Date & Time Calculators

Choose Your Date & Time Calculator

What Can You Calculate with These Tools?

Our date and time calculator collection covers every common scenario from everyday life, work, and planning. Whether you need to track hours worked, plan a project deadline, check if food has expired, or simply convert between time units, we have a dedicated tool for it.

Time Calculations

The Time Calculator handles adding and subtracting time durations and finding the gap between two times — including overnight shifts. The Hour Calculator specializes in work hours with break deductions and a weekly time card feature for payroll. The Minute Calculator focuses on minute-precision time math.

Date Range Calculations

Use the Date Difference Calculator for exact days between dates, the Week Calculator for weekly intervals, and the Month Calculator for monthly spans. The Working Days Calculator strips out weekends and holidays for business day counts.

Planning and Deadlines

The Deadline Calculator lets you work forward from a start date to find when N days or weeks from now lands — or count down to a known deadline. The Date Duration Calculator adds or subtracts any combination of years, months, and days from a starting date. The Date Countdown Calculator gives you a live timer to any future event.

Expiry and Time Conversion

The Expiry Date Calculator determines when products expire based on purchase date and shelf life — with presets for common items. The Time Converter converts a value in any time unit (seconds, minutes, hours, days, weeks, months, years) into all other units simultaneously.

People Also Search For

How to calculate time between two dates in days, weeks, and months

To calculate time between two dates, use the Date Difference Calculator — enter your start and end dates and it instantly shows the gap in days, weeks, months, years, and business days simultaneously. For days only, divide the day count by 7 for weeks, or by 30/31 for approximate months. For precise months accounting for unequal month lengths, the Month Calculator handles this automatically.

How to add days to a date to find a future date

Use the Date Duration Calculator to add any number of days, weeks, months, or years to a starting date. Enter your start date, select "Add," enter the duration (e.g., 30 days), and the result date appears instantly. This is ideal for calculating contract end dates, subscription renewals, notice periods, and warranty expiry dates.

How to calculate hours worked including lunch breaks

Use the Hour Calculator — enter your clock-in time, clock-out time, and break duration in minutes, and it deducts the break automatically to show net hours worked. The weekly time card mode lets you enter up to 7 days of shifts and totals them for payroll. It outputs both decimal hours (e.g., 7.5) and hours:minutes format (7h 30m).

How to find how many days until a specific date

Use the Date Countdown Calculator or the Time Until Calculator — both show how many days (and hours, minutes, seconds) remain until any future date. The Time Until Calculator updates in real time with a live countdown. The Date Countdown Calculator is ideal for event planning, tracking days until a birthday, vacation, or deadline.

How to convert hours to minutes and seconds

Use the Time Converter — enter any value in hours and it instantly shows the equivalent in minutes, seconds, days, weeks, and months all at once. For example, 2.5 hours = 150 minutes = 9,000 seconds. No manual math needed — all conversions appear simultaneously as you type.

How to calculate a deadline date from today

Use the Deadline Calculator — enter today as the start date and your deadline duration (e.g., 30 days, 6 weeks), and it calculates the exact deadline date with calendar and business day breakdowns. It also works in reverse: enter a known deadline date to find how many days remain. Business day mode excludes weekends for accurate work deadlines.

Frequently Asked Questions