Live · beginner
Metric tapping drill size
Find the correct starting hole for a metric internal thread.
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Smart tools for real workshop work.
Free online industrial calculators and simple guides for fabrication, machining, welding and construction.
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Live · beginner
Metal weight calculator
Estimate the weight of plates, bars and pipes.
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Industrial unit converter
Convert common workshop length, weight and temperature units.
Open tool →Live · beginner
Brickwork & mortar
Bricks, mortar, cement bags and sand for a volume.
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Find the right industrial calculator by job.
Choose the work you are doing and go straight to the relevant tools.
Drilling
3 calculatorsDrill speed, feed and machine-load estimates.
Tapping and threads
2 calculatorsChoose starting holes and practical clearance sizes.
Cutting and machining
3 calculatorsPlan cutting time, milling speed and turning feed.
Welding
1 calculator + guideChoose joint types, plan fabrication and estimate welding heat input.
Measuring and layout
3 calculatorsConvert units, lay out bolt circles and estimate sections.
Estimating and costing
3 calculatorsBuild material, labour and fabrication cost estimates.
Piping and capacity
3 calculatorsWork with pipe flow, surface area and tank volume.
Sheet metal and sections
2 calculatorsEstimate bend development and common metal profiles.
Construction
3 calculatorsEstimate brickwork, plaster and tile quantities.
Structural & lifting
3 calculatorsScreen beams, sections and sling loads — qualified-person checks still apply.
WORKSHOP PROBLEM SOLVER
Why is my tap breaking?
Check alignment, drill size, chip control, lubrication and material before forcing the tap.
Read the diagnostic guide →REFERENCE LIBRARY