Work out labelling cost instantly with clear inputs, formula shown and shareable results.
Labelling cost is driven by redundancy as much as by volume: three annotators per item triples both the hours and the bill, but is what makes majority voting and agreement measurement possible. Converting seconds per label into hours and multiplying by the loaded hourly rate gives the true figure, and cost per item is the number to compare against the value of the model it enables.
Labelling cost
annotations = items x annotators per item; hours = annotations x seconds / 3600; cost = hours x hourly rate
For subjective or ambiguous tasks yes, because it lets you measure agreement and resolve ties. For unambiguous tasks, single labelling with a small audited sample is far cheaper.
Bounding boxes, segmentation masks, long documents and tasks requiring a guideline lookup. Pilot on 100 items and measure before extrapolating.