Water Needed
997 gal
Fill Time
2.1 hrs
Freeze Time
≈24 hrs
Total Weight: 8,315 lbs
That is 4.2 tons of water weight on your surface.
Always build backyard rinks on ground level. The weight of the water alone can exceed the load capacity of most residential decks. A 40×20 rink with 2 inches of ice weighs nearly 5,000 lbs.
Build in Layers
Don’t fill all at once. Add 1/4 inch of water at a time and let each layer freeze before adding more. This creates stronger, clearer ice.
Resurface Regularly
Flood the surface with a thin layer of hot water every 2–3 days of use. This fills in skate marks and keeps the surface smooth.
Snow Removal
Clear snow within 24 hours of a snowfall. Snow insulates the ice and slows freezing. Use a push broom or plastic shovel to avoid damaging the liner.
Season Length
Most backyard rinks last 8–12 weeks in northern climates. You need consistent overnight temperatures below 25°F for the ice to maintain. Daytime highs above 40°F will cause surface melting.
Inputs
Result
Volume = 40 × 20 × (2/12) = 133.3 cu ft. Water = 133.3 × 7.48 = 997 gallons. Fill time = 997 / (8 × 60) = 2.1 hours. At 20°F, 2 inches freezes in about 24 hours. Liner = (40+4) × (20+4) = 44 × 24 ft.
Inputs
Result
Volume = 60 × 30 × (4/12) = 600 cu ft. Water = 600 × 7.48 = 4,489 gallons. Fill time = 4,489 / (8 × 60) = 9.4 hours. At 10°F, 4 inches freezes in about 32 hours (16 hrs base × 2 for double thickness). Weight = 4,489 × 8.34 = 37,438 lbs (18.7 tons).
A standard 40×20-foot rink with 2 inches of ice needs about 997 gallons of water. The formula is length × width × (thickness/12) × 7.48 gallons per cubic foot. A larger 60×30 rink with 4 inches needs about 4,490 gallons.
At 20°F overnight, 2 inches of ice takes about 24 hours to freeze. At 0°F it takes about 12 hours. Thicker ice takes proportionally longer — 4 inches at 20°F needs roughly 48 hours. Build in thin layers for best results.
2 inches is the minimum for recreational skating. 3 inches is standard for regular use and light hockey. 4 inches supports heavy hockey use and multiple skaters. Building thicker ice takes more water and freeze time but lasts longer during warm spells.
| Ice Thickness | Water (40×20 rink) | Best Use |
|---|---|---|
| 2 inches | ≈997 gallons | Kids, casual skating |
| 3 inches | ≈1,496 gallons | Regular use, light hockey |
| 4 inches | ≈1,994 gallons | Heavy hockey, multiple skaters |
Water cost averages about $4 per 748 gallons (1 CCF). A typical 40×20 rink costs $5–10 in water. The bigger costs are the liner ($50–150), boards ($100–300), and your water bill if you need to resurface frequently through the season.
Generally no. A 40×20 rink with just 2 inches of ice weighs nearly 5,000 pounds. Most residential decks are designed for 40–60 pounds per square foot live load, and the concentrated weight of ice plus skaters can exceed this. Always build on ground level.
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Last Updated: Mar 9, 2026
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