A free online shift calculator paired with plain-language guides on work hours, overtime, shift differentials and pay — built so any hourly worker can check their numbers in seconds, with no sign-up and no data leaving their browser.
ShiftCalculator.com is a free web tool and resource site for anyone who needs to work out how many hours they worked and what they earned. Type your start time, end time and break, and the calculator returns total hours, overtime and pay instantly. There is no account, no subscription and no data stored on a server — all the math runs in your browser.
Alongside the calculators, the site publishes in-depth guides on the questions that come up around payroll — how overtime works in practice, what shift differential really means, how long an 8, 10 or 12 hour shift actually pays, and the difference between biweekly and semi-monthly pay cycles. The aim is to answer the question accurately on the page itself, not just point you at a tool.
Most online shift and payroll calculators are either oversimplified (just hours, no overtime or differential), require sign-up, lock features behind a paywall, or bury the answer under ads. ShiftCalculator.com was built to be the opposite of that:
Total hours, overtime, gross and net pay for a single shift with start time, end time, break and hourly rate.
Build a week or month of shifts in the advanced calculator and see totals, averages and projected monthly and annual pay.
Pick Evening (1.25×), Night (1.5×), Weekend (1.5×) or Holiday (2×) and see the premium applied to gross and net pay.
Plain-English explanations of overtime rules, payroll hour conversion, shift differentials and pay-cycle differences.
Download your tracked shifts as a spreadsheet for your own records or to send to a manager or payroll team.
Works on phone, tablet and desktop. Nothing to install, no account to create.
The site is used by hourly employees checking their paycheck math, shift workers in healthcare, retail, hospitality and manufacturing, freelancers and contractors converting tracked time into billable hours, and small employers running quick payroll sense-checks. If you are paid by the hour or pay people by the hour, ShiftCalculator.com is built for you.
ShiftCalculator.com is a tool for calculation and learning, not payroll software or professional advice. Calculations are based on common rules (8-hour daily overtime, standard differential percentages) but real-world payroll depends on your jurisdiction, contract and employer policy. Always confirm important numbers with your employer or a qualified professional before relying on them.
The calculators run entirely in your browser using JavaScript. No shift times, hourly rates, tax rates or labels are sent to or stored on any server. The site uses standard web analytics to understand which pages are useful and which break, and may serve advertising via Google AdSense — both governed by the full Privacy Policy.
Email is the best way to reach us — replies usually within a day.
Contact ShiftCalculator.com