Time Unit Converter

How time conversion works in seconds: Enter any value, pick a source unit from seconds through years, then pick a target unit to get an instant result normalized through exact second factors. The engine multiplies into seconds first, then divides into the destination, while side views show hours, days, and total seconds together. Everything runs locally at $0 cost with no signup required, making it free and instantly offline for billing and planning.

Results format and conversion factors: The headline result carries a compact label like min, h, d, wk, mo, or yr, with six decimal precision and exponential fallback for huge values. Core factors are 60 seconds per minute, 3,600 per hour, 86,400 per day, 604,800 per week, 2,629,746 per average month, and 31,556,952 per average year. A Chicago manager planning a $12,000 sprint on 09/15/2026 sees 14 days land exactly on 2 weeks.

Why months and years use averages: Real calendar months run 28 to 31 days and years run 365 or 366 days, so duration math uses the Gregorian averages of 30.44 days per month and 365.25 days per year for consistency. An Austin freelancer billing $85 per hour across a $2,400 monthly retainer on 04/01/2026 can quote 160 hours cleanly without calendar edge cases distorting the invoice.

Privacy and local browser execution: This converter works entirely in your browser with zero server calls, so schedules, payroll figures, and contract terms never leave your machine. Nothing is transmitted, logged, or stored anywhere. Whether you are Denver HR staff running $60,000 payroll cycles or a Seattle student converting a $900 lease, the numbers stay local and private.

United States work planning workflow: Translate 90 minute deep work blocks into 1.5 billable hours, two week sprints into 80 hour pay periods, and 40 hour weeks into 2,400 payroll minutes. Overtime math starts after 40 hours, and two week pay periods anchor at 80 hours. A New York producer budgeting an $8,500 shoot day on 09/20/2026 converted 12 hour calls into 720 minutes for meal penalty tables.

Common duration mistakes to avoid: Do not use duration averages for exact calendar deadlines, since a 30.44 day month never matches February. Do not confuse decimal hours with hours and minutes, because 1.5 hours is 90 minutes, not 1 hour 50 minutes. A Miami streamer timing a $400 premiere learned that 2.5 hours means 150 minutes sharp, not 2 hours 50 minutes on the schedule card.