Instant, no-signup tools for the everyday time math freelancers, employees, and managers do by hand — converting military time, adding up hours, building a weekly timesheet, and running payroll.
What time is 1500 military time?
Convert military (24-hour) time to AM/PM and back instantly, and hear how each hour is said aloud.
Open toolMilitary time chart
The full 0000–2359 conversion chart with AM/PM equivalents and minutes as decimal hours — free to print or download as PDF.
Open toolHours calculator
Find the hours between two times across as many blocks as you need, with break deductions and decimal hours.
Open toolTimesheet calculator
Add up a full week of clock-in/clock-out times with lunch breaks and overtime — the free timecard & work hours calculator.
Open toolPayroll hours calculator
Turn a week of hours into gross pay with overtime and clean decimal hours ready for QuickBooks or Gusto.
Open toolTrue cost of an employee
See the true cost of an employee — wages plus payroll taxes, workers’ comp, benefits, and overhead — as a fully-loaded hourly rate.
Open toolOvertime rules by state
Look up daily and weekly overtime thresholds and multipliers for any US state or Canadian province, with official-source links.
Open toolMinimum wage by state
Find the current minimum wage for every US state and Canadian province, with notes and a link to the official government source.
Open toolFree timesheet template
Build a printable weekly, bi-weekly, or monthly timesheet template and download it as PDF or Excel — free, no email.
Open toolFree invoice generator
Create a professional hourly invoice with line items, tax, and totals, then download it as a PDF or Excel file.
Open toolHere’s the automated version. Every calculator here does one slice of what BizyClock automates all day — clock-ins, breaks, overtime, and payroll-ready hours for your whole team, with nothing typed into a spreadsheet.
Every one of these calculators does a small piece of the work BizyClock automates all day: converting between 24-hour and 12-hour time, adding up the hours between a clock-in and a clock-out, deducting unpaid lunch breaks, splitting regular hours from overtime, and turning it all into the clean decimal hours a payroll system expects.
Doing that by hand on a spreadsheet is where mistakes creep in — a mis-typed time, a break forgotten, an overnight shift that wraps past midnight. These tools get the arithmetic right every time. And when you are ready to stop re-entering times by hand, BizyClock records them automatically for your whole team.
Curious what that would cost? Estimate your monthly price with the pricing calculator.
These calculators are completely free with no signup, no email, and no limits. BizyClock itself is a paid time-tracking app with an affordable Solo plan and a 30-day money-back guarantee on every plan — the calculators here give you a taste of the automatic time math the full app does for your whole team.
The best free time clock app is the one your team will actually use every day. BizyClock focuses on being fast to clock in (web, mobile, and PIN kiosk), accurate on breaks and overtime, and simple for owners to run payroll from — without the surveillance-style monitoring some competitors add.
Yes. The Solo plan is built for freelancers and solopreneurs: track billable hours per client, calculate durations across days, export clean decimal hours for invoicing, and keep a tidy record of every session — the same math these free tools do, automated.
For managing work time — hours, shifts, projects, and payroll — a dedicated time tracker like BizyClock beats a generic to-do app because it records real clock-in/out data you can bill and pay from. Pair it with a calendar and a task app for personal planning.
The 7-8-9 rule is a simple daily balance: roughly 7 hours of sleep, 8 hours of work, and 9 hours for everything else (family, exercise, meals, downtime). Tracking your actual worked hours with a timesheet calculator is the easiest way to see whether your real day matches that target.
Elon Musk is known for time-blocking his day into tightly scheduled 5-minute slots. The underlying idea — assigning every block of time a purpose and measuring it — is exactly what time tracking does at the work level, turning estimates into recorded hours you can review.
BizyClock records clock-ins, breaks, and overtime automatically, then turns them into timesheets and payroll-ready hours for your whole team — no spreadsheets required.
No free tier — but our tools above are always free to use