All driveway calculators & tools
Every estimation tool on this site, in one organized directory โ all free, all running in your browser, all storing nothing on our servers. The flagship driveway calculator carries the whole toolchain on one page; the sections below organize its features into the three jobs they do โ estimating the gravel, comparing the materials, and getting the result where it needs to go.
The Driveway Calculator
One page, one engine, three area shapes, two independent gravel layers. Pick your shape โ rectangle, circle, or triangle โ choose your base material from the 7 well-graded options, your top material from the 7 decorative options, set depths, and the calculator applies compacted densities per ASTM D448 to give you cubic yards, US tons (or metric tonnes), bag counts, and material cost โ with 10% waste already on the total.
It is deliberately opinionated about density. The calculator uses compacted densities only โ a fundamental difference from every other gravel estimator that incorrectly uses loose density and understates your material needs by 10โ15%. Every formula is printed next to the results: Volume = Area ร Depth รท 324, Weight = Volume ร Compacted Density, Tonnage = Weight รท 2000. Every calculation is also encoded into the page URL, so the link you text to a partner reopens with your exact inputs loaded.
You get, per run
- โCubic yards & cubic meters
- โUS tons & metric tonnes
- โBag counts (small, medium, bulk)
- โSeparate base & top layer totals
- โFive-material cost comparison
- โCompacted densities (not loose)
- โShape calculator (rectangle/circle/triangle)
- โSave / share / print results
๐งฎTwo-layer gravel estimator
Turn a driveway area into cubic yards, compacted tonnage, and bag counts โ with independent base and top layer selection.
Every wrong driveway purchase starts as an estimating error, so this is the layer the site invests in most. The flagship calculator accepts three area shapes (rectangle, circle, triangle), two independent gravel layers, and applies compacted densities per ASTM D448. Choose a base layer of ABC/CA6 at 4 inches and a top layer of #57 at 2 inches, and get separate volume and weight for each layer plus a combined total โ with 10% waste applied automatically.
The most critical choice on every estimate is which gravel goes where, and the calculator handles it natively. The Base Layer dropdown offers load-bearing materials (ABC, CA6, #4 crushed stone, recycled concrete, crushed limestone) that compact to a hard surface. The Top Layer dropdown offers decorative materials (#57, #8, pea gravel, river rock, DG, lava rock) that wear under tire contact. No mixing the two โ they are calculated separately and compacted separately, just like a professional installation.
Every gravel type carries its own compacted density: 140 lbs/ftยณ for ABC, 160 lbs/ftยณ for #57, 108 lbs/ftยณ for pea gravel, 95 lbs/ftยณ for river rock. These densities determine how many US tons your driveway actually weighs โ the number that matters to the dump truck driver and the aggregate yard. The calculator also shows metric tonnes, cubic meters, and bag counts (0.5 cu ft small, 1 cu ft medium, 0.5 cu yd bulk) for any delivery method.
Area calculator (3 shapes)
Rectangle (LรW), circle (ฯrยฒ), triangle (0.5รbaseรheight). Turnarounds are circles, flares are triangles, most driveways are rectangles.
Two independent gravel layers
Base layer: ABC/CA6/#4 (4 inches standard). Top layer: #57/pea gravel/river rock (2 inches standard). Each gets its own material dropdown and compacted density.
Compacted tonnage per ASTM D448
Volume ร compacted density = weight in pounds รท 2000 = US tons. The calculator also shows metric tonnes and kg. No loose density โ ever.
10% waste applied to total
Covers compaction settling, spillage, thin spots after rain, and supplier rounding up to full cubic yards. Adjust to 15% for sloped driveways.
โ๏ธFive-material cost comparison
Compare gravel, asphalt, concrete, interlocking pavers, and stamped concrete side by side with installed cost ranges and expected lifespan.
Gravel is cheapest upfront at $1.25โ$4.50/sq ft installed, but costs more per year over 30 years than concrete because of regrading ($200โ$500 every 3โ5 years) and full top-up ($1.50โ$2.50/sq ft every 10โ15 years). The five-panel comparison shows all ranges at once โ low, mid, high install cost, and expected lifespan โ so you can annualize and see which material is actually cheap long-term.
