Actual coverage depends heavily on paver size, joint width, joint depth, surface pattern and the specific product. A 50-pound bag may cover approximately 65 to 85 square feet with narrow joints, but only 22 to 42 square feet with wide joints.

How to Use the Polymeric Sand Calculator

Enter the requested project measurements and product details into the calculator.

1. Enter the Project Length and Width

Measure the entire paver area in feet.

For a rectangular patio:

Area = Length × Width

Example:

20 ft × 15 ft = 300 sq ft

For an irregular project, divide it into simple sections and add their areas together.

Include all relevant areas, such as:

Main patio
Walkways
Steps or landings
Driveway extensions
Fire-pit sections
Borders filled with the same joint sand

Do not include garden beds, walls or sections that will not contain pavers.

2. Enter the Paver Size

Smaller pavers create more joint lines per square foot and therefore require more sand.

For example, a patio built with 4 × 8-inch brick pavers normally uses more jointing sand than the same patio built with 24 × 24-inch slabs.

Representative joint lengths per square foot can differ considerably:

Paver Size	Approximate Joint Length per Square Foot
4 × 8 inches	68 linear inches
6 × 6 inches	72 linear inches
6 × 9 inches	52 linear inches
8 × 8 inches	48 linear inches
12 × 12 inches	48 linear inches
12 × 24 inches	36 linear inches
24 × 24 inches	24 linear inches

These representative figures are used by the official DOMINATOR polymeric sand calculator to account for the effect of paver size on consumption.

3. Enter the Joint Width

Measure the average open space between the pavers.

Common joint widths include:

1/8 inch
1/4 inch
3/8 inch
1/2 inch
3/4 inch
1 inch or wider for selected natural stone installations

Even a small increase in joint width can substantially increase the amount of sand required.

Measure several locations rather than relying on one joint. Tumbled pavers, irregular stone and older installations rarely maintain one perfectly consistent gap, because apparently even masonry refuses to cooperate with neat spreadsheets.

4. Enter the Joint Depth

Measure the usable depth that must be filled.

Polymeric sand should normally fill the joint to the minimum depth specified by the product manufacturer. It should not be applied as a thin surface layer over loose or deteriorated material.

DOMINATOR requires at least a 1-inch joint depth, while Techniseal SmartSand specifies a minimum depth of 1.5 inches.

5. Select the Bag Size

Common retail sizes include:

10 pounds
20 pounds
25 pounds
35 pounds
40 pounds
50 pounds

Enter the actual bag size you plan to purchase. Do not calculate with a 50-pound bag and then arrive home carrying 35-pound bags with confidence and absolutely no explanation.

6. Add the Price per Bag

Enter the local price to estimate the total material cost.

Use:

Estimated cost = Bags required × Price per bag

The price should match the selected:

Product
Bag size
Color
Joint-width rating
Traffic rating
Store or supplier

7. Add Extra Material

A 5% to 10% allowance is sensible for many straightforward installations.

Use a larger allowance when working with:

Irregular flagstone
Tumbled pavers
Wide or inconsistent joints
Multiple paver sizes
Curved layouts
Deep joints
Existing patios with uncertain voids
Areas requiring repeated compaction

Unused unopened bags may be returnable, depending on the retailer’s policy. Running out halfway through activation is a considerably less elegant outcome.

Polymeric Sand Calculation Formula

The simplest calculation uses the manufacturer’s coverage rating:

Bags required = Project area ÷ Square feet covered per bag

Then add your allowance:

Adjusted bags = Bags required × 1.05 to 1.10

Finally, round up:

Bags to purchase = Rounded-up adjusted quantity

Example: 400-Square-Foot Patio

Assume:

Project area: 400 sq ft
Coverage: 75 sq ft per bag
Allowance: 10%

Calculation:

400 ÷ 75 = 5.33 bags

5.33 × 1.10 = 5.87 bags

Purchase:

6 bags

Cost Example

If each bag costs $40:

6 × $40 = $240

The estimated polymeric sand material cost is $240, excluding tax, shipping, tools, cleaning products and labor.

