how to read digital barometer

Learning how to read digital barometer can help you measure air pressure with more accuracy, which simplifies predicting future weather in an area.

Many people already know how to use a mercury barometer, but often think reading a digital barometer would be tricky. Is it?

So, how do you read a digital barometer?

You read digital barometer comparing the readings with typical pressure, and this helps determine whether there will be any precipitation or rain or not.

Fact: In the 1600s, Italian physicist and mathematician Evangelista Torricelli developed the first mercury barometer. 

What are the Benefits of a Digital Barometer?

benefits of a digital barometer

Mercury barometers are quite popular, but digital ones are fast catching up.

Compared to analog barometers, digital ones have many advantages. Some significant benefits of a digital barometer include: 

More Accuracy

Modern sensors and processing power allow digital barometers to deliver exceptionally precise air pressure measurements.

The ability to track and record pressure fluctuations in real time has improved the accuracy of weather predictions and monitoring. 


Clear digital displays on digital barometers make it simple to read and understand pressure readings.

This is especially beneficial for those who have never used an analog barometer before and may have trouble understanding the reading. 

Additional Features

additional features

Other features, such as humidity and temperature readings, are common in digital barometers and help provide a fuller picture of the weather.

Some digital barometers have a memory function that allows you to keep track of pressure readings over time.

Seeing the pressure rise and fall over several days, weeks, or months at a time can help make better predictions.

Moreover, some digital barometers allow you to set the alarm to go off at a predetermined pressure difference.

Sailors and pilots who must keep an eye on the barometric pressure for their own safety, may find this handy. 

Easy Calibration

It is typically simpler to calibrate a digital barometer than an analog one.

Several digital barometers have calibration features that let you fine-tune the readings to make sure they are accurate.

Fact: These days, smartphones often include built-in pressure sensors that can detect weather changes and determine your precise altitude. 

How to Read Digital Barometer with Ease?

reading of digital barometer with ease

Learning to read a digital barometer may be a good idea if you want to keep tabs on the pressure in the atmosphere or try to guess the weather. 

A digital barometer’s pressure reading is displayed digitally for ease of reading and interpretation.

Here is how to use it properly:

Turn It On

Turning on a digital barometer is obviously the very first thing to do.

Digital barometers typically contain a “power” button that must be depressed in order to begin functioning.

When activated, a digital barometer shows the atmospheric pressure as it is right now. 


The digital barometer needs time to adjust its readings to account for the pressure in the air after being turned on.

Keep in mind that it takes a few minutes for the barometer to calibrate its internal sensors to the present pressure conditions. 

Consider the Units of Measurement

unit of measurement

Pressure readings from a digital barometer can be shown in different units, from millibars (mb) to inches of mercury (inHg).

Ensure that you are comfortable with the range of values that are relevant in your region by double-checking the units of measurement in use. 


Once the barometer has been adjusted for altitude, it will show the atmospheric pressure outside.

To make sense of the reading, you will need to know what the pressure is typically like where you are.

Depending on altitude and climate, the atmospheric pressure may be higher or lower than the standard 1013 mb (or 29.92 inHg) at sea level. 

When You Higher Readings

A high-pressure system is present if the digital barometer shows a pressure reading higher than normal.

Usually, this signifies that there will be no or very little precipitation. When a high-pressure system moves in, it usually ushers in a chill as well. 

When You Get Lower Readings

when you get lower readings

On the other hand, a low-pressure system is present if the pressure reading is lower than normal.

This usually indicates a cloudy day with a higher likelihood of rain.

Low-pressure systems are also known to usher in warmer weather.

Fact: In addition to providing instantaneous readings, digital barometers allow for long-term tracking of pressure variations. 

How Do You Calibrate a Digital Barometer for Accuracy?

calibrate a digital barometer

If you want reliable results from your digital barometer, you should calibrate it often.

Barometers need to be calibrated by comparing their measurements to those taken at a reference point with a recognized pressure source, like a local airport or weather station.

Also, the barometer may need adjusting or fixing if its readings are off.

Here is what you have to do: 

Finding Pressure Source

To calibrate a digital barometer, you must first locate a stable pressure source.

Someplace like a nearby airport or weather station would be ideal, as they would both often report pressure data.

As pressure readings might vary depending on height, it is important to select a source at a similar altitude to your location.

Take Readings and Compare

Having located a trustworthy pressure source, jot down the most recent reading from that source.

take readings and compare

You will have to calibrate your barometer using this as a standard.

Then, you should check the accuracy of your digital barometer by comparing it to the official data.

Take note of the disparity between the two readings if they differ. 

 Adjust Readings

The readings on most digital barometers can be tweaked with a calibration feature.

Make use of this feature to get your barometer’s reading in line with that of your trusted reference.

In the absence of such a feature, you may need to get in touch with the device’s maker or a qualified technician to have it calibrated. 

Test the Meter

test the meter

After making the necessary corrections, the digital barometer’s reading should be double-checked against the trusted reference.

Assuming the readings are consistent, your barometer is calibrated and ready to use. 

Repeat Regularly

Maintaining regular calibrations will keep your digital barometer giving you reliable readings.

The frequency of calibration is determined by the device’s usage and the manufacturer’s instructions.

Calibration is not required as often as once a year, but it is still a good idea. 

What Can Cause Inaccurate Reading on a Digital Barometer?

inaccurate readings of digital barometer

The accuracy of a digital barometer can be affected by a number of variables.

Many of the most typical are listed below: 

Temperature Fluctuations

A digital barometer’s readings may be off if the temperature suddenly changes.

Air pressure inside the barometer can fluctuate with variations in temperature, leading to erroneous readings. 

Altitude Changes

Barometric pressure fluctuates with height. Therefore, if you do not recalibrate your barometer when relocating it to a different altitude, it is likely to result in inaccurate readings. 

Defective Device

defective device

You may not get accurate readings if you use a defective barometer.

This may occur if the barometer is not properly calibrated during production or if the sensor itself is malfunctioning. 


Electronic interference from sources like laptops and cell phones can mess with digital barometer readings.

Incorrect barometer readings may result from this interaction. 

Battery Problems

battery problems

Low battery can cause the digital barometer to give off erroneous results.

In this case, its power may not be sufficient to provide a reliable reading of atmospheric pressure. 

Calibration Issues

The performance of your digital barometer depends heavily on how accurately you have calibrated it before use.

Any calibration errors will most certainly lead to incorrect readings.

Other than these issues, you may also notice your barometer showing incorrect readings due to environmental factors, such as:

It means a sudden change in humidity has a direct impact on the pressure inside your barometer. This abrupt change will produce incorrect readings.

Fact: Back when they were originally created, barometers were affixed on the walls of the mansions of the well-to-do and the scientifically curious for aesthetic purposes. 


Learning how to read digital barometer is not all that tricky.  Mostly, it is as easy as turning it on, letting it calibrate, checking the units of measurement, and interpreting the pressure reading. 

By keeping track of the variations in atmospheric pressure, you may anticipate weather conditions with a digital barometer.

But keep in mind that various factors can have an impact on how accurately your digital barometer works.