Time conversion, duration, and timer calculators. Browse our free time tools below — all calculators are instant, accurate, and require no sign-up.
Audiobook Speed Calculator — Calculate how playback speed affects audiobook listening time. Find your optimal speed and see how much time you save at 1.25x, 1.5x, 2x, and custom speeds.
Audiobook Listening Calculator — Calculate how many audiobooks you can listen to per year based on your daily schedule. Plan reading goals and optimize your listening time.
Binge-Watching Calculator — Calculate exactly how long it takes to binge-watch a TV series. Plan your viewing schedule for any show with custom episode counts and durations.
Reading Challenge Calculator — Plan your annual reading challenge. Calculate how many pages and hours per day you need to hit your Goodreads or personal reading goal for the year.
Date Difference Calculator — Calculate the exact time between two dates in years, months, days, weeks, and business days. Find durations for project planning, contracts, countdowns, and more.
Days to Hours Converter — Convert days to hours easily with our free online tool. Enter any number of days and get the precise equivalent in hours, minutes, and seconds.
Hours to Minutes Converter — Convert hours to minutes instantly with our free online calculator. Enter any number of hours and get the exact equivalent in minutes.
Hours to Seconds Converter — Convert hours to seconds instantly with our free calculator. Enter hours to get the exact number of seconds, perfect for programming and scheduling.
Military Time Converter — Convert between 24-hour military time and 12-hour AM/PM format instantly. Enter any time in either format and get the accurate conversion.
Minutes to Hours Converter — Convert minutes to hours quickly with our free online calculator. Enter any number of minutes to get the precise equivalent in hours and decimals.
Minutes to Seconds Converter — Convert minutes to seconds instantly with our free online tool. Enter any number of minutes and get the exact equivalent in seconds and milliseconds.
Olga Tokarczuk Reading Time Calculator — Calculate how long it takes to read all of Olga Tokarczuk's books. Plan your journey through the Nobel laureate's novels with personalized time estimates.
Podcast Listening Calculator — Calculate your total podcast listening time per week, month, and year. Track how many hours you spend on podcasts and find your optimal listening schedule.
Quarantine Reading Calculator — Calculate how many books you can read during quarantine, isolation, or extended time off. Build a reading plan based on your available days and reading speed.
Pomodoro Timer Calculator — Plan your Pomodoro work sessions by calculating total work time, break time, and session end time. Enter pomodoros, durations, and breaks for a full plan.
Sleep Calculator — Calculate ideal bedtime or wake-up time based on sleep cycles. Each cycle is ~90 minutes; waking between cycles leaves you feeling refreshed.
Stopwatch Lap Time Calculator — Enter cumulative split times and calculate individual lap times, averages, fastest and slowest laps. Perfect for running, swimming, and cycling.
Time Card Calculator — Calculate weekly work hours from daily clock-in/clock-out times with overtime. Enter up to 7 days of shifts to get total regular and overtime hours.
Time to Decimal Converter — Convert hours, minutes, and seconds to decimal hours or decimal minutes. Perfect for timesheets, payroll, and billing needing decimal time format.
Unit Converter — Convert between units of length, weight, volume, and temperature. Supports metric, imperial, and US customary units with instant bidirectional conversion.
Time Duration Calculator — Add or subtract two time durations in hours, minutes, and seconds. Combine multiple time spans or find the difference between two time values.
Weeks to Days Converter — Convert weeks to days instantly with our free online converter. Enter any number of weeks and get the exact equivalent in days, hours, and minutes.
Work Hours Calculator — Calculate total work hours between clock-in and clock-out times minus breaks. Enter start time, end time, and break duration to get net hours.