If you allow too much tax to be withheld, you get a refund. You can determine how much is tax is taken out of your pay by the number of allowances you claim on your W-4. The W-4 has a worksheet to help you figure out how many personal allowances to take.
Step 5: Predict your next period. Now that we know how long your period cycle is, we can just use it to count the days to predict your next period. My period cycle is 28 days so if I count 28 days from February 10, that's when my next period should come.
If both dates are valid, a result box will be displayed with the period information, i.e. the exact number of days between the given dates and also the numbers of weeks, months and years. Please note, that the number of days is always exact, the numbers of months and years may be rounded to the nearest full value. For example, if the period calculated equals to 33 days, the calculator will show approx. 1 month as a result. Our calculator will validate the dates you entered, and the result will be shown if both are valid.