A scale's resolution determines the smallest weight increment it can measure. Higher resolution (smaller increments) generally leads to greater precision, but not necessarily greater accuracy, in your cooking measurements.
Let's break down the difference between accuracy and precision and how scale resolution affects them.
Accuracy refers to how close a measurement is to the true or actual value. A scale could consistently display weights that are off by a certain amount (e.g., always reading 2 grams heavier than the actual weight). This scale would be inaccurate, even if it has a high resolution. Calibration is key to accuracy.
Precision refers to the repeatability or consistency of a measurement. A scale with high precision will give you very similar readings each time you weigh the same object. A scale with a resolution of 0.1 grams is more precise than a scale with a resolution of 1 gram because it can distinguish between smaller differences in weight.
For most cooking purposes, a scale with 1-gram increments is sufficient. This is because many recipes are forgiving, and slight variations in ingredient amounts won't significantly impact the final result. However, a more precise scale (e.g., 0.1-gram increments) becomes crucial in situations where accuracy and precision are paramount:
Always calibrate your scale before use, especially if you've moved it or suspect it might be inaccurate. Use a known weight (like a calibration weight or even a coin of known weight) to verify its accuracy and adjust if necessary.