Work it out.
Calculators
Video file size from bitrate
Databeregning (8 bit = 1 byte)
Recording time on a memory card
Databeregning (8 bit = 1 byte)
Illuminance at distance (inverse square law)
Fysik: afstandsloven (1/r²)
Depth of field and hyperfocal distance
Optik: hyperfokal-formel (Zeiss/CoC-standard)
Exposure equivalence when changing aperture
Fotografisk optik (N²/t-forhold, APEX-eksponeringssystemet)
Shutter speed by the 180-degree rule
Filmkonvention (180-graders lukkerregel)
Timecode: time to frames
SMPTE 12M-timecode-standard
Battery time for camera/lighting equipment
Elektroteknik (energi = effekt × tid)
Sound pressure (dB SPL) at a new microphone distance
Akustik: afstandsloven for lydtryk (punktkilde, frit felt)
Loudness normalisation for broadcast (EBU R128)
EBU R128 (europæisk/dansk broadcast-loudnessstandard)
Subtitle duration (reading speed)
Netflix Timed Text Style Guide (branchestandard for læsehastighed)
Gimbal/tripod head: is the rig too heavy?
Producentdata (DJI/Manfrotto specifikationer)
Transfer time for recordings
Databeregning (USB-IF/Thunderbolt-specifikation)
RAID disk space (usable capacity)
Diskteknologi (RAID-niveauer, SNIA-standarddefinition)
Slow-motion playback time (overcranking)
Filmteknik (fps-forhold ved overcranking/undercranking)
Timecode: duration from in to out
SMPTE ST 12-1 timecode (TT:MM:SS:FF), non-drop-frame
Colour temperature and gel (mired)
Mired = 1,000,000 ÷ K; LEE 204 Full CTO = +159, LEE 201 Full CTB = −137 mired (leefilters.com)
Light on location: power on a circuit
Power formula I = P ÷ U (single-phase 230 V)
Shoot schedule: manuscript pages to shoot days
Industry rule of thumb: 1 script page ≈ 1 minute screen time; pages counted in eighths
Letterbox: active image in frame
Image format: active height = frame width ÷ aspect ratio (SMPTE/DCI 1.85:1 and 2.39:1)
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.