Asphalt ($3.50โ$8.00/sq ft, 15โ30 year lifespan) is smooth, dark, and pliable in cold weather, but needs resealing every 3โ5 years ($0.50โ$1.00/sq ft). Concrete ($4.50โ$10.00/sq ft, 30โ50 year lifespan) is the longest-lasting material with minimal maintenance, but hard and cold in winter. Pavers ($6.00โ$15.00/sq ft, 25โ50+ years) have the highest curb appeal and zero maintenance, but the slowest installation. Stamped concrete ($7.00โ$18.00/sq ft, 25โ45 years) bridges the gap โ concrete patterned to look like stone or brick.
The comparison panel updates live as you change the driveway area. A 20ร40 ft rectangular driveway (800 sq ft) shows gravel at $1,000โ$3,600 total, asphalt at $2,800โ$6,400, concrete at $3,600โ$8,000, pavers at $4,800โ$12,000, and stamped at $5,600โ$14,400. Same area, same assumptions, zero cherry-picking. Each material also shows its typical install depth โ 6 inches for gravel, 4 for asphalt, 5 for concrete, 7 for pavers โ so you can sanity-check against your quote.
Gravel comparison
$1.25โ$4.50/sq ft installed, 8โ15 year lifespan. Cheapest upfront, highest annual maintenance cost.
Asphalt comparison
$3.50โ$8.00/sq ft, 15โ30 years. Smooth, pliable, dark โ reseal every 3โ5 years.
Concrete comparison
$4.50โ$10.00/sq ft, 30โ50 years. Longest lifespan, lowest annualized cost over 30 years.
Pavers & stamped concrete
$6.00โ$18.00/sq ft, 25โ50+ years. Pavers = highest curb appeal, zero maintenance. Stamped = concrete aesthetics.
โ๏ธWorkflow & output tools
The unglamorous features that decide whether an estimate survives contact with a real dump truck and aggregate yard.
Estimates get used at aggregate yard counters, on property survey stakes, and in pickup truck beds โ not ideal lighting with a spreadsheet open. So the calculator keeps both unit systems live at once: switching Imperial to Metric converts every input and output in sync, including gravel densities (lbs/ftยณ โ kg/mยณ), volume (cu yd โ mยณ), weight (US tons โ metric tonnes), and price per unit.
Results can be saved to your browser's local storage for project files, reset in one click, or encoded into the page URL. A share link carries your exact inputs โ shape, dimensions, base material, base depth, top material, top depth, waste percentage โ so the same numbers reopen on any device, and nobody re-types a gravel density from memory. Saved results never leave your browser and you clear them with one click.
The calculator also reports every intermediate value: base volume and tonnage, top volume and tonnage, total volume and tonnage, bag counts, cost per layer, and the five-material comparison. This transparency is deliberate โ an estimate you can audit beats a number you have to trust. The formulas are printed next to the results they produce: Volume = Area ร Depth รท 324, Weight = Volume ร Compacted Density, Cost = Volume ร Price per cu yd.
US & metric in sync
One switch converts every input and output โ densities, volumes, weights, prices โ between Imperial and Metric systems.
Save, reset & print
Saved results live in your browser's local storage only โ nothing uploads, nothing syncs, and clearing them takes one click. Print a clean copy.
Shareable result links
Every calculation encodes into the page URL. Text it to a partner or hand it to the aggregate yard staff โ the link reopens with your exact inputs loaded.