Why Polymeric Sand Coverage Varies

Two patios with the same square footage can require very different quantities.

The main variables are:

Joint Width

Wider joints contain more volume.

A 3/4-inch joint can consume several times more material than a narrow 1/8-inch joint.

Joint Depth

Deeper pavers and fully emptied replacement joints require more material.

A thin layer placed over existing sand may appear cheaper, but manufacturers warn that proper performance requires adequate joint depth.

Paver Size

Small pavers create more joints per square foot.

Large slabs create fewer joints and generally require less jointing sand for the same surface area.

Paver Shape

Rectangular pavers are relatively easy to estimate. Irregular stone, fan patterns, circles, curved borders and tumbled edges create more variable joints.

Compaction

Dry sand settles deeper into the joints during compaction.

An estimate that ignores compaction may leave joints partially filled after the first pass.

Product Density

Different products use different aggregate gradations, polymers and packaging weights. One brand’s 40-pound bag should not automatically be assigned the same coverage as another brand’s 40-pound bag.

Polymeric Sand Coverage by Bag

The following table provides practical planning ranges. Always replace these estimates with the coverage printed on your selected product.

Bag Size	Typical Planning Coverage	Notes
10 lb	Around 20 sq ft	Product and joint dependent
35–40 lb	Around 45–80 sq ft	Common DIY retail size
50 lb, narrow joints	Around 65–85 sq ft	Typical 1/8–3/8-inch joints
50 lb, wide joints	Around 22–42 sq ft	Typical 3/4–1 1/4-inch joints
50 lb, irregular flagstone	Highly variable	Wide/deep joints can sharply reduce coverage

DOMINATOR lists approximate coverage of 20 square feet for a 10-pound bag and 80 square feet for a 40-pound bag.

Alliance Gator lists 65 to 85 square feet for a 50-pound G2 bag with narrow joints and 22 to 42 square feet for wide joints, based on 2 3/8-inch pavers.

These numbers demonstrate why a universal statement such as “one bag covers 80 square feet” is incomplete. Coverage is not a personality trait permanently assigned to the bag.

How Many Bags of Polymeric Sand Do I Need?

The table below uses official Gator G2 coverage ranges for a 50-pound bag.

Project Area	Narrow Joints: 65–85 sq ft per Bag	Wide Joints: 22–42 sq ft per Bag
50 sq ft	1 bag	2–3 bags
100 sq ft	2 bags	3–5 bags
144 sq ft	2–3 bags	4–7 bags
200 sq ft	3–4 bags	5–10 bags
300 sq ft	4–5 bags	8–14 bags
400 sq ft	5–7 bags	10–19 bags
500 sq ft	6–8 bags	12–23 bags
1,000 sq ft	12–16 bags	24–46 bags

These figures are rounded up but do not include an additional waste allowance.

The wide-joint range is intentionally broad because a 3/4-inch joint and a 1 1/4-inch joint do not consume remotely similar quantities.

How Much Polymeric Sand Do I Need for Pavers?

For standard interlocking concrete pavers, determine:

Total paved area
Average paver length and width
Joint width
Joint depth
Manufacturer coverage
Bag weight
Allowance percentage

For a fast estimate, use the product coverage method.

Example: 12 × 12-Foot Patio

Area:

12 × 12 = 144 sq ft

Using a 50-pound product covering 65 to 85 square feet:

Best coverage: 144 ÷ 85 = 1.69 bags
Lower coverage: 144 ÷ 65 = 2.22 bags

The estimated requirement is 2 to 3 bags for narrow joints.

With wide joints covering 22 to 42 square feet per bag:

144 ÷ 42 = 3.43 bags
144 ÷ 22 = 6.55 bags

The estimated requirement becomes 4 to 7 bags.

The patio size did not change. Only the joints did, because the empty space between pavers is the part consuming the product.

Polymeric Sand Calculator for Flagstone

Flagstone requires more careful estimating because the pieces and joints are rarely uniform.

