# Free tools for bulk materials and rail

> Free calculators and tools from Rebulk: stockpile volume calculator, cubic yards to tons converter, gravel calculator, bill of lading generator, and rail demurrage calculator. No signup.

Calculators and generators we built for the people who measure piles and move railcars. Free, no signup, and everything runs in your browser.

![An amber caliper measuring a conical stockpile overlaid with a glowing measurement mesh, beside a stack of shipping documents and a rail hopper car. Free measurement tools for bulk materials](https://rebulk.com/tools-hub-hero.webp)

## [Rail Transload Planner](https://rebulk.com/tools/rail-transload-planner)

Find open-access transloaders near your customer and estimate the savings of railing the long haul vs. shipping all-truck.

Open tool

## [Rail vs. Truck Cost Calculator](https://rebulk.com/tools/rail-vs-truck-calculator)

Compare all-truck against rail-plus-transload for your lane: savings, breakeven distance, and CO₂ — with editable benchmark rates.

Open tool

## [Transload Siting Gaps](https://rebulk.com/tools/transload-siting-opportunities)

Where a rail-served, open-access transloader belongs but doesn't exist: rail-served counties with bulk demand and no terminal in dray range, ranked.

Open tool

## [Stockpile Volume Calculator](https://rebulk.com/tools/stockpile-calculator)

Volume, tonnage, and truckloads for conical piles, windrows, and bunkers, with material density built in.

Open tool

## [Grain Bin Volume Calculator](https://rebulk.com/tools/grain-bin-volume-calculator)

Capacity of a round grain bin or silo in bushels, tons, and cubic feet, for level, peaked, and hopper-bottom fills.

Open tool

## [Cubic Yards ↔ Tons Converter](https://rebulk.com/tools/cubic-yards-to-tons)

Convert volume to weight (and back) for 18 bulk materials, plus a full density and angle-of-repose chart.

Open tool

## [Gravel & Material Calculator](https://rebulk.com/tools/gravel-calculator)

How much gravel, stone, sand, or soil an area needs, in cubic yards, tons, and dollars.

Open tool

## [Railcar Capacity Calculator](https://rebulk.com/tools/railcar-capacity-calculator)

Tons per car by commodity and car type — weight- vs volume-limited, overweight warnings, and the truckload equivalent.

Open tool

## [STCC Code Lookup](https://rebulk.com/tools/stcc-code-lookup)

Search 2,000+ rail commodity codes by name or prefix — the code railroads ask for on every rate request and waybill.

Open tool

## [Bill of Lading Generator](https://rebulk.com/tools/bill-of-lading-generator)

Create and print a clean straight BOL in your browser. Nothing uploaded, nothing stored.

Open tool

## [Rail Demurrage Calculator](https://rebulk.com/tools/demurrage-calculator)

Estimate demurrage exposure per car, per event, and per year from days held, free time, and tariff rate.

Open tool

## [Demurrage Rates by Railroad](https://rebulk.com/tools/railroad-demurrage-rates)

What UP, BNSF, CSX, NS, CN, and CPKC currently charge when cars sit — rates, free time, and links to the governing tariffs.

Open tool

## [GSD Calculator](https://rebulk.com/tools/gsd-calculator)

Ground sample distance for drone mapping flights: camera, altitude, cm/px, and image footprint.

Open tool

## [Bulk Density Chart](https://rebulk.com/tools/bulk-density-chart)

Loose densities and angles of repose for 18 materials, in lb/yd³, tons/yd³, and kg/m³.

Open tool

## [Rebulk Blueprint](https://blueprint.rebulk.com/)

Model your shed or yard in 3D and see how many sensors full coverage takes: placements, coverage percentage, and a printable plan.

Open Blueprint

These tools estimate. Rebulk measures.

When the numbers feed a balance sheet, estimates stop being enough. Rebulk measures actual inventory with phone scans, drone capture, and fixed sensors, all in one system.

[Book a Demo](https://rebulk.com/contact)

---

Source: https://rebulk.com/tools