A kitchen scale is helpful in giving more precise measurements for cooking and baking. A scale provides smaller increments of measurement which leads to more accuracy that can make or break a recipe. It can help manage portions for healthy eating as well as convert measurements.Take advantage of the tare function that will let you zero out the weight of the previous ingredient or that of the container thus giving you a net weight each time, up to 11 lbs or 5kgs.There is no need to calibrate this kitchen scale. Just place the scale on a flat, solid surface and press the tare button for two seconds to set it to "0" on display. Press the unit button to toggle to the unit of measurement you need and it is ready to use. This scale has the options of lb:oz, fl:oz (W), fl:oz (M) and KG as units of measure.This kitchen scale is also easy to clean with wipe of a damp cloth.2 AAA are included in this scale. The scale will turn off automatically after one minute of non-use so it is helpful to preserve batteries.AccuChef has a 2-year warranty on this product.