Measure:

Total flagstone area
Average joint width
Widest joint
Joint depth
Percentage of unusually large gaps
Product’s permitted joint-width range

Do not assume that ordinary narrow-joint paver sand is suitable for every flagstone installation.

Alliance Gator’s Eurostone product is designed for natural stone and supports joints up to 1.5 inches wide. Its stated 50-pound coverage is approximately:

70 to 90 sq ft for narrow joints
24 to 46 sq ft for wide joints

It also requires a minimum joint depth of 1.5 inches.

For irregular flagstone:

Divide the project into several zones.
Measure representative joints in each zone.
Calculate each zone separately.
Use the widest realistic average rather than the narrowest attractive measurement.
Add at least 10% extra.

Extremely wide joints may require a different polymeric stone dust, joint compound or manufacturer-approved product.

DOMINATOR Polymeric Sand Calculator Estimates

DOMINATOR polymeric sand is sold in 10- and 40-pound sizes.

The manufacturer gives approximate coverage of:

10-pound bag: About 20 sq ft
40-pound bag: About 80 sq ft

Its standard product supports joints from 1/8 inch to 4 inches but requires at least 1 inch of joint depth.

For a 300-square-foot project using the 40-pound estimate:

300 ÷ 80 = 3.75 bags

Purchase at least:

4 bags

With a 10% allowance:

3.75 × 1.10 = 4.13

Purchase:

5 bags

Use the detailed calculator result when your joints are wider, deeper or more numerous than the manufacturer’s average coverage assumptions.

G2 Polymeric Sand Coverage

Alliance Gator SuperSand G2 is packaged in 50-pound bags.

For 2 3/8-inch-high pavers, the manufacturer lists:

Joint Type	Joint Width	Coverage per 50 lb Bag
Narrow	1/8–3/8 inch	65–85 sq ft
Wide	3/4–1 1/4 inches	22–42 sq ft

A 100-square-foot patio would therefore require approximately:

2 bags for narrow joints
3 to 5 bags for wide joints

A 400-square-foot patio would require approximately:

5 to 7 bags for narrow joints
10 to 19 bags for wide joints

Check the exact G2 product because SuperSand G2, Maxx G2 and products intended for natural stone can have different permitted applications.

Polymeric Sand Cost per Square Foot

Calculate the sand-only cost per square foot using:

Cost per sq ft = Bag price ÷ Coverage per bag

Example 1: Standard Product

Bag price: $30
Coverage: 60 sq ft

$30 ÷ 60 = $0.50 per sq ft

Example 2: Premium Product

Bag price: $89
Coverage: 80 sq ft

$89 ÷ 80 = $1.11 per sq ft

Example 3: Wide Joints

Bag price: $89
Coverage: 30 sq ft

$89 ÷ 30 = $2.97 per sq ft

Retail pricing varies substantially. Current examples range from approximately $29 for a basic 35- or 40-pound product to around $89 or more for a premium 40-pound DOMINATOR bag.

The material price per square foot can therefore range from well under $1 to several dollars when joints are wide or a premium product is selected.

These figures cover the joint sand only. They do not include:

Old sand removal
Pressure washing
Surface cleaning
Paver repairs
Compactor rental
Labor
Delivery
Joint stabilization
Sealing

Home Depot Polymeric Sand Estimates

Retail product pages are useful for checking:

Bag weight
Current price
Available color
Joint-width limits
Product availability
Manufacturer instructions

However, a retail listing may show one generalized coverage figure that does not match your paver dimensions.

For a more reliable estimate:

Find the exact product.
Record its bag weight.
Read the technical data sheet.
Identify narrow- and wide-joint coverage.
Enter the actual joint measurements into the calculator.
Round up the result.

Home Depot currently lists polymeric sand products in several bag sizes and price tiers, including basic EZ Sand products and premium wide-joint products.

Paver Joint Sand Versus Bedding Sand

Polymeric sand is a jointing material. It is not the bedding layer beneath the pavers.