Three shapes, side by side
All three shapes feed the same engine but answer different questions. Pick by what you actually need to calculate โ a straight approach, a turnaround, or a flare at the street.
| Aspect | โฌ Rectangle | โฏ Circle | โณ Triangle |
|---|---|---|---|
| What you calculate | Length ร Width โ the default for 90% of driveways | ฯ ร radiusยฒ โ turnarounds at the end of long drives | 0.5 ร base ร height โ flares at the street connecting approach to road |
| Key formula | Area = L ร W | Area = ฯ ร rยฒ (or ฯ ร (width รท 2)ยฒ) | Area = 0.5 ร base ร height |
| Best for | Standard straight driveways, two-car parallel parking | Turnarounds for rural drives, RV pads, dead-end streets | Street flares, angled approaches, driveway widening at curb |
| Typical dimensions | 20ร40 ft (two-car), 12ร25 ft (single-car comfortable) | 15 ft radius (single-car turnaround = 706 sq ft) | 10 ft base ร 12 ft height = 60 sq ft flare |
Same 10% waste, four very different deliveries
Rectangle, circle, triangle, long rural โ shape changes area, area changes volume, volume changes tonnage, and tonnage determines your truck size. Every row below uses 4 inches ABC base at 140 lbs/ftยณ and 2 inches #57 top at 160 lbs/ftยณ with 10% waste.
| Shape | Dimensions | Area | Base (ABC) | Top (#57) | Total + 10% |
|---|---|---|---|---|---|
| Rectangle | 20 ร 40 ft | 800 sq ft | 9.87 cu yd / 18.65 tons | 4.95 cu yd / 10.69 tons | 16.31 cu yd / 32.2 tons |
| Circle (turnaround) | 30 ft diameter | 706.9 sq ft | 8.73 cu yd / 16.5 tons | 4.37 cu yd / 9.44 tons | 14.42 cu yd / 28.4 tons |
| Triangle (flare) | 10 ร 12 ft | 60 sq ft | 0.74 cu yd / 1.4 tons | 0.37 cu yd / 0.8 tons | 1.22 cu yd / 2.4 tons |
| Rectangle | 12 ร 100 ft (long rural) | 1,200 sq ft | 14.81 cu yd / 27.98 tons | 7.41 cu yd / 16.03 tons | 24.4 cu yd / 48.4 tons |
Where the toolchain earns its keep
Six situations where guessing wrong costs real money โ and where the compacted-density formulas and two-layer system pay for themselves the first time you use them.
๐ New two-car gravel driveway
Rectangle shape at 20ร40 ft = 800 sq ft. 4 inches ABC base (9.87 cu yd, 18.65 tons) + 2 inches #57 top (4.95 cu yd, 10.69 tons). 10% waste = 16.31 cu yd, 32.2 total tons for one tandem-axle delivery.
๐๏ธContractor bid verification
A quoted $3,200 for 15 cu yd of gravel at $40/cu yd โ run the calculator: 800 sq ft, 6 inches total, ABC at $20 + #57 at $40 = $197.40 material cost. Is the $3,000+ install markup reasonable? Now you know where the number comes from.
๐RV driveway with geotextile
Large/RV preset at 20ร100 ft = 2,000 sq ft. 6 inches ABC base (37.04 cu yd) + 2 inches DG top (18.52 cu yd) = 55.56 cu yd, 102.8 tons with waste. Geotextile = 2,000 sq ft at $1.00/sq ft = $2,000 added. Need tri-axle delivery or two tandem trips.
๐ฒSloped rural long driveway
12ร100 ft rectangle + 30 ft circle turnaround + 10ร12 ft triangle flare = 1,966.9 sq ft total. 15% waste (sloped) instead of 10%. 4 inches ABC + 2 inches pea gravel = 48.4 cu yd, 87.1 tons.
๐ฐMaterial selection budget
800 sq ft driveway. Gravel $1,000โ$3,600, asphalt $2,800โ$6,400, concrete $3,600โ$8,000, pavers $4,800โ$12,000. The five-panel comparison instantly shows whether the $2,600 asphalt premium is worth it over 30 years of less maintenance.
๐ ๏ธOld driveway removal + replacement
Toggle 'Additional Work Costs' to include old asphalt removal ($1,200 at $1.50/sq ft), permit ($150), site prep ($500), grading ($400), drainage ($500). Your 'gravel driveway' total is now $1,000 + $3,750 extras = $4,750 โ the real project number.
