Artificial Turf Base Calculator: Base Depth & Tons
Use about 3 to 4 in of compacted crushed base for light-duty turf, about 4 to 6 in for many patios and play areas, and around 6 in or more for poorer soil or heavier traffic. Short orders cause low spots, soft edges, and extra delivery charges. This guide shows how to pick base depth, convert area and depth into cubic yards and tons, and order enough material without shorting the job.
What this artificial turf base calculator estimates
This calculator estimates turf area, excavation volume, compacted base volume, and delivery quantities for base, infill, and turf rolls. It also applies waste for cuts and seams, then adds a compaction allowance so the ordered material matches the installed job more closely.
What goes into the order
The order starts with area, then depth, then a compaction buffer. For turf itself, roll width and waste factor control how many linear feet to buy. For infill, the calculator uses an infill rate in pounds per square foot, with a typical planning range of 1.0 to 2.0 lbs/sq ft.
The ordering logic matters because turf installs usually lose volume during grading and plate compaction. If the subgrade is soft, uneven, or full of low spots, the excavation and base order should include extra allowance so the finished surface does not settle below grade.
Formula overview
Base volume in cubic yards is:
Area × Depth ÷ 27
Then the calculator adds a compaction allowance. For this guide, the calculation uses a 15% compaction allowance for sub-base volume.
Synthetic turf systems require a stable, well-draining aggregate sub-base of 3 to 4 inches.
What base should I use for artificial turf?
Use a compactable, well-draining crushed aggregate base for artificial turf. Class II road base is a common choice because it is a highly compactable aggregate of crushed rock and is listed by some suppliers as a turf subbase material. The goal is a stable layer that drains well and resists ruts and settlement.
Why the base choice changes
The best base depends on drainage, traffic, and the subgrade below it. A dry, firm residential lawn can often use a thinner crushed base than a pet run or a heavily used play area. Soft or clay-heavy soil needs more base and more attention to drainage and edge support.
Some systems also use weed barrier fabric below the turf. It is a lightweight geotextile that is water permeable, so it can help separate layers without trapping water. It is not a fix for poor grading or a weak base.
Base material options
- Class II road base: crushed rock aggregate used for turf subbases.
- Other compactable crushed aggregate: acceptable when it drains and locks under compaction.
- Open-drain stone mixes: useful when drainage is the main concern, subject to project conditions.
How deep should an artificial turf base be?
For most turf work, a compacted base depth of 3 to 4 in is the practical target. Three inches is usually enough for firm soil and light residential use. Four inches is safer where traffic is heavier, drainage is weaker, or the finished surface must stay flatter over time.
When 3 in is enough
Three inches can work for a residential lawn replacement on stable subgrade, with decent drainage and limited foot traffic. It also fits projects where the turf is mainly for appearance and light use, not repeated impact or turning loads.
When 4 in is safer
Four inches is the better starting point for pet areas, active kids, and any job where the base must resist rutting. It is also safer when the subgrade has soft spots, the grade varies, or the install includes seams and curves that make hand shaping harder.
Rooftop or overlay projects
Rooftop or overlay conditions need special review because the structure, drainage path, and edge details can control the build-up more than the turf itself. Those projects often use different layers, and the base depth should be checked against the assembly above and below it rather than copied from a yard install.
| Project type | Typical base depth | Ordering note |
|---|---|---|
| Residential lawn | 3 in | Use on firm soil with light foot traffic. |
| Pet area | 4 in | Choose the safer depth for frequent use and wash-down drainage. |
| Putting green | 3 to 4 in | Favor flatness and consistent compaction over loose fill. |
| Rooftop or overlay | Special review | Check structure, drainage, and assembly limits before ordering. |
How do you calculate artificial turf base quantity?
Calculate base quantity by multiplying area by depth, then dividing by 27 to convert cubic feet to cubic yards. After that, add a compaction allowance. For this guide, the calculator uses a 15% compaction allowance for sub-base volume, then converts the adjusted cubic yards to tons.
Step 1: find cubic yards
Formula: area in sq ft × depth in ft ÷ 27 = cubic yards
If the project is about 600 sq ft and the base depth is around 3 in, the raw volume is roughly 5.6 cubic yards before any allowance.
Step 2: add compaction allowance
Compaction changes the final amount because crushed aggregate tightens under plate compaction. Using the compaction allowance, the order comes out to roughly 5.56 × 1.15, or about 6.4 cubic yards. That is the delivery quantity, not the final in-place loose pile.
Step 3: convert cubic yards to short tons
For planning, this guide uses about 1.35 tons per cubic yard. That makes 6.39 × 1.35 = 8.63 short tons. One worked example in the calculator orders 7.03 cubic yards of base and converts that to 9.49 tons.
| Calculation step | Example value | Result |
|---|---|---|
| Area | 600 sq ft | — |
| Depth | 3 in | 0.25 ft |
| Raw volume | 600 × 0.25 ÷ 27 | 5.56 cubic yards |
| With 15% compaction allowance | 5.56 × 1.15 | 6.39 cubic yards |
| Converted to tons | 6.39 × 1.35 | 8.63 short tons |
What is turf base?
