Work it out.
Calculators
Seed rate
Arable farming
Nitrogen (N) for the field
Arable farming
Energy-corrected milk (ECM)
Sjaunja et al. 1990
Seed rate by thousand-grain weight
Markbrug (TKV-metoden)
Field capacity for implements
Geometry
Effective nitrogen in livestock manure
Landbrugsstyrelsen (gødsknings- og harmoniregler)
Harmony area and livestock density
Landbrugsstyrelsen (harmoniregler) — 1 DE = 100 kg N
Treatment index (BI) for a spraying
Miljøstyrelsen (behandlingshyppighed)
Sprayer: tank fills and mixing
Ratio arithmetic
Daily growth
Ratio arithmetic
Bunker silo: volume and feed quantity
Geometri + densitet (indtastes)
Quantity of grain in storage
Rumvægt (Lex — kornvægt)
Irrigation quantity and irrigation time
Enhedsomregning (1 mm = 10 m³/ha)
Slurry tank: volume and storage period
Geometry
Number of bales from the field
Ratio arithmetic
Contribution margin for a cash crop
Contribution margin model (SEGES Innovation, budget calculators and Farmtal Online)
Feed efficiency for pigs for slaughter
SEGES Innovation, Danish average for productivity 2024 (note 2505): 2.57 FEsv/kg gain, 30–115 kg
Weaned piglets per sow per year
SEGES Innovation, Danish average for productivity 2024 (note 2505): 35.6 weaned per sow per year, 15.9 per litter, 21.7% piglet mortality
Complete feed: from feed plan to mixer
Feed plan in kg dry matter (NorFor) — fresh weight = kg dry matter ÷ dry matter percentage
Funnel and hopper
Exact flat pattern
Screw conveyor flight
Approximate flat pattern
Tub with fall and drain
Exact flat pattern
Channel and trough with fall
Exact flat pattern
Cyclone and dust separator
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.