Online Time Calculator – Add or Subtract Dates & Time

Calculate dates and times with precision

Select Time Unit

Press Enter to calculate

About the Online Time Calculator

What Is an Online Time Calculator?

The Online Time Calculator helps you easily add or subtract dates and time from any reference date. Whether you need to calculate a date 30 days from now, find what time it was 2 weeks ago, or compare time differences, this tool delivers fast, accurate, and reliable results.

Time Calculator Types & Examples

Years Ago Calculator

Years
1 year ago:Feb 2
5 years ago:Feb 2
10 years ago:Feb 2

Calculate exact dates by subtracting specific years from any date. Accounts for leap years automatically.

Months Ago Calculator

Months
1 month ago:Jan 2
3 months ago:Nov 2
6 months ago:Aug 2

Find dates by subtracting months. Handles varying month lengths (28-31 days) accurately.

Weeks Ago Calculator

Weeks
1 week ago:Jan 26
2 weeks ago:Jan 19
4 weeks ago:Jan 5

Calculate dates by weeks (7-day increments). Perfect for weekly planning and schedules.

Days Ago Calculator

Days
7 days ago:Jan 26
30 days ago:Jan 3
90 days ago:Nov 4

Find exact dates by subtracting days. Useful for deadlines and short-term planning.

Hours Ago Calculator

Hours
1 hour ago:09:31 AM
3 hours ago:07:31 AM
12 hours ago:10:31 PM

Calculate precise times by subtracting hours. Handles day boundaries correctly.

Minutes Ago Calculator

Minutes
15 min ago:10:16 AM
30 min ago:10:01 AM
60 min ago:09:31 AM

Find exact times by subtracting minutes. Perfect for precise timing and intervals.

Calculator TypeExamples from Current TimeDescription
Years Ago Calculator
Calculates dates years in the past
1 year ago:Feb 2, 2025
5 years ago:Feb 2, 2021
10 years ago:Feb 2, 2016
Calculate exact dates by subtracting specific years from current or any date.
  • •Accounts for leap years automatically
  • •Useful for historical research and age calculations
Months Ago Calculator
Calculates dates months in the past
1 month ago:Jan 2, 2026
3 months ago:Nov 2, 2025
6 months ago:Aug 2, 2025
Find dates by subtracting specific months from any date.
  • •Handles varying month lengths (28-31 days) accurately
  • •Perfect for financial planning and subscription tracking
Weeks Ago Calculator
Calculates dates weeks in the past
1 week ago:Jan 26, 2026
2 weeks ago:Jan 19, 2026
4 weeks ago:Jan 5, 2026
Calculate dates by weeks (7-day increments) from any reference date.
  • •Perfect for weekly planning and schedules
  • •Useful for work sprints and recurring events
Days Ago Calculator
Calculates dates days in the past
7 days ago:Jan 26, 2026
30 days ago:Jan 3, 2026
90 days ago:Nov 4, 2025
Find exact dates by subtracting specific days from any date.
  • •Useful for deadlines and countdowns
  • •Perfect for travel planning and medication schedules
Hours Ago Calculator
Calculates times hours in the past
1 hour ago:09:31 AM
3 hours ago:07:31 AM
12 hours ago:10:31 PM
Calculate precise times by subtracting hours from any time.
  • •Includes AM/PM format
  • •Handles day boundaries correctly
Minutes Ago Calculator
Calculates times minutes in the past
15 minutes ago:10:16 AM
30 minutes ago:10:01 AM
60 minutes ago:09:31 AM
Find exact times by subtracting minutes for precise timing.
  • •Perfect for precise timing and intervals
  • •Useful for cooking timers and exercise intervals

Note:All calculations based on current date: Feb 2, 2026

Tap on any calculator to try it live!

Key Features of This Time Calculator

  • Add or Subtract Time — Calculate minutes, hours, days, weeks, months, or years.
  • Custom Reference Date — Start calculations from any chosen date and time.
  • Ago or From Now — Instantly compute past or future dates.
  • Detailed Time Breakdown — View total minutes, hours, days, and weeks.
  • Day & Timestamp Info — Includes weekday and Unix timestamp.
  • Modern Online Tool — Clean UI with instant calculations and smooth animations.

Common Uses of the Time Calculator

  • Project Planning: Add days or weeks to calculate deadlines.
  • Software Development: Calculate time differences and timestamps.
  • Students & Educators: Learn date and time calculations easily.
  • Personal Scheduling: Plan future events or review past dates.

Tips for Accurate Time Calculations

Always double-check your reference date before calculating. Use “From Now” to plan future events and“Ago” to review past dates. Switching between time units allows you to visualize the same time difference in multiple formats for better clarity.