Time Calculator
This calculator can be used to “add” or “subtract” two time values. Input fields can be left blank, which will be taken as 0 by default.
Add or Subtract Time from a Date
Use this calculator to add or subtract time (days, hours, minutes, seconds) from a starting time and date.
Time Calculator in Expression
Use this calculator to add or subtract two or more time values in the form of an expression. An acceptable input has d, h, m, and s following each value, where d means days, h means hours, m means minutes, and s means seconds. The only acceptable operators are + and -. “1d 2h 3m 4s + 4h 5s – 2030s” is an example of a valid expression.
Free Time Calculator – Add or Subtract Hours, Minutes, Seconds | EvolTools.com
Accurate Time Calculation Tools for Everyday Use
1. Basic Time Calculator
Quickly add or subtract time values with our simple calculator:
- Calculate total hours worked
- Determine time differences
- Perfect for time sheet calculations and meeting scheduling
How to use:
- Enter values in days, hours, minutes, seconds
- Click “Calculate” to see results
- Blank fields = 0 (default)
2. Date & Time Calculator
Add or subtract time from any date to find:
- Project deadlines
- Event countdowns
- Time until appointments
Features:
- AM/PM time format
- Calendar date picker
- “Now” button for current time
3. Advanced Time Expression Calculator
Calculate complex time expressions like:
1d 2h 30m + 4h 15m - 900s- Supports days (d), hours (h), minutes (m), seconds (s)
- Only + and – operators accepted
Why Use Our Time Calculator?
✔ 100% free online tool
✔ Mobile-friendly design
✔ Instant results
✔ No registration required
Common Time Conversions
| Unit | Equivalent |
|---|---|
| 1 day | 24 hours |
| 1 hour | 60 minutes |
| 1 minute | 60 seconds |
| 1 week | 7 days |
| 1 year | 365 days (366 in leap years) |
Related Helpful Calculators
- Date Calculator – Calculate days between dates
- Age Calculator – Determine exact age
- Hours Calculator – Track work hours
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Your trusted source for free online calculation tools since 2007
Key Features:
- Three calculation methods in one tool
- User-friendly interface
- Accurate results for all time calculations
- Works on all devices – desktop, tablet, mobile
Try our free time calculator today for all your scheduling and time management needs! ⏰
Pro Tip: Bookmark this page for quick access to time calculations whenever you need them!