Work it out.
Calculators
Hydraulic cylinder force
Pascals lov · F = p·A
Steel plate weight
Densitet stål 7850 kg/m³ · EN 10025-2
Ohm's law and power
Ohms lov · U = R·I
Cutting speed and spindle speed
Skæredata (Sandvik Coromant / fagteori.dk)
Tap drill hole for thread tapping
ISO 724 gevindtabel (fagteori.dk / hpholm.dk)
Tightening torque for bolts
Tilspændingsmoment-tabel (bolte.dk, styrkeklasse 8.8, olieret)
Engine power from torque and engine speed
Mekanik-formel · P = 2π·n·T
Fuel consumption from SFOC
SFOC-nøgletal (motorfabrikant-data, fx MAN B&W)
Compression ratio in a diesel engine
Motorgeometri · ε = (Vd+Vc)/Vc
Anode consumption for cathodic protection
DNV-RP-B401 (katodisk beskyttelse, offer-anode-design)
Flow velocity in a pipe system
Kontinuitetsligning (Geometri) · vejledende v-grænser Hydroscand
Belt and gear ratio
Geometri/Forholdsregning
Cooling requirement in a heat exchanger
Termodynamik · Q = ṁ·cp·ΔT (cp vand = 4,18 kJ/(kg·K))
Buoyancy when lifting underwater
Arkimedes' lov · opdrift = fortrængt væskemasse
Pipe fluid content
Geometri · V = π·r²·L
Bent bracket
Exact flat pattern
Edge-bent panel
Exact flat pattern
Rectangular elbow
Exact flat pattern
Square-to-round transition
Approximate flat pattern
Rectangle-to-rectangle transition
Exact flat pattern
Truncated cone and reducer
Exact flat pattern
Nozzle in a shell
Exact flat pattern
Dished end cap
Approximate flat pattern
Tee and lateral
Exact flat pattern
Breeches piece
Exact flat pattern
Segmented pipe elbow
Exact flat pattern
Screw conveyor flight
Approximate flat pattern
Flat plate, flange and blank
Exact flat pattern
Tank support — saddle, legs and skirt
Exact flat pattern
Rectangular duct, straight section
Exact flat pattern
Tub with fall and drain
Exact flat pattern
Channel and trough with fall
Exact flat pattern
Part-cylindrical jacket
Exact flat pattern
Stair stringer
Exact flat pattern
Wheel arch repair panel
Exact flat pattern
Two-part valve cover
Exact flat pattern
Flange box
Exact flat pattern
Nozzle with tab collar on a flat wall
Exact flat pattern
Strip layout for a stamping die
Exact flat pattern
Archimedean spiral
Exact flat pattern
Elliptical cone
Approximate flat pattern
Pipe-to-square transition
Approximate flat pattern
Orange-peel sphere
Approximate flat pattern
Square tube cross
Exact flat pattern
Cable tray
Exact flat pattern
Box and tray
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.