KwiqCalc
Date Math & Countdowns

Date & Time Calculators

Add or subtract days, track future deadlines, and count down to major events.

Gregorian calendar rulesWorking vs weekend daysLeap year safe
Popular Deadlines
30 Days From Today≈ 1 Month / 4w 2d
60 Days From Today≈ 2 Months / 8w 4d
90 Days From Today≈ 1 Quarter / 12w 6d

Categories

Select a calendar or time conversion category.

9 Tools

Date Arithmetic

Add or subtract days, weeks, and months from today.

6 Tools

Event Countdowns

Days, sleeps, and business days to holidays & seasons.

3 Tools

Time Conversion

Convert minutes into decimal hours and clock format.

All Time & Date Tools

Direct access to every converter and countdown.

18 Calculators

Time Conversion Reference Table

Standard time units converted to seconds and durations.

Time UnitSecondsEquivalent Duration
1 Minute60 seconds1/60 hour
1 Hour3,600 seconds60 minutes
1 Day86,400 seconds24 hours
1 Week604,800 seconds7 days / 168 hours
30 Days2,592,000 seconds720 hours / 4.28 weeks
1 Year (Standard)31,536,000 seconds365 days / 52 weeks 1 day
1 Year (Leap)31,622,400 seconds366 days / 52 weeks 2 days