Turf base is the compacted aggregate sub-base beneath artificial turf. It must drain well and resist ruts and settlement. In most installs, it is a crushed stone or road base layer that creates a flat, stable platform for turf, seams, and infill.
Why the base matters
If the base drains poorly, water can pond under the turf. If it compacts unevenly, edges can drop and seams can telegraph. Low spots, soft subgrade, and weak edge restraint are common failure points because the turf skin follows whatever is underneath it.
Common supporting layers
- Compacted aggregate sub-base
- Weed barrier fabric in some systems
- Edging such as bender board or mow strip
- Infill to help weigh the turf down and hold blade position
Project-type base depth and ordering checklist
Use project type first, then adjust for soil and drainage. The safest ordering method is to pick the target depth, add the compaction buffer, and then add a small waste allowance for grading losses and shaping around edges.
Residential lawn checklist
- Confirm firm, well-draining subgrade.
- Choose 3 in of compacted base for light use.
- Add the 15% compaction allowance to the order.
- Include extra base where grading must fill low spots.
Pet run checklist
- Use 4 in when urine wash-down and traffic are frequent.
- Check slope so water exits the area.
- Review edge restraint before ordering base.
- Add allowance for soft patches and cleanup access.
Putting green checklist
- Prioritize flatness and uniform compaction.
- Use 3 to 4 in depending on the subgrade.
- Keep seams, cups, and transitions in the layout plan.
- Order enough base to correct small grade deviations.
Soft soil, edge restraint, and drainage checks
If the soil is soft, a 3 in build can settle too easily. If the perimeter lacks solid restraint, the base can creep outward and leave a dropped edge. If drainage is weak, even a correct depth can fail because water softens the subgrade and weakens compaction.
How many tons of base do I need for artificial turf
Convert the compacted base volume to short tons after adding compaction allowance. A practical planning factor is 1.35 tons per cubic yard. That gives a delivery number that is easier to order than cubic feet, and it helps compare pallet, dump, or bulk pricing.
Truckload and bag planning
For bulk delivery, divide the total tons by the supplier’s truck capacity. For bagged material, divide the required tons by the bag yield. Because bag sizes vary, the safe method is to use the labeled yield on the package rather than a guessed conversion.
Small jobs may use bags, but turf base is often easier and cheaper in bulk once the area is large enough. The calculator’s purpose is to convert square footage into order quantities that match the delivery method, not just the finished depth.
What else should be ordered with turf base?
Base is only part of the material list. Turf ordering also needs infill, seam allowance, roll width planning, waste for curves, and sometimes weed barrier fabric and edging. The calculator keeps these separate so turf-only pricing does not get mixed with base quantities.
Infill, roll width, and waste
Infill density is shown at 1.0 to 2.0 pounds per square foot, and the example uses 1.5 pounds per square foot. Turf roll width is assumed at 15 feet, which affects how many linear feet are needed from the total area. The calculator recommends a 10% waste factor for cuts and seaming, and allows 15% waste for curved borders.
Roll width matters because a 15-foot roll can reduce seam count on some layouts, while narrow runs can create more trimming waste. Curves and grain direction also increase waste, so straight rectangles should not be ordered the same way as rounded or irregular spaces.
Weed barrier fabric and edging
Weed barrier fabric is described as a lightweight geotextile that is water permeable. It may help in some systems, but it should not replace a proper base or drainage plan. Edging, including bender board or mow strip options, helps hold the perimeter and reduce settlement at the edges.
Frequently asked questions
How much base for artificial turf
Most projects use a compacted base depth of 3 to 4 in. A firm residential lawn can often use 3 in, while pet areas, softer soil, and more active use usually need 4 in or more. The right amount depends on drainage, traffic, and how flat the finished surface must stay.
What base to use for artificial turf
Use a compactable crushed aggregate base that drains well and resists settlement. Class II road base is a common choice because it is a highly compactable crushed rock aggregate. The best pick still depends on subgrade strength, drainage, and whether the project needs extra shaping or edge support.
What base to use for artificial grass
Artificial grass uses the same type of base as artificial turf: a stable, well-draining compacted aggregate sub-base. For many installs, Class II road base or similar crushed aggregate is suitable. The base should be graded smoothly before turf goes down so low spots do not telegraph through.
How to make a base for artificial grass
Excavate to the planned depth, shape the subgrade for drainage, place the crushed base in lifts, and compact each lift until the surface is firm and even. Then check edges, corrections for low spots, and any fabric or edging layer before turf installation begins.
How to prepare the base for artificial grass
Preparation starts with drainage and grading. Remove soft material, set edge restraint, install weed barrier fabric if the system calls for it, and place compacted aggregate to the target depth. Finish with a smooth, stable plane so seams, infill, and turf backing sit evenly.
How many tons of base do I need for artificial turf
Convert cubic yards to short tons after adding compaction allowance. This guide uses 1.35 tons per cubic yard, and the calculator applies a 15% compaction allowance. For the worked example, 7.03 cubic yards converts to 9.49 tons, which is the kind of number useful for ordering delivery.