Free Time Tracking Tools and Calculators
Calculators and timers for hours, pay, rates, billing, and focus. No signup, and nothing you type leaves your browser.
Hours and pay
Add up hours worked and convert between rates and salaries.
Time Card Calculator
Add clock-in, clock-out, and break times to get daily and weekly hours, overtime, and pay.
Open toolHourly to Salary Calculator
Convert an hourly rate to an annual salary and back, with overtime and unpaid time off.
Open toolOvertime Pay Calculator
Add regular, overtime, and double-time hours at your rate to get overtime pay and total pay.
Open toolWorking Days Calculator
Count the business days between two dates, excluding weekends and public holidays.
Open toolBilling and revenue
Set rates, estimate lost revenue, and turn hours into invoices.
Billable Leakage Calculator
Estimate the revenue lost to forgotten billable work, and how much better tracking could recover.
Open toolFreelance Rate Calculator
Work out the hourly rate you need from your income goal, costs, time off, and billable share.
Open toolFreelance Take-Home Calculator
Estimate the rate you need for a target net income, or the take-home from a rate, after a tax set-aside.
Open toolContractor vs Employee Calculator
Estimate take-home pay as an employee versus a self-employed contractor on the same gross, by country.
Open toolMeeting Cost Calculator
See what a meeting costs from the people, their rate, and the length, with a live cost timer.
Open toolProject Profitability Calculator
Turn revenue, hours, cost rate, and expenses into project cost, profit, and margin.
Open toolTime Tracking Health Check
Grade your team on utilization, lost time, overtime, and timesheet discipline, and see what to fix first.
Open toolInvoice Generator
Create a simple invoice online, then print it or save it as a PDF. No signup or email address.
Open toolLabor Cost Calculator
Turn team size, hours, rate, and overtime into the total labor cost of a shift or project.
Open toolTime converters
Convert between time formats and durations for timesheets and pay.
Military Time Converter
Turn 24-hour military time into 12-hour AM/PM time and back, with a full reference chart.
Open toolHours to Decimal Converter
Turn hours and minutes into decimal hours for payroll and billing, and back again.
Open toolTime Duration Calculator
Find the hours and minutes between a start and end time, minus an unpaid break.
Open toolTime Zone Converter
Pick a time in one zone and see it across your team, with working hours and day shifts.
Open toolDates and weeks
Find the week number and work out dates across the calendar.
Week Number Today
See what week of the year it is now and look up the week number for any date.
Open toolISO Week Number Today
See the current ISO 8601 week and look up the ISO week for any date.
Open toolDays Between Dates
Count the days, weeks, and months between two dates, with a full breakdown.
Open toolBusiness Day Calculator
Add or subtract working days from a date, skipping weekends and public holidays.
Open toolLeave and time off
Work out paid time off accrual and balances.
Focus timers
Simple timers to help you concentrate and take breaks.
Pomodoro Timer
Run 25-minute focus sessions with short breaks, and count completed sessions in your browser.
Open toolSand Timer
Start a visual sand timer from 1 minute to 1 hour for focus, study, meetings, and breaks.
Open toolOnline Stopwatch
Start, stop, and reset a stopwatch in your browser, with laps and hundredths of a second.
Open toolQuestions about the free tools
Are the tools free?
Yes. Every tool is free, needs no account or email address, and has no usage limit.
Do the tools store what I enter?
The calculators run entirely in your browser. Nothing you type is saved or sent to a server.
How is this different from the app?
The tools are quick manual helpers. Sandtime.io records time as you work, so hours, overtime, and billable totals are ready without retyping them.
Which public holidays do the date calculators use?
The working days and business day calculators subtract the 2026 public holidays for the country you pick. Choose None to count weekdays only, without any holidays.
Can I use the tools on a phone?
Yes. Every tool runs in a mobile browser, with nothing to install and no account to create.