How a run works, start to delivery
The toolchain is designed as one pass, not a quiz. Five steps, about two minutes.
- 1
Pick a shape and size
Three area shapes โ rectangle, circle, triangle โ with common size presets (single-car, two-car, long driveway, RV) that auto-fill dimensions, or type your own.
- 2
Choose two gravel layers
Base layer dropdown (ABC/CA6/Crushed Limestone/#4/Recycled Concrete) and Top layer dropdown (#57/#8/Pea Gravel/River Rock/DG). Each with its own compacted density from ASTM D448.
- 3
Set depths and waste
Base layer depth: 4 inches standard, 6 for RV/clay soil. Top layer depth: 2 inches standard. Waste factor: 10% default, 15% for sloped, 20% for extra touch-up material.
- 4
Review volumes, weights, and cost
Base volume and tonnage, top volume and tonnage, total with waste, bag counts, material cost per layer โ every intermediate number is there to audit.
- 5
Compare all five materials
The comparison panel shows gravel, asphalt, concrete, pavers, and stamped concrete โ all installed cost side-by-side with low/mid/high ranges and expected lifespan.
On the drawing board
Each of these becomes a standalone tool once its math is verified against aggregate industry standards and real delivery logistics. Current candidates, in the order contractors and DIYers keep asking for them:
๐งตGeotextile & fabric estimatorComing soon
Calculate fabric square footage with overlaps and seam allowances โ woven vs non-woven types and per-sq-ft pricing.
๐Delivery truck matchingComing soon
Match total tonnage to single-axle (8 tons), tandem (10โ20), or tri-axle (20+) โ show hauling cost per trip and whether splitting makes sense.
๐ฒSide-by-side waste scenarioComing soon
Run 10%, 15%, and 20% waste simultaneously to see exactly how each tier changes tonnage, cost, and delivery trips.
๐๏ธSlope & drainage factorComing soon
Account for sloped driveways โ steeper grades need more base depth and specific gravel types to resist washout. Drainage swale integration.
Tool questions, answered
Why two layers instead of one?+
One thick layer of mixed stone does not compact well โ the pea gravel on top cannot compact with fines from the base because the two materials are mixed together. You end up with a weak center that shifts under traffic. Professional installers always lay and compact the base layer first, then the top layer separately.
Which waste factor should I use?+
10% minimum โ covers compaction settling, spillage during spread, and supplier rounding to full cubic yards. 15% for sloped driveways and curves. 20% if you want extra stone for touch-ups and occasional thin spots. Even experienced landscapers use 8โ10% as a floor.
Is pea gravel a good base layer?+
No. Pea gravel has no fines โ it cannot compact into a hard surface by itself. Use pea gravel only as a top decorative layer on top of a proper well-graded base (ABC/CA6). A pea gravel driveway over soil will wash out in the first heavy rain.
How much does geotextile fabric cost?+
$0.50โ$1.50 per square foot installed. Non-woven is cheaper ($0.50โ$0.80/sq ft), woven is stronger ($1.00โ$1.50/sq ft). Mandatory on clay soil โ it doubles practical lifespan by stopping fines from mixing up into the base.
Do I really need to calculate tonnage?+
Yes โ tonnage determines both how many delivery trucks you need and how much your aggregate yard charges per trip. A single-axle truck holds 8 tons max, a tandem holds 10โ20, a tri-axle holds 20+. Overbuy truck capacity and you pay a premium; underbuy and you split into two trips at double the hauling fee.
Can I use my own gravel density?+
Yes โ select 'Custom Density' from either layer's dropdown and enter any lbs/ftยณ value. This is useful if your local yard provides a specific density test result, or if you are using an unusual material not in the standard 11-type list.
Looking for the reading behind the numbers? The driveway & gravel guides cover density standards, two-layer system, and waste factors in depth โ or go straight to the calculator.
One shape is all it takes to start
Pick a shape, enter dimensions, two gravel layers, and watch the toolchain turn it into cubic yards, tons, and a five-material cost comparison.
๐ชจ Run the calculator