Time Calculator

Time Calculator

Add or subtract two lengths of time.

First duration

days

hours

minutes

seconds

Operation
Second duration

days

hours

minutes

seconds

Example

This is a sample result, not your calculation. Enter your own values to replace it.

Enter two durations, choose add or subtract, then calculate the result.

Calculated time

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In seconds

Total seconds
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Check your entries

Enter at least one duration value (numbers, 0 or more) to calculate.

Add or Subtract Time from a Date

Start from a date and time, then move forward or back.

Operation
Amount

days

hours

minutes

seconds

Example

This is a sample result, not your calculation. Enter your own values to replace it.

Enter a start date and time, then how much time to add or subtract.

Resulting date

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—

How it was reached

From
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Amount
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Days crossed
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Check your entries

Enter a start date and time and how much to add or subtract.

Time Expression Calculator

Add and subtract several times at once by writing them out.

Put a unit after every value — d days, h hours, m minutes, s seconds — and join them with + or −.

Example

This is a sample result, not your calculation. Enter your own values to replace it.

Write an expression such as 1d 2h 3m 4s + 4h 5s and calculate it.

Result

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In other forms

In words
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Total seconds
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Clock time (hh:mm:ss)
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Check the expression

Every value needs a unit — d, h, m or s — joined by + or −.