Enter your pool's size — get the cover size to buy, the overlap math, and the accessories each cover type actually needs.
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Actual fabric size (overlap included)
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What to buyWinter pool coverBuy on AmazonSponsored — as an Amazon Associate we earn from qualifying purchases.
Covers are sold by pool size with overlap built in — match the listing's "fits pool size" line to your pool, not the fabric size. Freeform pools need a dealer template for safety covers.
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The sizing rules
above-ground: pool size + ~4 ft of fabric (2 ft overlap per side) inground standard: each dimension + ~5 ft · safety cover: sized to the pool, anchored to the deck
The overlap isn't optional slack — it's what the cable cinches against on an above-ground pool and where the water tubes sit on an inground. A cover bought to the water's exact size walks itself into the pool by January.
A worked example
A 24-foot round above-ground: buy a cover listed for a 24' pool (about 28' of actual fabric), a cable-and-winch kit, cover clips for windy sites, and an air pillow inflated two-thirds full. Total accessory spend: about $40 protecting the cover — and the walls — all winter.
Closing day, in order
Balance and shock first (the closing kit calculator has the chemical list for your gallons), drop the water level per your region's practice, blow out lines where freezing is real, then cover. The opening checklist is this list in reverse come spring — and a cover that survived the winter intact is what makes that morning short.
Frequently asked questions
What size winter cover do I need for my pool?
Above-ground: your pool's size plus about 4 feet (a 24' round pool takes a 28' cover). Inground standard covers: each dimension plus about 5 feet (a 16×32 takes roughly 21×37). Covers are sold by POOL size with the overlap built in — the calculator shows both numbers so nothing gets lost in translation.
Mesh or solid winter cover?
Mesh lets rain and snowmelt drain through (no pump needed, slightly greener spring water since fine debris passes too). Solid blocks everything but collects water on top, so it needs a cover pump all winter. Colder, wetter winters tend to favor mesh for the maintenance-free season; solid wins on spring water quality if you'll actually run the pump.
What's the difference between a winter cover and a safety cover?
A winter cover lies on the water, held by a cable (above-ground) or water tubes (inground) — it keeps debris out but supports no weight. A safety cover is a trampoline-tight anchored system that holds real weight, meets safety standards for kids and pets, and costs 3–10× more. If anyone small can wander to the pool, that difference is the whole decision.
Do I need an air pillow under an above-ground cover?
Strongly yes. The pillow makes the ice sheet slope toward the middle as it expands, instead of pushing outward against your pool walls — a $15 part protecting a $200 wall repair. Inflate it about two-thirds full so it has give.