Pea Gravel Calculator

Calculate gravel and costs for fuel tank installations instantly. Perfect for contractors and site managers. No ads, no subscriptions, privacy-first design.

Order the right amount of gravel the first time.

Tank Install Calculator is a field-ready estimating tool for underground fuel tank installations. Built for contractors, excavation crews, and site managers, it turns tank specs and hole dimensions into the numbers you actually need on the job: how big to dig, and how many tons of backfill to order.

SIZE THE HOLE FROM THE TANKS Pick tank models from a built-in catalog of standard fiberglass and steel sizes — single- and double-wall — or enter your own diameter and length. Set your clearances (spacing between tanks, tank to wall, bedding below, cover above) and get the required excavation floor and depth instantly, drawn as a to-scale cross-section with every dimension labeled: tank sizes, spacing between tanks, clearance to the walls, and cover to grade.

ACCOUNT FOR THE WALLS Vertical/shored, sloped, or benched — the calculator follows OSHA Subpart P soil classifications (Type A, B, and C) and automatically widens the excavation volume when the walls are cut back, so a sloped hole never leaves you short on material.

TONNAGE, NOT GUESSWORK The app subtracts tank displacement, applies your material density (with a built-in reference guide for pea gravel, sand, and crushed stone), and adds an adjustable waste & compaction factor. You get the calculated fill, a recommended order quantity, and roughly how many truckloads that is. Add a price per ton for an instant cost estimate. Results update live as you move the sliders.

COMPARE OPTIONS, KEEP RECORDS Save calculations as named jobs — and save different tank sizes or shoring options to the same job to compare them side by side. Share a clean text report by message or email straight from the site.

WORKS THE WAY YOU DO • US units (feet & tons) or metric (meters & tonnes) • No account, no ads, no subscription • Works completely offline — nothing ever leaves your phone • To-scale diagrams on every result

Estimates are for planning. Always verify quantities, soil classification, and excavation safety requirements with a qualified engineer and local regulations before ordering material or digging.