Polymeric Joint Sand

Used between finished pavers to:

Fill joints
Help lock pavers together
Reduce sand washout
Discourage insect activity
Reduce some weed establishment
Improve joint stability

Bedding Sand

Used beneath pavers to:

Create a level setting bed
Allow final paver adjustment
Support uniform placement

Sakrete specifically warns that polymeric sand is not a bedding mix.

Do not use a polymeric sand calculator to estimate the bedding layer. Bedding sand is calculated by area and compacted depth, usually in cubic feet, cubic yards or tonnes.

How Much Bedding Sand for 100 Square Feet?

For a 1-inch bedding layer:

Volume = Area × Depth

Convert 1 inch to feet:

1 ÷ 12 = 0.0833 ft

Then:

100 × 0.0833 = 8.33 cu ft

Convert to cubic yards:

8.33 ÷ 27 = 0.31 yd³

With a 10% allowance:

0.31 × 1.10 = 0.34 yd³

This is bedding sand, not polymeric joint sand.

For polymeric sand over the same 100-square-foot area, a typical 50-pound estimate may be:

2 bags for narrow joints
3 to 5 bags for wide joints

Can New Polymeric Sand Be Installed Over Old Sand?

Do not simply place a thin layer of new polymeric sand over old material.

The existing joint material should generally be removed deeply enough to meet the new product’s minimum depth.

DOMINATOR instructs users to remove all old sand and warns against using its product as a capping layer. Its minimum required joint depth is 1 inch.

Techniseal’s replacement instructions require joints to be emptied before refilling and specify a minimum depth of 1.5 inches for the referenced product.

Leaving old material underneath can cause:

Poor bonding
Shallow joints
Uneven activation
Drainage problems
Early cracking
Joint erosion
Loose surface material

Follow the selected manufacturer’s instructions rather than combining different products and hoping their polymers establish diplomatic relations.

How Deep Should Polymeric Sand Be?

The required depth depends on the product.

A practical range is:

At least 1 to 1.5 inches deep

Examples:

DOMINATOR: At least 1 inch
Techniseal SmartSand: At least 1.5 inches
Alliance Eurostone: At least 1.5 inches

The finished sand level should normally remain approximately 1/8 inch below the top of the paver or below the bottom of its chamfer. Filling to the very top exposes the hardened joint to direct foot and tire wear.

Use the product’s technical data sheet as the final requirement.

Important Installation Checks

The calculator estimates quantity. It does not determine whether the installation conditions are suitable.

Before applying polymeric sand, confirm:

The Surface Is Dry

Moisture can activate the polymers while sand is still sitting on the paver surface, potentially creating residue or haze.

The Joints Are Clean

Remove loose material, weeds, debris and unsuitable existing sand.

The Base Drains Properly

Polymeric sand should not be used to hide standing-water or base-drainage problems.

The Weather Meets Product Requirements

Rain-free time and minimum temperature vary by manufacturer.

DOMINATOR requires dry conditions, no rain forecast for at least 24 hours and temperatures above 50°F around installation. Techniseal SmartSand specifies dry joints and recommends 24 hours without rain for optimal curing.

The Surface Is Compacted Correctly

Compaction settles the material and removes voids. Some products require mechanical compaction, while products designed for delicate slabs may use different methods.

Excess Sand Is Removed Before Watering

Loose polymeric dust left on the surface can bond to the pavers when activated.

Always follow the instructions printed for the exact product being installed.

Frequently Asked Questions

How many square feet does a 50 lb bag of polymeric sand cover?

A 50-pound bag commonly covers approximately:

65 to 85 sq ft with narrow joints
22 to 42 sq ft with wide joints

These figures are based on Alliance Gator SuperSand G2 over 2 3/8-inch pavers. Coverage changes with paver size, depth, joint width and product density.

Do not use one fixed coverage figure for every project.

How do you calculate the amount of polymeric sand needed?

Use:

Bags needed = Total area ÷ Coverage per bag

Add 5% to 10%:

Adjusted bags = Bags needed × 1.05 to 1.10

Round up to the next whole bag.

For greater accuracy, enter the paver size, joint width, joint depth and actual bag size into the calculator.

How much paver sand is needed for 100 sq ft?

