Work it out.
Calculators
Is my epoxy and isocyanate certificate valid?
BEK 1978/2021 § 16, § 30, subsections 7-8 + annex 10
Butt welding of PE pipes
DVS 2207-1 (as at 2023), via SIMONA work.info 10/2023
Clamping force in injection moulding
Tryk x areal (kraftberegning)
Shrinkage and tool dimensions
Svindformel S=(D-M)/D
Fibre weight percentage in a laminate
Massebroek (procentregning)
MEKP hardener for polyester resin
Producentdatablad (typisk ca. 1–2 vægt% MEKP, maks. ca. 3%)
Epoxy: resin/hardener mixing ratio
Producentdata (West System 105/206-datablad)
Laminate thickness from glass fibre layers
Kompositfysik (arealvægt-metode) — E-glas/harpiksdensitet
Gelcoat consumption per m²
Producentdatablad (NM Gelcoat, ca. 500 g/m² pr. lag)
Sandwich panel weight (foam core + laminate)
Producentdata (Diab Divinycell H-densiteter) + materialedensitet
Wall thickness in rotational moulding
Massefylde/geometri (ARM Design Guide, rotationsstøbning)
Extrusion: line speed
Massebevarelse (ekstruderingsfysik)
Welding rod consumption for plastic welding
Geometri (fugevolumen/rundt tværsnit)
Injection moulding: cooling time
Sprøjtestøbningsteori (Menges/Michaeli-køletidsligning)
Injection moulding: cycle time and capacity
Forholdsregning (kapacitetsplanlægning)
PE pipe: pressure class (SDR/PN)
ISO 12162 / DS/EN 12201 (PE-trykrør)
Part weight from volume and material
Materialedatablade (typiske densiteter)
Funnel and hopper
Exact flat pattern
Tub with fall and drain
Exact flat pattern
Channel and trough with fall
Exact flat pattern
Strip layout for a stamping die
Exact flat pattern
Tools that work in all subjects
Whatever your programme is called, these tools calculate the same — Pythagoras, area, percentages and units are not tied to one trade.
- Pythagorasa² + b² = c²Find the missing side, set out a right angle, check whether a room is square, and find the space diagonal.
- Area and perimeterm²Rectangle, triangle, trapezium, circle and composite shapes — area and perimeter.
- Volume and surface aream³ · lBox, cylinder, cone, sphere, pyramid, prism, pipe and frustum — also in litres.
- Percent%Percentage of, how many per cent, percentage change, discount and VAT.
- Scale and ratios1 : 50From drawing to reality, area and volume to scale, the rule of three and dividing in a ratio.
- Unit convertermm ↔ mFrom mm to km, Pa to bar and kB to GB — with the unit staircase.
- Time calculations and the clockt : minTime between two clock times, add time, and 1.75 h = 1 h 45 min for the timesheet.
- Slope and fall% · ° · 1:xFall from level to level, in per cent, per mille, degrees and mm per metre — and the height difference.
- Material consumption including wastem² + %Boards, paint, battens at c/c spacing and packs — for a composite surface or a whole room, with waste.