What total budget are you planning for the whole project?
Angi's 2026 benchmark for the pool alone is $44,499 to $87,349.
No votes yet. Yours will be the first. · saved on this device
Pool Plan Compass · Cost calculator
Inground pool cost calculator
Enter the pool's surface area in square feet, choose vinyl, fiberglass or gunite, set the site complexity and toggle add-ons. The calculator scales Angi's 2026 benchmark of $65,909 for a typical inground pool and HomeAdvisor's $50 to $125 per square foot range into a planning estimate.
Skip to the calculatorBase rates are anchored to: Angi, How Much Does It Cost to Install a Pool (2026); HomeAdvisor, How Much Does It Cost to Build a Pool (2026); HomeAdvisor, How Much Does It Cost to Build a Pool (2026); HomeAdvisor, How Much Does It Cost to Build a Pool (2026); Fixr, Pool Fence Cost (2025); Fixr, Swimming Pool Cost (2024).
By the numbers
Cost benchmarks behind the calculator
$65,909
Typical U.S. inground pool costs $65,909, with most projects $44,499 to $87,349
Angi's cost guide, updated August 2026, is the benchmark behind this site's calculator. It is an inground pool reference, not a spa-only or water-feature price, and decking, barriers, excavation assumptions and landscaping must be confirmed in the proposal.
Angi, How Much Does It Cost to Install a Pool (2026)$41,835
Inground pools average $41,835; most projects run $25,002–$58,866
HomeAdvisor's 2026 cost guide puts in-ground pools at $44,300–$86,500 fully installed and $50–$125 per square foot. These figures exclude decking, fencing and landscaping, which can add tens of thousands.
HomeAdvisor, How Much Does It Cost to Build a Pool (2026)$65,000–$120,000
Gunite $65k–$120k, fiberglass $25k–$60k, vinyl $20k–$40k installed
HomeAdvisor's 2026 material breakdown shows concrete costs two to three times a vinyl-liner pool up front. Concrete buys unlimited shape freedom; fiberglass and vinyl buy lower cost and faster installation.
HomeAdvisor, How Much Does It Cost to Build a Pool (2026)$2,000–$35,000
Adding a hot tub or spa to a new pool project costs $2,000–$35,000
HomeAdvisor lists the attached spa as one of the widest-ranging add-ons, alongside heaters at $1,800–$4,000 and covers at $800–$2,600. A raised spillover spa built in gunite sits at the top of that range.
HomeAdvisor, How Much Does It Cost to Build a Pool (2026)Pool pricing is mostly area times a rate, adjusted for shell and site, plus a list of add-ons that each carry their own range. That structure is what the calculator reproduces. The base rate of $130 per square foot puts a 450 square foot fiberglass pool at about $58,500, between HomeAdvisor's $41,835 average and Angi's $65,909 benchmark, and the shell multipliers follow HomeAdvisor's 2026 material table of $65,000–$120,000 for gunite against fiberglass and vinyl.
The add-ons are priced from the same guides: an attached spa from HomeAdvisor's $2,000–$35,000 range, a fence from Fixr's $6,500 average, an automatic cover from Thursday Pools' and River Pools' 2026 ranges. Everything is national. Read the assumptions under the result before you use the number.
How is the surface area measured, and what size should you enter?
Surface area is length times width for a rectangle, and roughly 80% of the bounding rectangle for a freeform shape. A 15 by 30 pool is 450 square feet; a 16 by 32 is 512; a 20 by 40 is 800. Most residential pools fall between 350 and 650 square feet. Depth affects cost too, but less than area, because the deep end is a fraction of the floor and the walls are priced with the shell. If you are unsure, enter 450 and see how the add-ons move the total.
The calculator does not price the deck by area separately; it assumes a basic concrete surround in the base rate, consistent with Angi's benchmark, and offers an upgraded deck as an add-on. For a detailed deck estimate use Concrete Network's $6–$18+ per sq ft and River Pools' $10 to $50 per square foot ranges on the decking page.
What do the shell tiers and complexity levels represent?
Vinyl liner is the low tier at about 65% of the mid-grade rate, reflecting HomeAdvisor's $20,000 to $40,000 range. Fiberglass is the mid tier at the base rate. Gunite is the high tier at roughly 145% of base, reflecting its $65,000 to $120,000 range and the longer build River Pools describes as 2–6 weeks vs 3–6 months. These are national medians; a plain gunite rectangle in a low-cost market can undercut a premium fiberglass shell.
Complexity covers the site. Simple is a flat lot with 12 feet of equipment access and diggable soil. Moderate adds some grade, a tighter gate or a longer utility run. Difficult covers slopes needing retaining walls, rock, a high water table, or crane-only access. Today's Homeowner's state ranges show the effect: $59,000–$140,000, with terrain and soil a large part of the gap.
Which add-ons matter most, and which are usually required?
The barrier fence is usually not optional; most jurisdictions require it for the final inspection. The heater decides whether you swim in April or June and, per EIA's 2024 survey, 60.06% of U.S. pool homes report an unheated pool, so plenty of owners skip it in warm climates; among those that heat, natural gas (15.8% of pool homes) edges out electricity (13.3%). The automatic cover is the most-skipped item that owners later wish they had, because it cuts evaporation, heating cost and debris in one purchase.
