Ice melt calculator
Salting the driveway before the storm? Enter the area and product — get pounds at safe-for-concrete rates and the bag count.
Result
Ice melt needed
How much ice melt do I need?
Formula
lb = area ft² × rate (lb per 1,000 ft²) ÷ 1,000 · bags = lb ÷ bag size
Example — standard two-car driveway (about 600 ft²): with rock salt (5 lb/1k): 3 lb per application — a single 10 lb jug covers three storms. With calcium chloride: 1.5 lb per pass.
Pick the right product
| Product | Works to | Rate | Watch out |
|---|---|---|---|
| Rock salt (sodium chloride) | ~15°F | 4–6 lb/1k | Concrete damage, grass burn, paws |
| Calcium chloride | −25°F | 2–3 | Costs 2–3×; slightly oily residue |
| Magnesium chloride | ~5°F | 3–4 | Gentler on concrete & pets |
| Sand / kitty litter | no melting | — | Traction only; sweep in spring |
Concrete rule: don't salt concrete under 1 year old, and never use rock salt on new or decorative concrete — magnesium chloride or sand instead. Pre-apply before the storm: 30–50% less product than melting ice after.
Gravel drives don't pit — but salt washes into the base; most people sand gravel. More winter math: gravel driveway guide.
Frequently asked questions
How much ice melt for a standard driveway?
A 600 ft² driveway needs 3 lb of rock salt or 1.5 lb of calcium chloride per application — well under one 10 lb jug.
How much does a 50 lb bag of ice melt cover?
At 5 lb/1,000 ft²: 10,000 ft² per application — roughly 16 two-car driveways, or one driveway all winter.
Can I use too much ice melt?
Yes. Beyond the label rate it doesn't melt faster — it kills lawn edges, pits concrete, corrodes metal and tracks onto floors. The calculator uses label-rate amounts.
What's safest for pets and concrete?
Magnesium chloride or a labeled pet-safe blend, applied pre-storm at label rate. Rinse paws after walks regardless.
Does ice melt work in extreme cold?
Rock salt stops working below ~15°F. Below that switch to calcium chloride (to −25°F) or use sand for traction.