Machining & drilling
Drill speed and feed calculator
Choose a practical starting point by drill diameter and cutting speed.
Open drill speed and feed calculatorMETALCALZ INDUSTRIAL TOOL LIBRARY
Online industrial calculators for real workshop decisions.
Use free online metal fabrication calculators, machining calculators, welding calculators, piping tools and construction estimators. No signup required. Every result explains its assumptions.
Machining & drilling
8 toolsMachining & drilling
Drilling power calculator
Estimate drilling feed, material removal rate and cutting power.
Open drilling power calculatorMachining & drilling
Milling speed and feed
Calculate starting spindle speed and cutter feed rate.
Open milling speed and feedMachining & drilling
Turning speed and feed
Calculate lathe spindle speed and feed rate.
Open turning speed and feedMachining & drilling
Countersink depth & diameter
Depth and point depth for a countersunk hole from top and pilot diameters.
Open countersink depth & diameterMachining & drilling
Drill tip / blind-hole depth
Tip depth and total travel for a pointed drill at a target full depth.
Open drill tip / blind-hole depthMachining & drilling
Reaming allowance & pre-hole
Pre-hole size from finished diameter and reaming allowance.
Open reaming allowance & pre-holeMachining & drilling
Cutting time and production rate
Estimate cycle time, batch time and parts per hour.
Open cutting time and production rateThreads & fasteners
4 tools
Threads & fasteners
Metric tapping drill size
Find the correct starting hole for a metric internal thread.
Open metric tapping drill sizeThreads & fasteners
Thread size and clearance hole calculator
Reference thread pitch, clearance and practical hole sizes.
Open thread size and clearance hole calculatorThreads & fasteners
Bolt circle / PCD calculator
Lay out equally spaced holes around a pitch circle.
Open bolt circle / pcd calculatorThreads & fasteners
Bolt torque & preload
Starting torque from bolt size, grade, K factor and target preload.
Open bolt torque & preloadSheet metal
5 toolsSheet metal
Sheet-metal bend allowance
Estimate bend allowance, deduction and flat blank length.
Open sheet-metal bend allowanceSheet metal
Press brake tonnage
Air-bend force per metre and total force against machine capacity.
Open press brake tonnageSheet metal
Multi-bend flat pattern
Flat length for tray, U and Z bends from legs, radius and K factor.
Open multi-bend flat patternSheet metal
Reverse K-factor from a test bend
Back-calculate K factor from measured flat versus formed dimensions.
Open reverse k-factor from a test bendSheet metal
Rectangular sheet nesting & yield
Parts per sheet, yield and offcut for rectangular nesting.
Open rectangular sheet nesting & yieldWelding
6 toolsWelding
Welding heat input
Estimate arc energy and corrected heat input per millimetre.
Open welding heat inputWelding
Fillet weld strength & required leg
Throat, capacity and required leg for a fillet weld.
Open fillet weld strength & required legWelding
Weld consumable quantity
Weld-metal and consumable mass from joint size, length and efficiency.
Open weld consumable quantityWelding
Carbon equivalent & preheat screening
IIW carbon equivalent as a preheat screening value only.
Open carbon equivalent & preheat screeningWelding
MIG starting settings
Indicative starting voltage and wire feed by material and thickness.
Open mig starting settingsWelding
Shielding gas flow & cylinder duration
Hours per cylinder and cylinders needed for a job.
Open shielding gas flow & cylinder durationStructural & materials
5 tools
Structural & materials
Metal weight calculator
Estimate plates, bars and pipes from dimensions and material.
Open metal weight calculatorStructural & materials
Beam deflection
Deflection and span ratio for common beam cases — screening only.
Open beam deflectionStructural & materials
Beam bending stress & section modulus
Bending stress, utilisation and required section modulus.
Open beam bending stress & section modulusStructural & materials
Section properties
Area, second moment, section and plastic modulus, radius of gyration.
Open section propertiesStructural & materials
Rebar weight and quantity
Estimate reinforcement bar count, length and theoretical weight.
Open rebar weight and quantityPiping & hydraulics
6 toolsPiping & hydraulics
Pipe flow and pressure drop
Estimate water velocity and straight-pipe friction loss.
Open pipe flow and pressure drop
Piping & hydraulics
Pipe weight per metre
Weight per metre from nominal size and schedule, or arbitrary OD and wall.
Open pipe weight per metrePiping & hydraulics
Pipe surface area calculator
Calculate outside surface area for coating and insulation work.
Open pipe surface area calculatorPiping & hydraulics
Tank volume calculator
Estimate rectangular and cylindrical tank capacity.
Open tank volume calculatorPiping & hydraulics
Pump head & power
Total head and shaft power from flow, pipe, static lift and efficiency.
Open pump head & powerPiping & hydraulics
Hydraulic cylinder force & speed
Push and pull force and speed from bore, rod, pressure and flow.
Open hydraulic cylinder force & speedMaterials & costing
5 toolsMaterials & costing
Material cost calculator
Estimate material spend from weight, rate and quantity.
Open material cost calculatorMaterials & costing
Labour hour calculator
Estimate labour hours and direct labour cost.
Open labour hour calculatorMaterials & costing
Fabrication job cost calculator
Build a practical estimate from material, labour and process cost.
Open fabrication job cost calculator
Materials & costing
Industrial unit converter
Convert common workshop length, weight and temperature units.
Open industrial unit converterMaterials & costing
Hardness conversion
Approximate conversion between HRC, HV and HB, with UTS estimate.
Open hardness conversionConstruction
6 toolsConstruction
Concrete volume calculator
Estimate concrete volume for slabs, footings and columns.
Open concrete volume calculatorConstruction
Brickwork & mortar
Bricks, wet and dry mortar, cement bags and sand for a volume.
Open brickwork & mortarConstruction
Plaster quantity
Wet and dry plaster, cement bags and sand for an area.
Open plaster quantityConstruction
Tile quantity & grout
Tiles and grout mass for an area, joint size and wastage.
Open tile quantity & groutConstruction
Excavation volume & haulage
Bank and loose volume and truck loads, with swell factor.
Open excavation volume & haulage
Construction
Paint and coating area calculator
Estimate paintable area, coverage and litres for a project.
Open paint and coating area calculatorLayout & measurement
5 toolsLayout & measurement
Right-triangle / 3-4-5 layout
Hypotenuse and angles from legs, or leg and hypotenuse, or leg and angle.
Open right-triangle / 3-4-5 layoutLayout & measurement
Chord, arc & sagitta
Chord, arc, sagitta and segment area from radius and angle.
Open chord, arc & sagittaLayout & measurement
Pulley & belt length
Open-belt length, ratio, driven speed and wrap angle.
Open pulley & belt lengthLayout & measurement
Gear ratio & pitch diameter
Pitch diameters, ratio, output speed and centre distance.
Open gear ratio & pitch diameterLayout & measurement
Sling angle & tension
Tension per leg from load, legs and sling angle — screening only.
Open sling angle & tension