The spa is the largest add-on and the one most worth deciding before proposals, since it changes the shell design. Salt and LED lighting are small and easy to add at build. Use the comparison pages for salt versus chlorine and gas versus heat pump before you toggle them here.
| Add-on | Calculator figure | Source range |
|---|---|---|
| Attached spa | $15,000 | $2,000 to $35,000 (HomeAdvisor 2026) |
| Heater | $3,500 | $1,800 to $4,000 (HomeAdvisor 2026) |
| Automatic safety cover | $14,000 | $8,000 to $20,000 (Thursday Pools 2026); $14,000 to $21,000 (River Pools) |
| Barrier fence | $6,500 | Average (Fixr 2025) |
| Saltwater system | $1,800 | $1,008 to $2,620 (Fixr 2024) |
| LED lighting package | $1,500 | $1,000 to $2,000 (Fixr 2024) |
How does the timeline estimate work?
The calculator returns working days scaled by area and complexity, calibrated so a 450 square foot moderate-complexity pool lands around 55 working days, inside HomeAdvisor's one to two months of construction after excavation. It does not include the 2 to 6 weeks of permitting or the cure period on gunite, which River Pools' 3 to 6 month concrete timeline does include. Add both when you plan the swim date.
Fiberglass builds compress the construction days but not the permit; vinyl sits between. Winter in freeze climates stops the clock entirely. The regional notes cover the calendar by region.
Homeowner polls
What other homeowners budgeted
Which shell type are you leaning toward?
No votes yet. Yours will be the first. · saved on this device
Cost calculator questions
Why is my calculator result lower than the proposal I received?
Usually because the proposal includes items the calculator treats as add-ons or excludes: an upgraded deck, a retaining wall, a long electrical run, landscaping, or a premium interior finish. Compare line by line. If the shell and equipment alone exceed the calculator's high end by a wide margin, ask the builder what site condition explains it.
Does the calculator include the deck?
A basic concrete surround is assumed in the base rate, consistent with the Angi benchmark. Travertine, pavers or a large patio are not, and can add $10,000 to $30,000 on a 900 square foot surround at Concrete Network's and River Pools' per-square-foot ranges. Price the deck separately using the decking page.
How should I enter a freeform pool?
Multiply the longest length by the widest width and take about 80% of that. A freeform that fits in a 20 by 36 rectangle is roughly 575 square feet. Gunite is the usual shell for freeform shapes; fiberglass freeforms are limited to the manufacturer's molds.
Is a heat pump or a gas heater assumed?
Neither specifically; the heater add-on is a single figure of $3,500 inside HomeAdvisor's $1,800 to $4,000 range. Heat pumps generally cost more to buy and less to run; gas heats faster. The gas versus heat pump comparison page covers the operating math, which matters more than the purchase price over ten years.
Why is gunite priced so much higher than fiberglass?
More labor and more stages: excavation to an exact shape, steel, shotcrete, a cure, tile, coping and plaster, each a separate crew. HomeAdvisor's 2026 table puts gunite at $65,000 to $120,000 against fiberglass at $25,000 to $60,000. Gunite buys any shape and an integrated spa; fiberglass buys speed and a smoother, lower-chemical surface.
Does complexity change the timeline?
Yes, the working-day estimate scales with the complexity setting. A difficult site with retaining walls or dewatering adds days to excavation and shell work. It does not change the permit window, which depends on your jurisdiction, or the gunite cure period.
Can I use the calculator for a spa-only project?
No. Spa pricing is by unit, not by area, and the ranges are on the spa and hot tub page: $2,000 to $11,000 for a portable unit and $5,000 to $25,000 in-ground per HomeAdvisor. Use the attached-spa add-on here only when the spa is part of a new pool.
More free tools
Free toolPool and spa comparisons, decided by your conditionsSide-by-side tables for the decisions that change the price most.
Free toolPool planning quiz: nine things to know before the first site visit9 questions that show what you already know and what to check next.
Free toolPool planning pollsSee what other planners chose and add your vote.
Price a specific service
Service guideCustom Pool Design & BuildCustom pool design and build covers everything from the site plan to first swim: excavation, the shell in gunite, fiberglass or vinyl, equipment and plumbing, electrical and bonding, the barrier, startup and training.
Service guideSpa & Hot Tub InstallationSpa and hot tub installation covers the base, the delivery route, the dedicated electrical circuit with GFCI protection, drainage around the unit, and the cover and access arrangement that make it usable every week.
Service guideWater Features & WaterfallsWater features add sound and motion to a pool through sheer descents, bubblers, deck jets, scuppers, spillover spas or rock waterfalls.
Service guidePool Decking & CopingPool decking and coping form the transition from water to yard: the coping caps the bond beam and the deck carries foot traffic and sheds water.
Ready to price your pool and spa construction?
Tell us the size, the condition of what is there now, and what you want to change. Pool Plan Compass passes your request to independent local professionals, who reply with written, no-obligation estimates. The service is free to use.