Time Converter

Convert between all common time units instantly. Select your units from the dropdowns below and enter a value to see the conversion in real-time.

SI unit: second (s)

Conversion Formula

About Time Units

Common Time Conversions

• 1 min = 60 s  |  1 h = 3,600 s = 60 min  |  1 day = 86,400 s = 24 h = 1,440 min
• 1 week = 7 days = 604,800 s  |  1 fortnight = 14 days = 1,209,600 s
• 1 Gregorian year = 365.2425 days = 8,765.82 h = 31,556,952 s
• 1 Julian year (IAU) = 365.25 days = 31,557,600 s (used for light-years and parsecs)
• 1 tropical year = 365.24219 days = 31,556,925.216 s (governs the seasons)
• 1 synodic month = 29.530588853 days ≈ 2,551,442.877 s (new moon to new moon)
• 1 sidereal day = 23 h 56 min 4.0905 s = 86,164.0905 s (Earth rotation relative to stars)
• 1 ms = 10⁻³ s  |  1 µs = 10⁻⁶ s  |  1 ns = 10⁻⁹ s  |  1 ps = 10⁻¹² s  |  1 fs = 10⁻¹⁵ s
• 1 decade = 10 yr  |  1 century = 100 yr  |  1 millennium = 1,000 yr = 1 ka
• Age of the universe ≈ 13.787 Ga ≈ 4.352 × 10¹⁷ s

Direct Converters