Project & Area
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ft²
Or switch to “Add rectangles” to sum multiple sections.
Application & Mix
Typical: two coats for traffic-bearing areas.
%
Coverage is square feet per gallon per coat (sf/gal).
:
For ready-to-use, set 1:0.
% of diluted volume
lb / 100 gal (diluted)
Packaging & Cost (optional)
$
Ignored if ready-to-use and pail pricing is provided.
$
lb/gal
Example Scenarios
Click a row to load values.
| Scenario | Area (ft²) | Coats | Rate1 (sf/gal) | Rate2 (sf/gal) | Mix | Sand lb/100gal | Waste % |
|---|---|---|---|---|---|---|---|
| Residential driveway | 1200 | 2 | 100 | 110 | 1:1 | 20 | 5 |
| Small parking lot | 10000 | 2 | 90 | 100 | 1:1.25 | 30 | 7 |
| Trail pathway | 600 | 1 | 110 | 0 | 1:0.8 | 0 | 4 |
Results
live after Calculate
Normalized area
—
in ft²
Coats
—
Per-coat diluted gallons
Total diluted gallons
—
After waste/overlap
—
Concentrate gallons
—
Added water gallons
—
Additives (gal)
—
Sand (lb)
—
Packaging units
—
—
Liquid weight
—
lb (approximate)
Material cost
—
based on optional pricing
Cost per 1000 ft²
—
| Metric | Value | Unit |
|---|
Formula used
- Normalize area: convert to ft². If rectangles, sum Σ(length × width × qty).
- Per-coat gallons (diluted): gallonscoat i = area(ft²) ÷ ratei(sf/gal).
- Total diluted: Σ gallonscoat i.
- Waste/overlap: diluted × (1 + waste% ÷ 100).
- Mixing: diluted = concentrate × (C + W) / C. Thus concentrate = diluted × C / (C + W); water = diluted − concentrate.
- Additive volume: additive = diluted × additive% ÷ 100.
- Sand mass: sand(lb) = diluted × (sand lb per 100 gal) ÷ 100.
- Packaging count: if product is concentrate, divide concentrate gallons by package size; else divide diluted gallons.
- Weight: approximate liquid weight = diluted × density(lb/gal).
- Cost: minimum of: concentrate gallons × price/gal, or packaging units × price per pack (if provided).
How to use
- Select area mode and enter total area or rectangles.
- Set number of coats and per-coat coverage rates (sf/gal).
- Choose product type, mix ratio, and optional additive or sand.
- Enter waste percentage to cover overlaps, edges, and sprayer losses.
- Specify packaging and any pricing to estimate costs.
- Press Calculate to see detailed volumes, packages, weight, and costs.
- Use Download CSV or Download PDF to export the results.
FAQs
For rough or porous surfaces, use lower rates (e.g., 80–100 sf/gal). For tighter, previously sealed surfaces, higher rates (100–120 sf/gal) are common. Always follow manufacturer guidance.
Two coats are commonly specified for traffic areas. Light-use or decorative areas may accept one coat. Heavily trafficked or weathered pavements can require a third coat.
It is the proportion of concentrate to water by volume. A 1:1 setting means equal parts concentrate and water to make diluted sealer.
Sand can improve skid resistance and film build; performance additives can enhance cure and durability. Dosage varies by supplier; input your specified amounts for accurate totals.
If buying concentrate, we count packages from concentrate gallons. For ready-to-use products, we count packages from diluted gallons. Choose 5‑gal pails or 55‑gal drums.
Real projects lose material at edges, joints, overlaps, wind, and equipment cleanup. Adding a reasonable percentage avoids shortfalls.
Yes. Enter areas in ft² or m²; the calculator normalizes to ft² internally and shows conversions automatically.