Limestone Calculator - Free Calculator 2026

A cubic yard of crushed limestone weighs approximately 1.3 to 1.9 tons (2,600-3,800 lbs) depending on the grade and size. Limestone screenings weigh 1.6-1.75 tons per cubic yard due to fine particles packing tightly. #57 limestone (¾ inch stones) weighs 1.4-1.5 tons per cubic yard. Solid limestone blocks weigh approximately 2.0 tons per cubic yard.

Weight varies based on several factors: compaction level (compacted limestone weighs 15-25% more), moisture content (wet limestone is 5-10% heavier), stone size (smaller stones pack tighter), and limestone purity (higher calcium content increases density).

To calculate limestone needed: (1) Measure length and width of area in feet, (2) Determine depth in inches, (3) Calculate volume: length × width × (depth ÷ 12) = cubic feet, (4) Convert to cubic yards: cubic feet ÷ 27 = cubic yards, (5) Calculate tons: cubic yards × limestone density (1.5 tons/yd³ average) = tons needed.

Add 10-15% waste factor for irregular areas, compaction losses, and future maintenance. For compacted applications (driveways, parking areas), add an additional 15-25% to account for settling during compaction. Use our limestone calculator above for instant accurate results with all factors included.

The best limestone for driveways is #57 limestone (¾ inch angular stones) or crushed limestone base (#411 or #304 mix). Use 4-6 inches compacted depth for residential driveways. For optimal results, install a two-layer system: 3-4 inches of #411 limestone base layer (excellent compaction and stability), topped with 2-3 inches of #57 stone or limestone screenings (smooth durable surface).

Limestone screenings create the hardest, smoothest surface but may wash out in heavy rain without proper drainage. #57 limestone provides better drainage while maintaining good compaction. Avoid #2 or #3 large stones for driveways as they don't compact well and create a rough, unstable surface.

In 2026, crushed limestone costs $30-$75 per ton in the USA, averaging $45 per ton. Limestone screenings cost $35-$60 per ton. #57 limestone costs $40-$70 per ton. Clean deep-mined limestone costs $50-$80 per ton. #411 or #304 base mix costs $45-$75 per ton due to additional processing.

Delivery adds $50-$200 depending on distance and load size. Bulk orders (10+ tons) typically receive 10-20% discounts. Prices vary by region: Midwest ($30-$50/ton), Northeast ($40-$60/ton), Southeast ($35-$55/ton), West Coast ($50-$75/ton). Agricultural lime costs $40-$65 per ton.

One ton of crushed limestone covers approximately 80-100 square feet at 3-inch depth (compacted), or 60-80 square feet at 4-inch depth. Coverage depends on limestone type, depth, and compaction. At 2 inches depth, 1 ton covers 120-140 sq ft. At 3 inches depth, 1 ton covers 80-100 sq ft. At 4 inches depth, 1 ton covers 60-80 sq ft. At 6 inches depth, 1 ton covers 40-50 sq ft.

Compacted limestone covers 15-25% less area than loose limestone due to settling and increased density. Limestone screenings cover slightly less area (higher density) while large stones (#2, #3) cover slightly more area (lower density) at the same weight.

Limestone base layer depth varies by application: Residential driveways require 4-6 inches compacted. Patios and walkways need 3-4 inches. Commercial parking areas need 6-8 inches. Foundation bases require 4-6 inches. Road bases need 8-12 inches. Heavy equipment areas need 10-15 inches.

Always compact limestone in 2-3 inch lifts for maximum stability. Installing full depth without intermediate compaction results in poor density and premature failure. Add landscape fabric underneath to prevent mixing with subgrade soil and maintain structural integrity. Proper depth and compaction ensure 15-20 year lifespan for driveways.

Limestone is better than gravel for driveways because: (1) It compacts tighter creating a harder surface, (2) Costs 10-20% less ($30-$50 vs $40-$60 per ton), (3) Drains well but holds shape better, (4) Angular limestone edges interlock better than rounded gravel, (5) Less prone to scattering and displacement, (6) Easier to grade and maintain.

However, decorative gravel looks more attractive and washes less in heavy rain. For best results, use limestone base (3-4 inches #411 mix) with decorative gravel top layer (2 inches). This provides limestone's structural strength with gravel's aesthetic appeal.

Yes, always compact limestone after spreading for maximum stability and durability. Compact in 2-3 inch lifts using a plate compactor (small areas) or vibratory roller (large areas). Proper compaction increases density 25-35%, prevents settling and rutting, creates a hard durable surface, improves drainage, and extends project lifespan from 3-5 years to 15-20 years.

Water lightly before compacting for best results (but not saturated). Make 4-6 passes with compactor for each lift. Limestone screenings compact tighter than larger stones. Uncompacted limestone will settle 15-25% over the first year, creating low spots, ruts, and drainage problems. Professional compaction equipment rental costs $75-$150 per day.