How to Calibrate Bathroom Scales – Both Digital and Original Versions

How to Calibrate Bathroom Scales

Calibration is the process of adjusting bathroom scales to respond accurately so that the indicator reads 0 when there is no weight placed on the scale. Balancing the scale is important so that accurate results are always obtained when using the scale.

Failure to perform this service after every two months, the bathroom scale will begin to show inaccurate or wrong results every time and the scale becomes less and less reliable for the user. Some digital scales come with self-calibrating features to make it an easy task.

For those that lack this feature, it is essential to calibrate manually. Now you have read our guide covering bathroom scale reviews and bought a set, now it's time to calibrate.

Steps in Calibration

1. Prepare the Bathroom Scale

Positioning the bathroom scale on a flat surface guarantees its proper functioning when you operate it. Once you are sure that it is in the right place, determine the technical characteristics of the scale i.e., the maximum weight and the accuracy required.

2. Activate the Scale

Activate the scale and wait for the readings of the scale to stabilize. Make sure that the scale is switched on 30 minutes prior to calibration to ensure the weighing surface is free from any weight while stabilizing. Look for the calibration button or mode setting (depending on the model) and press it. This should read zero after five seconds. You can also contact the user manual to determine how to set the scale to read zero lbs.

3. Weighing Test

When the scale is at 0, place an item of a known weight at the center of the scale and wait for it to calculate the results. Add another object while noting weight increment.

Once you have put the maximum load weight on the scale while recording, start removing the loads, one by one as you check how the weight decreases.

This is done to ensure equal weight distribution throughout the range.

Scale weighing test

4. Calibrate the Scale

Go to the scale and choose the calibration button or calibration mode setting. When the calibration starts, this is what happens inside the scale. The scale will be triggered to register the maximum weight of the load that was put and make the necessary adjustments. This process will take a few moments before displaying ‘zero’ or ‘End’ on the scale. It will show that the calibration process is completed.

5. Check for Successful Calibration

Once the calibration is complete, you will want to test whether it was done correctly and that the scale works properly. Start by removing the substitute weigh on the scale then turn it off for 1 minute. Pick another item of known weight and place it on the bathroom scale after turning it on. The readings should be correct at this point to show that the calibration really worked. However, if the reading is incorrect try calibrating again following the above procedure. If the results are still incorrect, it is an indication that your bathroom scale could be having other faults and that calibration alone won’t work. Therefore, the next course of action would be to replace the parts.

Things You Need to Know About Your Bathroom Scale

Placing Bathroom Scale

First, you need to know that every time you move the bathroom scale from one point to another, you have to calibrate it. Moving can cause the internal workings of the scale to interfere with its weighing ability and in turn, deliver inaccurate results.

Secondly, you should always place the scale on an even surface after being moved from the initial station. Also, avoid placing it on a carpet because this is not a flat surface. Thirdly, when using the bathroom scale, always stand still so that you get accurate results. Following these steps will always get you the best and accurate results from your bathroom scale, whether it’s digital or mechanical.


The calibration process is not a hard thing to do every now and then. In fact, you can choose to do this often to avoid inaccuracy in the results produced by the scale. Doing this works a great deal in maintaining the bathroom scale. Following the steps above can get you a successful calibration while at home and mostly without the help of a technician. Both digital and mechanical scales require calibration and it’s not different from the others. The same procedure is followed to achieve success in calibration.

About the Author Harry Thompson

Gaining a BSc Honours in building/ property maintenance at the University of Portsmouth Harry went into the field of renovating properties. Along the journey, he has developed a wide variety of home & garden DIY skills such as installing new kitchens and landscaping gardens.