Work it out.
Calculators
Fertiliser quantity from nitrogen target
Procentregning
Filling a field sprayer
Ratio arithmetic
Top dressing — quantity of sand
Geometry (volume)
Nozzle calibration with the 600 formula
Sprøjteteknik (600-formlen, TeeJet/VKST)
Calibrating a fertiliser spreader
Forholdsregning (kalibreringsmetode)
Spiking/hollow tining — affected area proportion
Geometri + USGA Green Section
Sand for filling spike holes
Geometry (volume)
Overseeding — seed quantity for greens
Producentdata (DLF Masterline)
Growing degree days (GDD) — interval for growth regulation
GDD-model, basis 0 °C (Crop Science)
Green speed on a sloping green (Brede formula)
USGA Stimpmeter + Brede-formlen
Clipping capacity and time required
Forholdsregning (kapacitetsformlen)
Watering time for sprinklers
Forholdsregning (1 mm = 1 l/m²)
The 1/3 rule — cutting height and cutting frequency
1/3-reglen (USGA/turfgrass-forskning)
Bunker sand — quantity for renovation
Geometri (rumfang) + USGA-tommelfingerregel
Water consumption and irrigation economics
Forholdsregning (1 mm = 1 l/m²)
Number of tank fills for the spraying
Ratio arithmetic
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.