To calculate the age of a person, a pet, a project, or even some device, you need to compute a number of complete years. The issue is that it doesn't seem enough to calculate a year's difference. Excel proposes a very useful formula that can help you to calculate that very fast.

Sometimes it is necessary to calculate a lifetime for some devices, things. Usually, a lifetime calculates in full months, for example, to check a warranty or guaranty period. Excel proposes a very useful formula that can help calculate that time.

For some projects or tasks, you might need to calculate how many days, months, or years left to some date or how many days, months, or years passed from some date till today. Excel proposes a very useful formula that can help you to calculate that very fast.

When you plan a project, you can need to calculate a number of workdays or full workweeks between the start and end dates, or how many workdays or workweeks left/passed. This tip is about an easy and fast way of calculation of full workweeks for weeks from Monday to Sunday.

When you plan a trip, project, etc. you can need to calculate a number of days or weeks between the start and end dates, or how many days or weeks left/passed. This tip is about an easy and fast way of complete weeks calculation.

When you compute subtotals in your spreadsheet, it can be necessary to select only subtotals and copy them to another sheet for future processing. If you select subtotals and copy them using copy-paste (Ctrl+C and Ctrl+V), Excel pastes all source data with subtotals. This tip demonstrates the workaround that allows you to copy just rows with subtotals.

For some charts or diagrams, you need to create a regular polygon – equiangular (all angles are equal) or equilateral (all sides have the same length). E.g., equilateral triangle, regular square, etc.

When you create a shape in your spreadsheet, it is created with the default style and any text that you type has the default font.

When you create a data table with daily records, you can need to highlight weekends or other specific days. You don't need to open a Calendar and do it manually; Excel proposes conditional formatting that can help you do it without any calculation.

When calculating the difference between two dates, you may want to exclude weekends and holidays. Excel proposes a standard formula for calculating the number of workdays for standard, five-day workweek. Also, Excel proposes a formula for calculating the number of workdays for different five-day workweek or six-day workweek.