Why rounding each entry changes the total
Two seven-minute entries become 24 minutes when each rounds up to a six-minute increment. Add them together first, and the 14-minute total rounds up to 18 minutes.
Both calculations use the same increment. The difference is where rounding happens. To reconcile a result with another system, match both the increment and whether it applies per entry or to the combined total.
The calculator uses round-up billing increments and ignores fractional minutes. It does not model rounding to the nearest increment. Our billing increments reference covers the methods and conversion charts.
Notes on the calculated amount
- One hourly rate applies to all entries. Entries with different rates need separate calculations.
- Amounts are calculated from minutes, before tax, discounts or other invoice adjustments. The displayed decimal hours are rounded to two places.
- Currency selection changes the currency shown; it does not convert the rate using an exchange rate.
For example, 10 minutes at $300 an hour is $50. Multiplying the displayed 0.17 hours by $300 gives $51 because the displayed hours have already been rounded. The minutes to decimal hours converter includes a reference chart and spreadsheet formulas for checking these values.
