Work it out.
Calculators
OEE – the plant's effectiveness
OEE-standard (Lean/TPM)
Yield and rejection percentage
Procentregning (yield/scrap)
Optimal order quantity (EOQ)
Wilsons formel (EOQ)
Takt time
Lean/TPM – takttid
SMED – changeover savings
SMED (Shigeo Shingo, Lean-metode)
Line balance and bottleneck
Lean – linjebalancering
Process capability (Cp/Cpk)
Statistisk proceskontrol (SPC) – Cp/Cpk
MTBF, MTTR and availability
EN 13306 – vedligeholdsterminologi (MTBF/MTTR)
Safe lifting quantity per day
AT guidance on ergonomic working environment (VEJ no. 10133 of 01/10/2026)
Noise dose (LEX,8h)
Arbejdstilsynet – støjbekendtgørelsen (LEX,8h)
Energy consumption and electricity cost per part
Forholdsregning (energiforbrug/elpris)
Safety stock and reorder point
Lagerstyring – sikkerhedslager/genbestillingspunkt (statistisk servicefaktor)
Boxes per pallet (EUR pallet)
Geometri (EUR-palle 800×1200 mm, EN 13698)
First pass yield (FPY) and rolled throughput yield (RTY)
Lean Six Sigma – First Pass Yield / Rolled Throughput Yield
Labour cost per unit produced
Forholdsregning (produktionsøkonomi)
Tank and vessel
Exact flat pattern
Funnel and hopper
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.