Engineering Tools
Free browser-based calculators and reference charts for sheet metal bending, power transmission, part weight, machining, and material planning. Built for engineers, makers, students, and FRC teams—with no software download.
3D Part Weight Calculator
Upload a STEP file and get its weight from the modeled solid volume and the material you pick, all in your browser.
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Material Weight Calculator
Calculate the weight of sheet, plate, discs, pipe, and tube from your dimensions, or from standard pipe, conduit, and copper tube sizes.
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Motor & Gear Ratio Calculator
Size a motor and gear train for a target speed and torque, or for a mass or inertia you need to accelerate. FRC mode adds motor presets and a gear catalog.
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Chain Sprocket Generator
Size an ANSI roller chain sprocket, check chain speed, and download a laser-cut plate version as STEP, DXF, or SVG or order it from Fabworks.
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Roller Chain Length Calculator
Find the roller chain length in links for a center distance, or the center distance for a link count, with wrap angle and ratio.
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Spur Gear Generator
Draw an involute spur gear and its mate from module or diametral pitch, tooth count, and pressure angle, then download STEP, DXF, or SVG or order them.
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Internal Ring Gear Generator
Draw an internal ring gear and its mating pinion from module or diametral pitch, tooth counts, and pressure angle, then download STEP, DXF, or SVG or order both.
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Gear Rack Generator
Size a gear rack and its pinion from module or diametral pitch: rack length, travel per turn, and linear force, then download STEP, DXF, or SVG.
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Cycloidal Drive Generator
Size a cycloidal reducer from ring pin count, pin circle, pin size, and eccentricity, then export the disc, pin ring plate, and output plate as STEP, DXF, or SVG.
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Pin Gear & Lantern Gear Generator
Generate a gear that meshes with round pins on a laser-cut pin wheel or pin rack, then export STEP, DXF, or SVG or order it.
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Bend Radius Calculator
Estimate finished inside and outside bend radius from Fabworks material, thickness, tooling, and bend angle.
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Minimum Flange Calculator
Find the minimum flange length and approximate distortion zone for Fabworks press-brake tooling.
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Minimum Joggle Calculator
Check the bend angle and spacing needed for a joggle made with Fabworks standard press-brake tooling.
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Reverse Bend Calculator
Check return-flange clearance for reverse bends.
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Box Depth Calculator
Check box depth and clearance for the final bends.
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Countersink Calculator
See the hole a countersink leaves on the back of thin sheet, and when you need an undercut screw.
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Tube Notch and Frame Calculator
Size the V-notch for any bend angle and lay out a square tube frame folded from one stick.
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Kerf Bend Calculator
Find the slot width, slot spacing, and slot count to kerf bend square tube into a curve.
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Calculator categories
Power Transmission Calculators
Plan gear reductions and chain drives, then generate laser-cut sprockets, spur gears, ring gears, racks, cycloidal drives, and pin gears as STEP, DXF, or SVG files.
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Weight and Materials Calculators
Find modeled STEP-part weight or estimate sheet, plate, panel, pipe, and tube weight across metals, plastics, wood, and composites.
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Sheet Metal Bending Calculators
Check bend radius, flange length, joggle spacing, reverse bends, and box depth.
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Square Tube Bending Calculators
Size relief notches and kerf slots to fold square tube into frames and curves.
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Calculation notes
Every tool states its equation, unit basis, and simplifying assumptions. Use the results for homework checks, design comparisons, and early manufacturing estimates.
Order Sheet Metal Parts
Upload a 2D DXF or 3D STEP file for an instant laser cutting quote. Quote in seconds, order in minutes, receive parts in days.
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STEP / DXF up to 24MB
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