What can I use to calibrate my digital scale 100g?
If you have 20 nickels, or 40 pennies, you have 100 grams that you can use for calibration. Place the coins on the scale and observe the reading. The mass should read 100.000 grams exactly. If the reading is any more or less than 100.000 grams, you again can determine a calibration value.
1 new US nickel weighs 5 grams, so 20 nickels weigh 100 grams. If you don’t find 20 nickels in your pockets, you can use a combination of nickels and pennies.