For polymeric joint sand, approximately:

2 50-pound bags for narrow joints
3 to 5 bags for wide joints

For a 1-inch bedding-sand layer beneath the pavers, 100 square feet requires approximately 0.31 cubic yard, or around 0.34 cubic yard with 10% extra.

The two materials perform different jobs and should not be calculated interchangeably.

How many square feet does G2 polymeric sand cover?

A 50-pound bag of Gator SuperSand G2 covers approximately:

65 to 85 sq ft with 1/8–3/8-inch joints
22 to 42 sq ft with 3/4–1 1/4-inch joints

The published estimate assumes 2 3/8-inch pavers.

Can I put new polymeric sand over old polymeric sand?

Generally, no.

Remove the old joint material deeply enough to meet the minimum installation depth of the new product. Manufacturers warn that shallow capping can produce unreliable bonding and drainage.

How many bags of sand do I need for a 12 × 12 patio?

A 12 × 12 patio covers:

144 sq ft

For 50-pound polymeric sand:

Narrow joints: Approximately 2 to 3 bags
Wide joints: Approximately 4 to 7 bags

Add extra material when the pavers are small, tumbled or irregular.

If you mean bedding sand rather than joint sand, calculate it separately by depth.

How deep should polymeric sand be?

Most products require at least 1 to 1.5 inches of usable joint depth.

DOMINATOR requires at least 1 inch, while several Techniseal and Alliance Gator products specify 1.5 inches.

Keep the final level roughly 1/8 inch below the paver surface or chamfer.

How much area will a 50 lb bag of sand cover?

For polymeric joint sand, a realistic range is approximately 22 to 85 square feet, depending mainly on joint width.

Regular sand used for bedding or general construction has a different coverage calculation based on layer depth and material density.

What does a 20 × 20 paver patio cost?

A 20 × 20 patio covers:

400 sq ft

Basic concrete-paver installation may cost approximately $8 to $15 per square foot, giving a preliminary range of:

$3,200 to $6,000

Premium professionally installed projects with extensive excavation, base preparation, drainage, complex patterns or higher-end pavers may reach $30 to $40 per square foot, or approximately:

$12,000 to $16,000

The polymeric sand is only a small part of the total. Pavers, excavation, aggregate base, bedding sand, edge restraint, cutting and labor usually account for most of the cost.

How much does polymeric sand cost?

Common retail bags can cost approximately $25 to more than $90, depending on bag weight, brand, color and performance rating. Current examples include basic products near $30 and premium 40-pound products near $89.

Use the local bag price in the calculator rather than relying on a national average.

Does polymeric sand stop weeds permanently?

No.

Polymeric sand can make joints more resistant to weed establishment, erosion and insect disturbance, but it does not guarantee that weeds will never appear. Organic debris can collect on top of the joints and allow new seeds to grow.

Is polymeric sand suitable for driveways?

Selected products are rated for vehicular applications, but the paver system must have a properly designed base, drainage, edge restraint and interlocking layout.

Check the product’s traffic rating and joint-width limits before using it on a driveway.

Should polymeric sand be level with the pavers?

No.

The finished joint should generally sit approximately 1/8 inch below the paver surface or the bottom of the chamfer.

Do I need to compact polymeric sand?

Most standard paver installations require compaction to settle sand deeply into the joints and remove voids. Techniseal states that mechanical compaction is mandatory for SmartSand.

Follow the selected product’s instructions, especially for porcelain, natural stone or delicate slabs.

Final Estimate Checklist

Before purchasing polymeric sand, confirm:

Total project square footage
Paver length and width
Average joint width
Maximum joint width
Usable joint depth
Selected product
Permitted paver material
Traffic rating
Bag weight
Manufacturer coverage
Local price per bag
Waste allowance
Existing sand-removal depth
Weather and curing requirements

The calculator provides an estimating result. The product’s current technical data sheet remains the final source for coverage, joint limits, activation and installation requirements.

Professional Polymeric Sand Estimator

Polymeric Sand Calculator: Estimate Bags, Coverage and Cost

Quick Answer