Work it out.
Calculators
Dilution of a solution
Fortyndingsloven C1·V1 = C2·V2
Mixing two concentrations
Massebalance
Percentage yield
Procentregning
Residence time in tank/reactor
Procesteknik (opholdstid τ = V/Q)
Heat required to heat a liquid
Termodynamik (Q = m·c·ΔT)
Pump power (hydraulic power)
Hydraulik (P = ρ·g·Q·H/η)
ppm dosing of chemical
Vandbehandling/dosering (1 ppm i 1 m³ = 1 g rent stof)
Water hardness — conversion between units
Vandkemi (1 °dH = 17,848 mg/L CaCO₃)
Batch scaling of a recipe
Forholdsregning (lineær skalering)
Tank volume (cylindrical tank)
Geometri (V = π·r²·h)
Takt time on the production line
Lean-produktion / Toyota Production System
OEE — overall equipment effectiveness
OEE (Overall Equipment Effectiveness, ISO 22400-2)
Mass, volume and density
Massefylde (m = ρ · V)
Normal cubic metres (Nm³) — gas correction
Idealgasloven (normbetingelser: DIN 1343, 0 °C / 1013,25 mbar)
Flushing/rinsing time in a tank
Procesteknik (eksponentiel udvaskning, CSTR)
Tank and vessel
Exact flat pattern
Funnel and hopper
Exact flat pattern
Truncated cone and reducer
Exact flat pattern
Nozzle in a shell
Exact flat pattern
Dished end cap
Approximate flat pattern
Screw conveyor flight
Approximate flat pattern
Tank support — saddle, legs and skirt
Exact flat pattern
Tub with fall and drain
Exact flat pattern
Channel and trough with fall
Exact flat pattern
Two-part valve cover
Exact flat pattern
Flange box
Exact flat pattern
Strip layout for a stamping die
Exact flat pattern
Cyclone and dust separator
Exact flat pattern
Archimedean spiral
Exact flat pattern
Elliptical cone
Approximate flat pattern
Orange-peel sphere
Approximate flat pattern
Square tube cross
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.