Free Time Calculator - Time Math Made Easy
Add, subtract, multiply, and divide time. Calculate time differences, convert between time formats, and solve time-related math problems.
Quick Answer
To add time: add hours and minutes separately, carry 60 min as 1 hour. 2:45 + 3:30 = 6:15. Convert to decimal: 3:45 = 3.75 hours.
Key Facts about Time Calculator:
- 60 seconds = 1 minute
- 60 minutes = 1 hour
- 24 hours = 1 day
- 3:30 = 3.5 hours decimal
- Carry/borrow at 60
Why Use Our Time Calculator?
Complete time calculations:
Add Time
Add hours and minutes.
Subtract Time
Find time differences.
Convert Formats
Decimal to time.
Duration
Calculate elapsed time.
Instant Results
Get answers immediately.
100% Private
Your data stays private.
How to Time Calculator in 3 Easy Steps
Calculate time:
Enter Times
Hours, minutes, seconds.
Choose Operation
Add, subtract, convert.
Get Result
See calculated time.
Common Use Cases for Time Calculator
Perfect for:
Frequently Asked Questions
Everything you need to know about our time calculator
How do I add time together?
Add each unit; carry when exceeding 60
Add hours, minutes, and seconds separately. If minutes exceed 60, carry to hours. 2:45 + 1:30 = 3:75 = 4:15 (75 min = 1 hour 15 min).
How do I convert time to decimal?
Hours + (minutes ÷ 60). Example: 3:45 = 3.75 hours
Divide minutes by 60 and add to hours. 3 hours 45 minutes = 3 + (45/60) = 3.75 hours. 2:30 = 2.5 hours.
How do I calculate elapsed time?
End time minus start time, borrowing from hours for minutes
Subtract start from end, borrowing as needed. 5:15 PM - 9:30 AM: convert to same format, subtract = 7 hours 45 minutes.
Still have questions? Try the tool yourself!
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