How does a pea gravel calculator work?

It multiplies area × depth, converts to cubic yards (÷27), then optionally to tons using pea-gravel density (~1.4 US tons per cubic yard). Add ~10% waste for paths and beds.

How do I use a 57 gravel calculator?

#57 stone uses the same yardage math with ~1.35 tons per cubic yard. It is angular crushed stone for driveway bases, French drains, and paver bases — not rounded pea gravel.

How do I calculate gravel tonnage?

Cubic yards × density. Pea gravel ≈ 1.4; #57 ≈ 1.35; river rock ≈ 1.25 US tons per cubic yard. Always confirm with your supplier.

How much gravel for a French drain?

Trench volume minus pipe volume, then ÷27 for cubic yards. Use washed #57 (no fines). Example: 50 ft × 1 ft × 1.5 ft trench with a 4-inch pipe ≈ 2.6 cubic yards of stone.

How do I estimate gravel driveway cost?

Convert your yardage to tons, multiply by $/ton, then add delivery. Material often runs $1–$3 per sq ft for a basic gravel driveway before labor and fabric.

Pea Gravel Calculator Guide: Coverage, Tons, #57 & Driveways

Q: How much pea gravel do I need?

For 100 sq ft at 2 inches: 100 × 2 ÷ 324 = 0.62 cubic yards (~0.87 tons at 1.4 tons/cu yd). Paths and decorative beds usually use 2–3 inches of pea gravel.

Quick answer

A pea gravel calculator uses cubic yards = area × depth ÷ 27, then × ~1.4 for US tons. 100 sq ft at 2 inches ≈ 0.62 cu yd / 0.87 tons. Switch density for #57 or crushed stone. Use the free gravel calculator.

Pea gravel calculator basics

Searchers looking for a pea gravel calculator, calculating pea gravel, or how much pea gravel do I need want volume first, then weight. Pea gravel is rounded ¼–⅜ inch stone — great for paths and play areas, poor as a structural driveway base by itself.

Cubic yards = sq ft × depth (inches) ÷ 324 US tons ≈ cubic yards × 1.4

Pea gravel coverage calculator

Depth	Sq ft / cu yd	Sq ft / ton (~1.4 t/cu yd)
1 in	324	231
2 in	162	116
3 in	108	77
4 in	81	58

Decorative beds and walkways usually sit at 2–3 inches over landscape fabric. Deeper layers look fuller but cost more and still migrate underfoot because the stones are rounded.

57 gravel calculator (#57 crushed stone)

A #57 gravel calculator is the same volume tool with angular ¾–1 inch washed stone and ~1.35 tons per cubic yard. Use #57 for driveway bases, French drains, and paver bases where stones need to interlock.

Use case	Typical depth	Preferred stone
Pea gravel path	2–3 in	Pea gravel
Driveway base	4–6 in compacted	#57 / crush & run
French drain	8–12 in around pipe	Washed #57
Paver base	4–6 in + 1 in sand	#57 crushed

Gravel tonnage calculator

After yardage, convert with density. Example: 2.47 cu yd pea gravel × 1.4 = 3.46 US tons. Same volume of #57 × 1.35 ≈ 3.33 tons. Confirm the ticket density before you compare quotes.

Convert with cubic yards to tons, or run both units in the gravel calculator.

French drain gravel calculator

French drain gravel = trench volume − pipe volume. Washed #57 (no fines) keeps water moving. Example: 50 ft long × 12 in wide × 18 in deep with a 4-inch pipe ≈ 2.57 cubic yards of stone. Add fabric and cleanout planning before you dig.

Gravel driveway cost calculator tips

Cost ≈ tons × $/ton + delivery (+ labor if hired). A 500 sq ft driveway needing ~12–15 cu yd / ~18–22 tons often lands around $400–$1,500 in material alone. Layering and compaction details: gravel driveway guide. Yardage walkthrough: how to calculate yards of gravel. Quantity overview: how much gravel do I need.

Crushed gravel, pavers & landscape beds

Crushed gravel / crusher run packs tighter than pea gravel — better for structural base. Paver bases need compacted crushed stone plus bedding sand. Landscape beds can stay decorative with pea gravel or river rock at shallow depth. Match the stone to the job before you trust any online estimate.