Road Salt / Deicer Calculator
Calculate how many bags of road salt or deicer you need for your driveway, walkway, or parking area based on area and application rate.
Salt/Deicer Needed
Road salt quantity is calculated from the area to treat and the recommended application rate.
Pounds Needed = Area (sq ft) × Application Rate (lbs per sq ft)
Bags Needed = Pounds Needed / Bag Size
Unit conversions:
Imperial: Area in sq ft, salt in poundsMetric: Area in m², salt in kilograms1 lb/1000 sq ft ≈ 4.88 g/m²
Application rates:
| Product | lbs per 1,000 sq ft | g per m² |
|---|---|---|
| Rock salt (NaCl) | 3–5 | 15–24 |
| Calcium chloride | 2–4 | 10–20 |
| Magnesium chloride | 2–4 | 10–20 |
| Sand (traction only) | 10–15 | 49–73 |
Effectiveness by temperature:
| Product | Effective Down To |
|---|---|
| Rock salt | 15°F (-9°C) |
| Calcium chloride | -25°F (-32°C) |
| Magnesium chloride | -13°F (-25°C) |
| Potassium chloride | 12°F (-11°C) |
Tips:
- More is not better — excess salt damages concrete, lawns, and waterways
- Apply before the storm when possible (anti-icing) — uses 75% less product
- Shovel/plow first, then apply deicer to what remains
- One coffee mug of salt (~12 oz) is enough for a 20-foot driveway section
- Sand provides traction but does not melt ice