A time calculator is an algorithmic digital tool that can be used to add/subtract various time-values and make different types of time calculations such as finding date time calculator the time difference between two important events, determining the date 3 years before today, knowing how many hours, minutes or seconds are there in a year, etc.
Basic things to know while making time calculations
Time, as we know it, can range from several years to a few seconds. So, while making calculations using the above calculators, it’s important to know some basic units of time and the calendar system used for designing these calculators.
These calculators use the Georgian calendar to make calculations. In this calendar, a year is divided into 365 days, with the exception of a leap year, which has 366 days. The total number of days in a calendar year are categorized into 12 months of varying lengths. Each month either has 30 or 31 days, except the month of February which has 28 days in a normal year and 29 days in a leap year.
How do the calculators work?
The first calculator basically lets users determine the sum or the difference between two time-values. Here, time values are represented in terms of days, hours, minutes and seconds.
The input section of the calculator has two rows consisting of the value fields ‘Day’, ‘Hour’, ‘Minute’ and ‘Second’ in each row and two buttons to select either ‘Add+’ or ‘Subtract-’ placed in between those two rows. Similarly, the output section has a row consisting of all the value fields that are present in the input rows.
The input provided can either be in whole numbers or decimal, but they should be positive rational numbers. The value entered in the first row of the input section can either be greater or smaller than the value entered in the second row. Additionally, if need be, users can choose to leave any of the value fields or multiple value fields in the input section blank.
The output displayed is either a positive or a negative value based on the input provided and the function (+ or -) chosen. The output time value also consists of the value fields ‘Day’, ‘Hour’, ‘Minute’ and ‘Second’. Additionally, this calculator also displays the result in terms of days, hours, minutes and seconds individually.
The second calculator can either add a time value to or subtract a time value from a particular date and a certain time on that date.
Here, the upper part of the input section is called ‘Start Time’. The ‘Start Time’ consists of two sub-sections. One where the date is to be filled and another where the time. By default, the ‘Start Time’ initially shows the current date and time. The date can either be filled by filling up all the required sections i.e. month, date and year individually or by clicking on the calendar button. The input for the time part can be provided by entering relevant values in the ‘Hour’, ‘Minute’ and ‘Second’ sections and choosing either ‘AM’ or ‘PM’ from the drop-down menu beside it.
The lower part of this calculator has the value fields ‘Day’, ‘Hour’, ‘Minute’ and ‘Second’ to provide input for the time-value that is to be added or subtracted from the concerned date and time. Users can choose either to add or subtract the time-values from the middle section by clicking either on the ‘Add+’ or the ‘Subtract-’ button.
The result displayed is a date and a time on that date which is either before or after the date in the ‘Start Time’ field depending on the function (add or subtract) chosen.
In the third calculator, time-values based calculations can be carried out using mathematical expressions. The mathematical expressions used in this calculator are made up of days, hours, minutes and seconds which are denoted by the letters ‘d’, ‘h’, ‘m’ and ‘s’ respectively.
Just like the previous calculators, this calculator can also only perform addition and subtraction of time-values. The time-values provided as input to this calculator should be a number accompanied by the letter which represents its unit.
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