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Length Converter
Convert lengths ( mm, cm, m, km, in, ft, yd, mi, ...) between metric and U.S. units, including feet and inches, with exact factors and the conversion steps shown.
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Apps by H4M Team
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Force Converter
Convert forces between newtons, kilonewtons, pound-force, kips, kilogram-force and more, with exact factors and the conversion steps shown.
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Area Converter
Convert areas between mm², cm², m², in², ft², acres, hectares and more, with exact factors and the conversion steps shown.
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Volume Converter
Convert volumes between mL, liters, m³, in³, ft³, U.S. and imperial gallons and more, with exact factors and the conversion steps shown.
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Stress and Pressure Converter
Convert stress and pressure between Pa, kPa, MPa, GPa, psi, ksi, bar, atm, mmHg and more, with exact factors and the conversion steps shown.
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Velocity Converter
Convert speeds between m/s, km/h, ft/s, mph and knots, and rotational speeds between rpm and rad/s, with the conversion steps shown.
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Temperature Converter
Convert temperatures between °C, °F, K and °R, and temperature differences without the offset, with the formulas shown step by step.
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Time Converter
Convert time between nanoseconds, seconds, minutes, hours, days, weeks and years, or split a duration into hours, minutes and seconds.
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Angle Converter
Convert angles between degrees, radians, degrees-minutes-seconds, gradians and turns, with exact π-based factors and the steps shown.
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Moment and Torque Converter
Convert moments and torques between N·m, N·mm, kN·m, lbf·in, lbf·ft, kip·ft, kgf·m and more, with exact factors and the steps shown.
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Moment of Inertia Converter
Convert the second moment of area (mm⁴, cm⁴, in⁴, ft⁴) and the mass moment of inertia (kg·m², lb·ft², slug·ft²) with exact factors and steps.
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12
Dot Product Visualizer: Angles and Projections in 3D
See what the dot product means: the angle between two directions and the part of a force along a line, drawn in 3D with its perpendicular part and a right-angle mark.
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3D Force Vector Builder: Angles, Two Points and Sums
Build a force in space from its components, its three direction angles, two angles or two points, turn the 3D view with the mouse, and add several forces into one.
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Coplanar Force Resultant: Table, Polygon and Missing Force
Add any number of forces in a plane with a clear component table and a force polygon, or find the force that is missing, that balances the others or that turns the resultant to a wanted direction.
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15
Force Resolver: Split a Force Along Any Two Directions
Split a force into two parts along any two directions, perpendicular or not, or into x and y parts from an angle or a slope, with every step shown on the drawing.
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Force Addition Lab: Parallelogram, Triangle and Polygon Rules
Drag two or more forces and watch their resultant appear by the parallelogram, triangle or polygon rule, with the magnitude and direction worked out live.
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