⏰ Time Calculator

Add, subtract, and calculate time values with precision

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 -.

Example: '1d 2h 3m 4s + 4h 5s - 2030s + 28h' is a valid expression

Quick examples

  • Add time: 2 hours 30 minutes + 1 hour 45 minutes = 4 hours 15 minutes
  • Subtract time: 5 hours 20 minutes - 2 hours 35 minutes = 2 hours 45 minutes
  • Time difference: 9:30 AM to 3:45 PM = 6 hours 15 minutes
  • Convert units: 90 minutes = 1 hour 30 minutes, 2.5 hours = 2 hours 30 minutes

Frequently Asked Questions

What is this calculator used for?

This calculator helps you perform specific calculations quickly and accurately. Each calculator is designed with a user-friendly interface to solve particular types of mathematical, financial, or health-related problems.

Is my data stored or tracked?

No, all calculations are performed locally in your browser. We prioritize your privacy and don't store or track any of your personal data. Your information never leaves your device.

How accurate are the results?

Our calculators use industry-standard formulas and algorithms to ensure high accuracy. However, for critical financial, medical, or legal decisions, we recommend consulting with a qualified professional.

Can I use this calculator offline?

Yes! CalcBuddy is a Progressive Web App (PWA) that works offline. After your first visit, you can use all calculators even without an internet connection.

Is this calculator free to use?

Absolutely! All calculators on CalcBuddy are completely free to use with no hidden fees, subscriptions, or advertisements. We believe in providing valuable tools to everyone.

How do I report an issue or suggest improvements?

We appreciate user feedback! You can contact us through our support channels to report bugs, suggest new features, or request additional calculators.

Free online time calculator. All calculations happen locally in your browser for privacy.