Time Converter

Convert between seconds, minutes, hours, days, weeks, months, and years.

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Background

Time uses base-60 (sec→min), base-24 (hr→day), and irregular months. These irregularities make manual conversion error-prone, especially for payroll and project planning.

Calendar Irregularity

Months: 28–31 days. Years: 365 (366 leap). Finance uses 30/360, actual/365, or actual/actual conventions.

Decimal Time in Payroll

7 hr 30 min = 7.5 decimal hours. Common source of payroll errors if done manually.

How to Use This Calculator

Select 'Time'
Choose the category from the dropdown.
Select your source unit
Pick the unit you're converting from.
Enter the value
Type the number. Results update instantly.
Select your target unit
Choose the unit you need.

Applications

Payroll and Time Tracking

8 hr 15 min = 8.25 decimal hours. Ensures accurate wage calculations.

Project Planning

90 days ≈ 13 weeks or 3 months. Working days depend on weekends/holidays.

Scientific Calculations

1 ms repeated 86.4M times = 1 day. Rate calculations need precise time conversions.

Frequently Asked Questions

How do you convert minutes to decimal hours?

Divide by 60. 45 min = 0.75 hr. So 2 hr 45 min = 2.75 decimal hours.

How many seconds in a day?

86,400 seconds (24 × 60 × 60).

How many working days in a year?

~260 (52 weeks × 5 days) minus ~10–12 public holidays = 248–250 working days in Australia.