Digital Scale Buying Guide: Readability, Capacity and Calibration
11 Oct 2026
Scales are sold on the wrong number. Capacity is printed large; readability is what you actually care about.
Readability vs capacity
A scale listed as 100g x 0.01g weighs up to 100 grams and displays in hundredth-of-a-gram steps. The second number is readability — the smallest increment it shows.
These two trade off against each other. A 1000 g scale will not read to 0.01 g, because the load cell cannot resolve that finely across that range. Buy for the smallest thing you need to weigh, not the largest.
Common pairings:
- 100g x 0.01g — the general-purpose pocket scale
- 200g x 0.01g — same resolution, more headroom
- 500g / 1000g x 0.1g — bigger loads, coarser steps
Readability is not accuracy
A scale can display 0.01 g steps and still be off by 0.05 g. The display increment tells you what it shows, not what it guarantees. Which is why calibration matters.
Calibrating
- Put the scale on a hard, level surface. Not a rug, not your hand.
- Let it sit at room temperature for a few minutes. Load cells drift when they are warming up.
- Enter calibration mode — usually by holding the mode button.
- Place the correct calibration weight. Use a proper weight; coins vary more than people assume.
- Wait for it to confirm, then verify with a known weight.
Practical notes
- Tare zeroes the display with a container on the platform.
- Draughts move the reading. Close the window.
- A flip-top lid doubles as a weighing tray and keeps dust off the platform.
- Replace batteries before they are flat — a sagging supply shifts readings.
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