Understand different compensatory-rest calculations, convert premium rates into time and track balances without mixing distinct schemes.
“Taking time back” can describe several different mechanisms. Before converting hours into rest, identify which arrangement the rest comes from.
The compensatory rest calculator handles configurable arithmetic; it does not decide which legal mechanism applies.
French official guidance allows overtime pay to be replaced wholly or partly by equivalent compensatory rest under the applicable arrangements.
The arithmetic is straightforward: one hour that would otherwise be paid with a 50% premium corresponds to 1 h 30 of equivalent rest. At a 25% premium, the equivalent is 1 h 15.
This example explains equivalence once the arrangement exists; it does not mean every employee can freely convert any overtime hour.
Four hours converted at 125% give 4 × 1.25 = 5 hours of rest.
When a calculator asks for the total conversion rate, enter 125%, not 25%. The latter represents only the additional portion and would omit the base hour.
Some overtime arrangements also involve an annual quota or reference limit and mandatory compensatory rest under specified conditions.
That is a different question from replacing premium pay with equivalent rest. The calculator therefore also allows a configurable annual reference.
See Overtime: how to calculate it and understand premiums before calculating the rest derived from overtime.
Keep the originating hours, applicable conversion rate, rest earned and rest already taken as separate fields. A single final balance is difficult to audit later.
For example, 2 hours at 125% produce 2 h 30; 1 hour at 150% produces 1 h 30; 3 hours at 125% produce 3 h 45. Together, six source hours produce 7 h 45 of rest in this arithmetic example.
1.5 hours means 1 h 30. 1.25 hours means 1 h 15. Writing 1.30 to mean 1 h 30 mixes decimal notation with clock notation.
Use the decimal hours converter before feeding a balance into a spreadsheet.
Night work and some Sunday-work arrangements can create their own compensatory measures. Those rights do not necessarily have the same origin or calculation as rest replacing overtime pay.
Label the source in your records, for example “overtime replacement”, “night compensation” or “Sunday arrangement”. See night work and Sunday/public-holiday work.
If the source hours are wrong, a mathematically perfect conversion still produces a wrong balance. Use the work hours calculator for daily durations and the Excel timesheet generator for monthly records.
“Compensatory rest” can refer to distinct mechanisms. Identify the rule creating the rest before choosing a percentage.
Once that is clear, the arithmetic is simple: source hours multiplied by the appropriate conversion rate, with careful conversion between decimal hours and hours/minutes.
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