retests on the same fetus
Pull out the same tire and retest it three times:
If the reading fluctuates by more than 0.1bar, the accuracy has drifted and needs calibration.
Benchmarking method (most accurate)
Find a reliable and accurate tire pressure gauge/auto repair shop air pump gauge, and continuously measure the same valve when the tires are cold:
Difference ≤0.1bar: no calibration required
Difference 0.15～0.25bar: Calibration recommended
Difference >0.3bar: Must be calibrated or replaced directly
2. If any of these situations occur, you need to calibrate immediately.
The standard tire pressure for new car door frames is 2.5, which is enough for you, but the tire pressure monitoring is much worse.
The front and rear tire pressures were measured at the same standard, and the readings were ridiculously different.
It has been dropped, shaken, flooded, and has been used for more than 2 years and has never been calibrated.
The pointer of the mechanical watch is stuck, slightly offset from zero, and cannot return to the origin after letting go.
The battery of the electronic watch is charged, but the reading jumps randomly, high and low.
3. Supplement some common sense
For ordinary household tire pressure gauges, it is recommended to calibrate them every six months/year; for those frequently used for vehicle bumps and auto repairs, it is enough to check them once every three months.
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