Engineering (65 tools)
Concrete, paint, wire sizing, voltage drop, beam loads and pipe flow
🧱Concrete CalculatorConcrete volume and materials.🎨Paint Coverage CalculatorPaint needed for your walls.🔌Wire Size CalculatorWire gauge, ampacity and voltage drop.⚡Voltage Drop CalculatorVoltage drop and line loss.📏Beam Load CalculatorBeam moment, shear and deflection.🌊Pipe Flow CalculatorPipe flow, velocity and regime.⚙Torque CalculatorTorque, power and speed.🎨Paint QuantityPaint volume and can count from room perimeter, ceiling height, openings and coats.▦Tile QuantityTiles and boxes needed from area, tile size, waste factor and pack quantity.🪵Flooring QuantityBoxes and planks needed from room size, plank spec and waste factor.🧻Wallpaper RollsRolls needed from wall area, roll spec and pattern-repeat waste.🧱Concrete Mix MaterialsCement, sand, gravel and water from pour volume and volumetric mix, converted to bags.🏠Roof Area CalculatorActual roof area and material quantity from the plan area and roof pitch.@/VVoltage Drop CalculatorVoltage drop and end voltage from current, run length, resistivity and conductor area.🧱Slab Concrete and RebarConcrete volume and rebar weight from slab area, thickness and reinforcement ratio.🚿Pipe Flow CalculatorFlow from diameter and velocity, or the diameter needed for a target flow.⚙Pump PowerShaft and motor power from flow, head and efficiency.🏗Simply Supported BeamMaximum moment, shear and deflection for a uniformly loaded simply supported beam.🔌Wire Size SelectionRequired copper cross-section and breaker rating from load current and installation conditions.⚙️machining time CalculatorMachining time from cutting length, feed rate and passes, with hourly output and batch hours.🔩steel plate weight CalculatorTheoretical weight from length, width, thickness and density, with the weight per square metre.🔩stainless steel plate weight CalculatorTheoretical weight from length, width, thickness and density, with the weight per square metre.🔩round bar weight CalculatorTheoretical weight and weight per metre from the section size and length.🔩square bar weight CalculatorTheoretical weight and weight per metre from the section size and length.🔧steel pipe weight CalculatorTheoretical weight and weight per metre of a steel pipe from outside diameter, wall thickness and length.🔧square tube weight CalculatorTheoretical weight and weight per metre of a square tube from side, wall thickness and length.🔗rebar weight per metre CalculatorTheoretical rebar weight per metre and per bar from nominal diameter, with a common-size table.🪨hardness conversion Reference TableConvert Rockwell HRC to Brinell HB, Vickers HV and approximate tensile strength using standard empirical relations.📏IT tolerance grade Reference TableLook up the standard tolerance value for a nominal size and IT grade, then split it into upper and lower deviations.🔩bolt tightening torque CalculatorRecommended tightening torque and preload from thread size, property class and friction coefficient.🪛tap drill size Reference TableTap drill diameter from thread size and pitch, with a table of common sizes.⚙️cutting speed CalculatorSpindle speed from tool diameter and cutting speed, with the reverse calculation.🔘bearing life CalculatorL10 basic rating life in million revolutions and hours from dynamic load rating and equivalent load.🛠️hydraulic cylinder force CalculatorPush and pull force of a hydraulic cylinder from bore, rod diameter and system pressure.🌀spring rate CalculatorStiffness and deflection of a helical compression spring from wire diameter, mean diameter and active coils.🔁belt length CalculatorOpen-belt length and wrap angle from both pulley diameters and the centre distance.🏭conveyor capacity CalculatorVolumetric and mass throughput of a belt conveyor from belt width, speed and material surcharge angle.🔌AWG wire gauge Reference TableConvert an AWG number into diameter, cross-section and a typical ampacity reference.🔌cable ampacity CalculatorLong-term current capacity and suggested breaker size from conductor area, material and installation method.⚡three-phase power CalculatorApparent, active and reactive three-phase power from line voltage, line current and power factor.⚡power factor correction CalculatorCapacitor bank size needed to raise the power factor, plus the line-loss saving.⚙️motor rated current CalculatorRated and starting current from motor power, voltage, power factor and efficiency.🔋transformer capacity CalculatorRequired transformer capacity from load, power factor and demand factor, with standard size suggestions.🧵conduit fill CalculatorRequired conduit size and fill ratio from the number and size of conductors.🔲breaker sizing CalculatorPick a breaker rating from the load current and the conductor ampacity.⏚earth conductor size CalculatorMinimum protective earth conductor size for a given phase conductor.💡LED series resistor CalculatorSeries resistor value and power from supply voltage, LED forward voltage and target current.🔆lumen to lux ConverterConvert lumens into lux by area or distance, and back.🏠room lighting requirement CalculatorTotal lumens and fitting count from room area and the illuminance target for its use.🔌LED driver power CalculatorDriver voltage, current and power from the LED series/parallel layout, plus a margin suggestion.💡LED strip power CalculatorTotal power, current and supply rating from strip length and power per metre.💰lighting energy cost CalculatorCompare power, life and total cost of two lamp types and get the payback of an LED retrofit.📶dBm to milliwatt ConverterConvert between dBm, milliwatts and watts, with the equivalent voltage across 50 Ω.📡free space path loss CalculatorFree-space path loss from frequency and distance, with the maximum range from a link budget.📻antenna length CalculatorQuarter-wave, half-wave dipole and velocity-factor-corrected lengths from the frequency.📊VSWR and return loss CalculatorConvert between VSWR, reflection coefficient, return loss and mismatch loss.🏗️concrete volume CalculatorConcrete volume, weight and a cement/sand/aggregate reference from member dimensions.🧱brick quantity CalculatorBricks, mortar and weight from wall area and brick format.🔥combustion air CalculatorTheoretical and actual air demand plus flue gas volume from fuel composition.🧴plastic shrinkage CalculatorConvert a finished part dimension into the mould cavity size using the material shrinkage.📶wavelength CalculatorConvert between frequency and wavelength, with half-wave, quarter-wave and guided lengths.📡link budget CalculatorReceived level and link margin from transmit power, antenna gains, path loss and margins.📡antenna gain CalculatorTheoretical gain, beamwidth and half-power angle from parabolic aperture and frequency.🔦fibre loss CalculatorOptical power budget and maximum reach from fibre attenuation, connectors and splices.🏗️beam deflection CalculatorMaximum deflection, moment and required moment of inertia for a simply supported beam under UDL.