Lots, drives and walks you salt, added together.
Default 8 lb per 1,000 sq ft (about 39 g/m²), a typical contractor rate for straight rock salt; contractors commonly run 8–16 lb by pavement temperature (see the notes below).
Every salting, including the refreeze mornings.
Salt for the season
An estimate to plan an order with. Your own spreader’s calibrated rate is the better number when you have it.
Bags for the season
146
20 kg bags
Metric tonnes
2.9
3.2 US short tons
Per application
145 kg
320 lb
| Treated area | 40,000 sq ft (3,716 m²) |
| Application rate | 8.00 lb per 1,000 sq ft (39.1 g/m²) |
| Applications in the season | 20 |
| Extra for a bad winter | 0% |
| Salt per application | 320 lb (145 kg) |
| Salt for the season | 6,400 lb (2,903 kg) |
| Metric tonnes | 2.90 t |
| US short tons | 3.20 tons |
| 20 kg bags | 146 |
Area ÷ 1,000 × rate × applications. One lb per 1,000 sq ft is about 4.88 g/m².
About the rate
The default, 8 lb per 1,000 sq ft (about 39 g/m²), is a typical contractor application rate for straight rock salt; contractors commonly run 8–16 lb per 1,000 sq ft, lighter near freezing and heavier as pavement cools.
Minnesota's Smart Salting guideline for dry pavement is 1.5–3 lb per 1,000 sq ft; heavier storms and ice need more. Source: Smart Salting for Parking Lots & Sidewalks (Minnesota Pollution Control Agency, August 2022), Table 16.
The Smart Salting guideline rows, dry salt on a surface plowed clear first
| Pavement temperature | lb per 1,000 sq ft |
|---|---|
| About 30 °F (−1 °C) | 1.5 |
| 25–30 °F (−4 to −1 °C) | 1.5 |
| 20–25 °F (−7 to −4 °C) | 2.25–2.75 |
| 15–20 °F (−9 to −7 °C) | 2.75–3.0 |
| Below 15 °F (−9 °C) | Not recommended (use a blend made for the cold) |
The manual suggests moving your current rate down toward these guidelines step by step.
The numbers above, with the rate notes, in one email you can forward to your supplier. Optional.