The free body diagram creator is a 2D sketch tool for engineering statics. Available elements include force arrows, straight lines, moment arcs, rectangles, ellipses, and cylinders. Double-click any shape to add a label. Everything is draggable and snaps to a grid.
Export as PNG and paste directly into Word or Google Docs. SVG export works for Illustrator or LaTeX. Diagrams save to a .fbd file and reload from the same.
Add any number of 2D force vectors by specifying magnitude and angle. The tool draws each vector on a canvas and computes the resultant force, its x and y components, and its direction angle. Useful for statics problems involving concurrent force systems.
Results update live as you adjust inputs. Export the diagram as PNG or PDF for inclusion in a lab report or homework submission.
Specify beam length, support conditions, and loading. The tool solves reactions analytically and plots the shear force diagram and bending moment diagram with zero crossings and critical values labeled. A tabbed view shows the FBD, V diagram, M diagram, or all three together.
The results panel outputs piecewise V(x) and M(x) in terms of your load variable names, which makes it easy to check hand calculations. Supported conditions include simply supported, pin-roller, and cantilever beams under point loads, partial or full-span UDLs, and applied moments.
Enter a plane stress or plane strain state and the tool draws the Mohr's circle, then reports the principal stresses, the maximum in-plane shear stress, and the orientation angles of each. The stress element is drawn alongside the circle and rotates as you change the angle, so you can see how the normal and shear components transform together.
Drag the point on the circle to rotate the element to any angle and read the transformed components directly. Export the circle and element diagram as PNG or SVG for a report. Useful for stress transformation problems and for checking failure-criterion calculations by hand.
Standard load cases from Roark's Formulas for Stress and Strain. Select a case, enter geometry and load values, and get maximum deflection, slope, and support reactions. The solve-for-any-variable feature means you can work backwards from a deflection limit to find the required load or span.
Build a composite cross-section by adding rectangles, circles, hollow tubes, and standard I-sections. The tool computes the centroid location, Ix, Iy, and the parallel-axis theorem contribution of each part relative to the composite neutral axis. Useful for bending stress and deflection problems where you need the exact second moment of area for a non-standard section.
The cross-section diagram updates live as you add or reposition shapes. Export as PNG for your report or copy directly to the clipboard.
A state solver for Rankine steam cycles. Enter any properties you know at each state point, pressure, temperature, quality, enthalpy, entropy, and the tool propagates the rest using IAPWS-IF97 water and steam data. It then computes turbine and pump work, boiler and condenser heat, thermal efficiency, and back work ratio for the cycle.
Because the property data is implemented client-side, results update as you edit inputs with nothing sent to a server. Useful for thermodynamics coursework where you would otherwise be interpolating steam tables by hand.
Annotate a PDF with freehand markup and text notes, then export the result. Combine multiple PDFs into a single file. Everything runs client-side using pdf-lib and PDF.js, so no files are uploaded to any server.
140 questions aligned to Hibbeler's Mechanics of Materials, Chapters 1 through 14. Topics include stress, strain, axial load, torsion, bending, transverse shear, combined loading, stress transformation, deflection, and statically indeterminate structures. Each question has a retry variant for a second pass.
These tools were built to fill a gap where most online statics and mechanics calculators either require an account, restrict export behind a paywall, or produce diagrams too small to use in a report. All computation runs client-side. No data is sent to a server.
Resultant provides free browser-based engineering tools for undergraduate students, including a free body diagram creator, vector resultant calculator, shear and moment diagram calculator, Mohr's circle calculator, beam formula reference, area moment of inertia and centroid calculator, a Rankine cycle thermodynamics solver, and PDF document utilities. No account or installation required.
