Free timecode and film tools
Browser calculators for timecode, film, audio/picture relationships, storage and clock-drift estimates. Each tool keeps its assumptions beside the result.
Add or subtract signed timecode durations and convert between labels and frame counts. Choose the rate and DF/NDF mode, with physical playback seconds shown alongside the result.
Calculate timecode
Measure between source in and out marks. Set an exclusive or inclusive out point, and declare a confirmed next-day timecode wrap.
Find a clip durationRetain every picture and compare playback at two rates. See the source duration, new duration, speed percentage and duration change using exact fractional rates.
Compare playback ratesPlan nominal recording time for 16 mm, Super 16 or 35 mm. Set roll length, perf arrangement and reserve, then compare camera and playback rates.
Estimate roll runtimeFrom film requirements to label checks and hypothetical clock drift. Keep the assumptions with the answer.
Estimate exposed footage and whole rolls from finished runtime, shooting ratio, an allowance and the usable capacity of each roll.
Plan film requirementsValidate source labels at 29.97 or full-rate 59.94, then see the same frame position in both counting modes.
Check a timecode labelTurn stated ppm accuracy bounds and time since alignment into a worst-case separation and picture-frame equivalent.
Estimate clock driftKeep sample/frame relationships and media estimates explicit, from the chosen rates to the rounding and capacity assumptions.
Convert in either direction using exact rates. Keep the reduced fraction visible, choose whole-unit rounding and see its timing difference.
Convert samples and framesEstimate payload from a known bitrate or a declared uncompressed pixel layout. Compare decimal and binary units, copies and an extra capacity allowance.
Estimate media storageA timecode label, a picture count and elapsed playback time describe different quantities. Use timecode arithmetic for durations in one format; use in/out subtraction for positions in a continuous source; use a conform comparison when every source picture will play at a new rate.
These tools calculate values. An edit, retime, transcode, cadence conversion or audio pull still needs the appropriate media application and delivery checks.
Timecode mathematics and test examples · Search the glossary · Printable reference sheets
Use the technical guides to check the conventions before a production handoff.