Limestone Calculator
Find out exactly how much crushed limestone you need — tons, cubic yards, weight and cost, with a bagged-vs-bulk comparison and a coverage planner.
Your area
2–3 in for a walkway, 4–6 in for a driveway base.
Everything is calculated in your browser. Nothing you type is sent anywhere or stored.
Material breakdown
3.7 tons needed
Bagged vs bulk delivery
—
Coverage by depth
The short answer
Multiply your area in square feet by the depth in feet to get cubic feet, add 5–10% waste, divide by 27 for cubic yards, then multiply by your limestone’s density — typically 1.2 to 1.5 tons per cubic yard — to get tons. A 20 ft × 10 ft area at 4 inches deep needs roughly 3.7 tons of 3/4 in crushed limestone.
Tons per cubic yard, by limestone type
| Type | Density | Typical use |
|---|---|---|
| 3/4 in crushed limestone | 1.35 tons/cu yd | General base, driveways |
| Number 57 crushed limestone | 1.2 tons/cu yd | Drainage, structural base |
| Limestone screenings / dust | 1.5 tons/cu yd | Paver base, top layer |
| Pea-size limestone gravel | 1.3 tons/cu yd | Walkways, decorative fill |
Exact density varies by quarry and moisture content, so treat these as planning figures rather than a guaranteed weight.
How deep should the limestone layer be?
| Project | Typical depth |
|---|---|
| Walkway or garden path | 2–3 in |
| Paver or patio base | 4 in |
| Shed or small structure pad | 4 in |
| Driveway base | 4–6 in |
| Heavy-traffic driveway or parking area | 6–8 in, compacted in layers |
Anything deeper than about 4 inches is usually placed and compacted in layers rather than all at once, so each layer bonds and settles properly.
How to calculate limestone needed
Limestone is priced and delivered by weight, so the goal is converting a volume into tons.
- Find the area. Length × width for a rectangle, or π × (diameter ÷ 2)² for a circle, in square feet.
- Multiply by depth. Convert depth to feet and multiply by area to get cubic feet.
- Add waste. 5–10% covers compaction and uneven ground.
- Convert to cubic yards. Divide cubic feet by 27.
- Multiply by density. Use your limestone type’s tons-per-cubic-yard figure to get the final tonnage.
Worked example
A 20 ft × 10 ft area at 4 inches deep, using 3/4 in crushed limestone:
- Area20 × 10 = 200 sq ft
- Volume200 × 0.333 = 66.7 cu ft
- Plus 10% waste73.3 cu ft
- Convert to cubic yards73.3 ÷ 27 = 2.72
- Multiply by density2.72 × 1.35 = 3.7 tons
That’s about 3.7 tons — worth pricing against a bulk delivery quote, since bagged limestone gets expensive well before you reach that quantity.
Bagged limestone vs bulk delivery
| Bagged (40–50 lb) | Bulk delivery | |
|---|---|---|
| Best for | Small jobs, under about 1 ton | Larger jobs, 1 ton and up |
| Handling | Carry and pour bag by bag | Delivered in one drop, dumped or spread |
| Minimum order | None — buy what you need | Often 1–3 tons, short-load fees below that |
| Typical cost per ton | Usually higher per ton | Usually lower per ton at volume |
For a small planter border or a short garden path, bags are simple and there’s no minimum order. For anything approaching or exceeding about a ton, get a bulk delivery quote from a local quarry or landscape supplier.
Laying a limestone base: a quick checklist
- Clear and grade the areaRemove sod and debris, and grade for drainage away from structures.
- Add landscape fabricA fabric barrier under the limestone reduces weed growth and keeps it from mixing into the soil below.
- Spread in layersFor depths over about 4 inches, place and compact in layers rather than all at once.
- Compact each layerA plate compactor gives a firmer, longer-lasting base than raking and walking it down.
- Crown or slope the surfaceA slight slope sheds water instead of letting it pool on the base.
- Top-dress if neededA thin layer of screenings over a coarser base gives a smoother finished surface.
Common mistakes
- Confusing volume with weightLimestone is sold by the ton, not the cubic yard — always convert using the type’s density before ordering.
- Using one density for every typeScreenings, crushed stone and pea gravel don’t weigh the same per cubic yard — check the type before converting.
- Skipping compactionUncompacted limestone settles unevenly over time, especially under driveways or paver bases.
- Ordering bagged for a large jobBagged limestone is convenient for small areas but gets expensive fast — price a bulk delivery once you’re near a ton.
- Forgetting landscape fabricWithout a barrier, limestone gradually works into the soil below and needs topping up sooner.
- Not accounting for delivery minimumsSome suppliers charge a short-load fee below their minimum order — check before finalizing your order.
What this calculator assumes
Adjust your result if your project differs from these.
- Densities of 1.35, 1.2, 1.5 and 1.3 tons per cubic yard for crushed, number 57, screenings and pea gravel
- Rectangular area treated as length × width; circular area treated as a true circle
- Bagged equivalent assumes 50 lb bags
- Bagged vs bulk guidance uses a roughly 1 ton rule of thumb, not a supplier quote
- Prices are whatever you enter; they are not live market rates
Common questions
How much limestone do I need?
Multiply your area in square feet by the depth in feet to get cubic feet, add 5 to 10 percent waste, divide by 27 for cubic yards, then multiply by the density of your limestone type, typically 1.2 to 1.5 tons per cubic yard.
How many tons of limestone are in a cubic yard?
It depends on the type. Crushed 3/4 in limestone runs about 1.35 tons per cubic yard, number 57 crushed limestone about 1.2, limestone screenings about 1.5, and pea-size limestone gravel about 1.3.
How deep should a limestone base be?
A walkway base is often 2 to 3 inches deep, a driveway base 4 to 6 inches, and a base under pavers or a shed pad around 4 inches, compacted in layers for anything deeper than about 4 inches.
What is the difference between crushed limestone and limestone screenings?
Crushed limestone is larger, angular fragments used as a structural base, while screenings are fine, dust-like limestone particles used as a top layer or paver base for a smooth, compactable finish.
Can I buy limestone in bags instead of bulk?
Yes, most home and garden stores sell limestone in roughly 40 to 50 lb bags for small jobs. For anything beyond a ton or so, bulk delivery is usually far more cost effective.
How much does a ton of limestone cost?
Pricing varies by region, type and delivery distance, but crushed limestone commonly runs in the range of 25 to 60 dollars per ton for bulk delivery, before any delivery or minimum-load fees.
Do I need to compact limestone base?
Yes. Compacting in layers, especially for anything over 4 inches deep, reduces future settling and gives a firmer, more stable base.
Is limestone good for a driveway base?
Crushed limestone is a common and effective driveway base material thanks to its angular shape, which locks together and compacts well under vehicle loads.
What size limestone is best for a walkway?
A compactable base like number 57 crushed limestone topped with limestone screenings for a smooth finish is a common combination for walkways and paver bases.
Is there a minimum order for bulk limestone delivery?
Many suppliers set a minimum delivery load, often around 1 to 3 tons, and may charge a short-load fee below that. Check with your local supplier.
Embed this calculator
Related calculators
Limestone Estimate
—
materialcalculate.com/tools/limestone-calculator/
Project
| Area | — |
| Depth | — |
| Limestone type | — |
| Waste allowance | — |
Total shopping list
| Cubic feet | — |
| Cubic yards | — |
| Tons needed | — |
| Bagged equivalent (50 lb bags) | — |
| Estimated cost | — |
Notes
Estimate generated by materialcalculate.com. Assumes standard densities for common limestone products. Confirm quantities and pricing with your local supplier before buying.