Time Converter

Time conversion comes up in project management, science, programming, and everyday planning. This converter handles all common time units in one step, showing every equivalent at once.

• Programming and APIs: Many systems use Unix timestamps (seconds). Convert durations to plan timeouts and intervals.
• Project planning: Convert a deadline in days to weeks or hours to understand time pressure.
• Science and physics: Express time intervals in consistent units for calculations.
• Billing and rates: Convert hourly rates to daily, weekly, or monthly rates for proposals or invoices.

1. 1Enter the time value you want to convert.
2. 2Select the source unit from the dropdown (seconds, minutes, hours, days, weeks, months, or years).
3. 3The calculator converts the value to seconds internally.
4. 4It then divides by each unit's second-equivalent to show all conversions.
5. 5Month uses 30.4375 days average; year uses 365.25 days.

• Using 30 days for a month: This calculator uses 30.4375 days per month (365.25 ÷ 12). If you manually use 30, your monthly conversion will be slightly off for large values.
• Confusing elapsed time with timestamps: This converter handles durations, not clock times. 90 minutes is 1.5 hours as a duration, but "90 minutes past noon" is 1:30 PM on a clock. They are different things.
• Converting seconds from a Unix timestamp as a duration: Unix timestamps are seconds since January 1, 1970. Converting a 1.7-billion-second timestamp as a duration gives 54+ years, which is correct but rarely what you need.
• Forgetting that a year is 365.25 days here: The calculator uses Julian years (365.25 days). Calendar years alternate between 365 and 366. For exact multi-year conversions, the small difference adds up.

• Use seconds as a common currency: When converting between unusual time units, convert to seconds first. Once you have seconds, any other conversion is a single division. The calculator does this internally.
• Cross-check programming timeouts: API timeouts are often in milliseconds, database TTLs in seconds, and cache expiry in minutes. Use this calculator to sanity-check that a 86400-second TTL is actually one day.
• Convert billing rates between periods: A $50/hour rate is $400/day (8-hour day) or $104,000/year (260 working days). Use this calculator alongside a percentage or ROI calculator to build out rate comparisons.
• Check both units when using the result: If you convert 2.5 days to hours and get 60, double-check by converting 60 hours back. This catches unit-selection errors before they propagate into a larger calculation.