The Tools · 27 tools

Calculators that do the math, not the marketing.

Free, no sign-up, and built for people who make real parts — across tube bending, fabrication, machining, mechanical design, quality, electrical, civil and thermal. Each one runs entirely in your browser.

Tube bending

LiveTube & Pipe Bend ↗Cut length, every bend angle, arc, rotation and the straight (STR REF) between bends from X-Y-Z points, with a 3D view.XYZ · STR REF · 3D LiveXYZ → YBC Converter ↗Turn drawing X-Y-Z bend points into the bender setup — feed (Y), rotation (B) and bend angle (C / DOB) per bend.feed · rotate · DOB LiveBend Sequence 3D ↗Step through a tube bend by bend in 3D to see how the plane-of-bend rotates at each stage — YBC input.YBC · 3D · stepper

Manufacturing & fabrication

LiveSheet Metal Bend ↗Bend allowance, deduction, setback and flat-pattern length, with a live diagram.K-factor presets · metric / imperial LivePress Brake Tonnage ↗Air-bend force from thickness, length, tensile and V-die, plus recommended die and radius.force · V-die · min flange LiveFillet Weld Size ↗Throat thickness and shear capacity of a fillet weld from leg, length and allowable stress.throat · capacity

Machining & holes

LiveSpeeds & Feeds ↗Spindle RPM from cutting speed and diameter, feed rate from chip load and flute count.milling · drilling · turning LiveTap Drill & Thread ↗Tap drill for a target % thread, clearance holes, pitch and TPI — metric and UNC/UNF.% thread · clearance LiveDrill Point & Countersink ↗Drill-tip cone length past full diameter, and countersink plunge depth from diameter and angle.tip length · countersink LiveBolt Circle ↗X-Y and polar coordinates of every hole on a bolt circle, with a live plot.CNC · layout · inspection

Mechanical design

LiveBolt Torque ↗Tightening torque from target preload (T = K·d·F), with proof-load clamp force.metric · class · K factor LiveSpur Gear ↗Pitch, outside and root diameter from module and teeth, plus pair centre distance and ratio.module / DP · centre distance LiveBelt & Pulley ↗Driven RPM, speed ratio, open-belt length and belt speed from pulley sizes and centres.ratio · belt length · speed LiveBeam Deflection ↗Max deflection, bending moment and stress for simply-supported and cantilever beams.point / UDL · stress LiveSine Bar ↗Gauge-block stack height to set a precise angle, and the angle from a known stack.stack ↔ angle

Quality & inspection

LiveGD&T True-Position ↗Position, MMC/LMC bonus tolerance, total allowable and pass/fail, with a target plot.MMC / LMC / RFS LiveTolerance Stack-up ↗1-D dimension chain with worst-case and statistical (RSS) limits for gaps and fits.worst-case · RSS LiveMaterial Weight ↗Weight of bar, tube, plate, square and hex stock by alloy — per piece, qty and length.14 materials + custom

Electrical

LiveOhm's Law ↗Enter any two of voltage, current, resistance or power and get the other two.V=IR · P=VI LiveVoltage Drop ↗Cable voltage drop and % from current, run length, conductor size and material.copper / aluminium · 1ph / 3ph LiveLED Series Resistor ↗Series resistor value, nearest standard size and power from supply, Vf and current.E12 · power rating

Civil

LiveConcrete Volume ↗Volume for a slab, footing or column, plus cement bags, sand and aggregate for a mix.slab / column · mix ratio LiveStair ↗Risers, exact riser height, treads and total run from the total rise, with a comfort check.risers · going · 2R+G LiveSlope & Grade ↗Convert a slope between percent grade, angle in degrees and ratio (1:n).grade · angle · ratio

Thermal

LiveThermal Expansion ↗Length change with temperature (ΔL=αLΔT), plus constrained stress, with material presets.ΔL · constrained stress LiveHeat Conduction ↗Steady-state heat flow through a wall (Q=kAΔT/L), with R-value and U-value.Fourier · R / U-value LiveSensible Heat ↗Energy to heat a mass (Q=mcΔT) in J, kJ and kWh, plus power for a heat-up time.Q=mcΔT · power

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