The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours. In the first example the result is 0.5 hours below the prep-hour limit you set this month.
The calculator does not build a schedule and does not book a desk. In-person meetings are optional and do not change the main result. The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours.
Enter data and click Calculate.
The calculator uses the numbers you enter. The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours. In the first example the result is 0.5 hours below the prep-hour limit you set this month.
The five form fields are swaps, prep, last-minute changes, change cost, and prep limit. Swap prep means: Office/home swaps times prep minutes, compared with the hour limit you set. In the first example the result is 0.5 hours below the prep-hour limit you set this month. Last-minute changes means: Sudden changes in a month, then multiplied by the cost of one. They appear in the grid and do not change prep hours. Prep limit means: The hours you set for swap prep in a month. In the first example they are 3 hours.
The second example gives 3.7 hours below the prep-hour limit you set this month. The third example gives 4 hours above the prep-hour limit you set this month. The calculator uses the numbers you enter: 6 swaps of 25 minutes. That is 2.5 hours versus the 3 hours you set. The result is 0.5 hours below the prep-hour limit you set this month.
The calculator does not build a schedule and does not book a desk. In-person meetings are optional and do not change the main result.
Enter 6, 25, 2, 40, 3, then click Calculate. A comma in 12.5 is read the same way as a period.
The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours.
In the first example the result is 0.5 hours below the prep-hour limit you set this month. The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours.
0.5 hours below the prep-hour limit you set this month
The calculator uses the numbers you enter: 6 swaps of 25 minutes. That is 2.5 hours versus the 3 hours you set. The result is 0.5 hours below the prep-hour limit you set this month.
3.7 hours below the prep-hour limit you set this month
Two swaps of 10 minutes versus the 4 hours you set. The result is 3.7 hours below the prep-hour limit you set this month.
4 hours above the prep-hour limit you set this month
Twelve swaps of 40 minutes. That is 8 hours versus the 4 hours you set. The result is 4 hours above the prep-hour limit you set this month.
The calculator uses the numbers you enter: 6 swaps of 25 minutes. That is 2.5 hours versus the 3 hours you set. The result is 0.5 hours below the prep-hour limit you set this month. The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours.
The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours.
The result is 3.7 hours below the prep-hour limit you set this month.
The result is 4 hours above the prep-hour limit you set this month.
The calculator does not build a schedule and does not book a desk. In-person meetings are optional and do not change the main result.
No. The primary result comes from office/home swaps, prep minutes, and the hour limit. Last-minute cost sits in the grid. In-person meetings are optional.
Office/home swaps times prep minutes, compared with the hour limit you set. In the first example the result is 0.5 hours below the prep-hour limit you set this month. Sudden changes in a month, then multiplied by the cost of one. They appear in the grid and do not change prep hours. The hours you set for swap prep in a month. In the first example they are 3 hours.
Yes. 12.5 and 12,5 are read the same way.
The calculator multiplies office/home swaps by the prep minutes of one swap and divides by 60. It compares that sum with the prep-hour limit you set for yourself. The result shows spare time or an overage in a month. The grid also shows last-minute cost and the share of the limit. In-person meetings are optional and do not change the hours. The calculator does not build a schedule and does not book a desk. In-person meetings are optional and do not change the main result.
Page updated in 2026.
