Concrete Curing Blanket Calculator

SettingsSettings for this calculationUS

Market

Imperial · sales tax

Slab Area

The total freshly-poured concrete surface area to protect.

Use the same area as the Concrete Calculator.

Curing blankets needed

2 blankets

Medium confidence

Blankets should overlap generously at seams and extend past slab edges — this estimate includes a 15% overlap allowance, but check your specific product's recommended overlap.

Area to cover (with overlap): 253 sq ft

Then change the inputs to see how far the answer moves.

Show calculation logic

How this was calculated

Formula source(s)

A standard insulated concrete curing blanket roll (6 ft x 25 ft) covers approximately 150 sq ft

Inputs used

Slab Area: 220 sq ft

Intermediate steps

Area to cover (with overlap): 253 sq ft

Final result2 blankets

Confidence note: Blankets should overlap generously at seams and extend past slab edges — this estimate includes a 15% overlap allowance, but check your specific product's recommended overlap.

What this calculation does not cover

Counts blanket area, not insulating performance. Nothing here reads ambient temperature, wind, slab thickness or cement content, so it cannot tell you whether one layer of a given blanket keeps the concrete above freezing. Hard cold, thin sections and low-heat mixes can all call for doubled-up blankets or a heated enclosure, and the count does not double.
The 15% allowance is a flat percentage of area, so it scales with the slab and not with its perimeter. A long narrow pour — a path, a strip footing, a kerb — has far more edge per square metre than a square slab and needs more than 15% to lap the seams and hang over the sides.
Only the area you type gets covered. Slab edges and form faces, thickened edges, curbs, and any wall or column poured with the slab are not added, and edges are where the heat goes first. The wrapped area is always larger than the pour plan area.
Assumes one product: a 6 ft (1.8 m) x 25 ft (7.5 m), 150 sq ft roll, and the assumption does not change when the page is switched to metric. Other roll sizes, foam or hydronic mats, and blankets stripped off one pour and reused on the next all change what you actually buy.
This is a quantity take-off, not a cold-weather protection plan. It does not set how long protection stays on, when the concrete has gained enough strength to survive freezing, or whether heated materials, enclosures, accelerators or temperature monitoring are required — that comes from your specification and cold-weather concreting guidance such as ACI 306, backed by temperature or maturity records from the actual pour.

Estimated cost — your price

Price per blanket ($)

This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.

Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.

Sources checked 2026-09-02 · in the site-wide review of 2026-09-06 · v1.0.1

Regulatory standards & verification citations1

A standard insulated concrete curing blanket roll (6 ft x 25 ft) covers approximately 150 sq ft

Cite this page

Your workspace

Most jobs need more than one number. Add the calculators you need next and they open right here, underneath this one — your figures stay on screen and nothing is lost to a page change.

Tools and safety for this job

To cure the concrete. Generic types, no brands, no prices.

Protection this work requires

Wet cement and lime burn skin and eyes painlessly until the damage is done: waterproof gloves to EN 374, safety glasses whenever the mix can splash, and never kneel in wet mix in permeable trousers.
Boards, blocks and bagged material cause most lasting back injuries on small sites: two people or a lifter for full sheets, and never a bag on one shoulder up a ladder.
Knives cause more site injuries than any power tool: cut away from your body, change blades often, and wear cut-resistant gloves to EN 388 level C for repeated cutting.
Biocide and fungicidal washes, masonry stabilising solutions, and heating-system cleansers and inhibitors, are biocides, acids, alkalis, resins or corrosion chemicals, and the dirty water a wash or a flush brings out carries them: read the product's safety data sheet before opening it, wear waterproof chemical-resistant gloves to EN 374 and sealed glasses to EN 166 / ANSI Z87.1, and wash a splash off skin or out of an eye with clean running water at once.

Show the 2 tools this job needs

Essential

Utility knife

Recommended

Pump sprayer

Also needed as materials: replacement blades.

what each concrete tool is for, and the spec that decides which to buy where one does.

Now that you have the number

These guides cover the work this quantity is for — the first ones run this calculator inside the section that raises the question.

Slab Area	Curing blankets needed (blankets)
100 sq ft	1
150 sq ft	2
200 sq ft	2
250 sq ft	2
300 sq ft	3
350 sq ft	3
400 sq ft	4

Slab Area

Curing blankets needed (blankets)

100 sq ft

150 sq ft

200 sq ft

250 sq ft

300 sq ft

350 sq ft

400 sq ft

Frequently asked questions

Why does cold weather threaten fresh concrete?

Concrete that freezes before it reaches sufficient early strength (commonly cited as around 500 psi) can suffer permanent, irreversible strength loss and surface damage — insulated blankets trap the concrete's own heat of hydration to keep it above freezing during the critical early curing period.

How long should blankets stay on?

This varies with temperature and mix design, but a common guideline is keeping protection in place until the concrete reaches adequate strength, often several days in cold conditions — check with your ready-mix supplier or a maturity/strength testing method for your specific pour.

Are curing blankets the only cold-weather concrete precaution?

No — cold-weather concreting often also uses heated mix water/aggregate, accelerating admixtures, and monitoring ambient and concrete temperature throughout curing; blankets address heat retention specifically, not the whole cold-weather protocol.

Do blankets keep moisture in as well as heat?

Most insulated blankets have a plastic shell, so laid flat on the surface with the seams lapped and the edges weighted down they also slow the water leaving the slab. A blanket left loose at an edge lets the wind under it, and the slab loses its heat and its moisture there first.

When can a blanket go onto a fresh slab?

Once the surface is hard enough not to mark. Laid too early, a blanket can print its texture into the finish or leave it blotchy, which matters on a slab that will be seen, so ask the concrete supplier when a decorative finish can take one.

Can curing blankets be reused?

Yes. They are made to be rolled up and moved from one pour to the next, but check each one before it goes back on: a torn shell or crushed insulation lets the cold in exactly where the damage is.