Professional Detailing2 min read

Coating Job Time Records: Decimal Hours Are Not Hours and Minutes

A value written as 1.30 can be mistaken for one hour thirty minutes when a spreadsheet interprets it as decimal hours. Define the time format before using job records for coating labour estimates.

Updated · NANOLAB Knowledge

The key distinction

Decimal hours express fractions of an hour, while clock-style notation expresses hours and minutes. The difference can materially affect costs and capacity calculations. Keep raw start and finish times or a clearly labelled duration field, and convert through a checked formula rather than relying on visual similarity.

Practical checks

  1. Choose one duration format for operational records.
  2. Label the units and validate imported data.
  3. Check representative conversions before using the dataset for pricing or scheduling.

Example

Arithmetic example: one hour thirty minutes equals 1.5 decimal hours. A value of 1.30 decimal hours equals one hour eighteen minutes. Treating those as identical understates a ninety-minute task by twelve minutes and can compound across many jobs.

Scope and limits

These figures illustrate unit conversion, not a NANOLAB installation time. Do not mix active labour with cure or waiting time in the same field. The job estimate should preserve the different time categories needed to answer the actual staffing, pricing or scheduling question.

Related guidance

Ask NANOLAB about the exact product and intended use. Use the current product documentation for formulation-specific instructions.