various precision scales

• bathroom scales
  • They're cheap, they may be as precise as half a pound (0.2 kg), and they max out between 250 and 400 lbs (100 to 200 kg).
• baby / pet scales
  • They're cheap, they may be as precise as 0.5 ounce (15 grams), and they max out around 50 pounds (25 kg).
• kitchen scales
  • They're also cheap, they may be as precise as 1 gram, and they max out around 10 to 15 kg.
• 0.1 gram scales
  • They're fairly cheap.
• 0.01 gram scales
  • Amazon will sell you some for as little as $15, but reliable retailers often sell them for more than $50.
  • You will probably have to buy a separate calibration weight because the scales can fluctuate over time, which will cost another $10-15.
• 0.001 gram scales
  • Now we're getting more exotic. Reputable retailers sell these for generally >$100.
  • You will definitely need to buy a separate calibration weight, but they aren't that expensive, unless you want extremely high tolerance calibration weights.
  • They're a bit more fussy to use.
• analytical balance
• microbalance — they're multiple thousands of dollars