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Quick answer: most small sellers need a digital postal scale with 0.1 oz accuracy and a 50 to 90 lb capacity. That covers poly mailers through medium boxes. Only buy a heavy-duty 300 lb platform scale if you regularly ship large or palletised items.
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Why the scale matters
Carriers re-weigh parcels. If you under-declare, you pay an adjustment later; if you over-declare, you overpay on every label. Both Ship with Walmart and Amazon Buy Shipping price from the weight and dimensions you enter, so a cheap, accurate scale pays for itself quickly.
What to look for
| Feature | What you want |
|---|---|
| Accuracy | 0.1 oz increments for light parcels |
| Capacity | 50 lb minimum; 86 to 90 lb gives headroom |
| Display | Detachable or angled, so a large box does not hide it |
| Hold function | Keeps the reading after you lift the box |
| Power | Batteries plus an AC adapter or USB |
| Units | Switches between lb/oz and kg |
Tips from seller operations
- Weigh the packed parcel, including mailer, void fill and label.
- Keep the scale on a flat, hard surface at your packing station, not on a soft mat.
- Check it weekly with a known weight, such as a sealed pack of printer paper.
- Always round up to the next ounce when entering weights.
Popular options
For heavy or bulky items, a platform scale such as the Brecknell PS330 handles much larger loads.
Related: dimensional weight in 2026.