About Time Clock Calculator

Time Clock Calculator was built for the people who actually deal with timesheets: hourly workers checking that their paycheck adds up, freelancers invoicing by the hour, small-business owners running weekly payroll, and HR staff double-checking edge cases like overnight shifts or California daily overtime. If you've ever squinted at a paystub and wondered whether the math was right, this tool is for you.

We deliberately don't ask for a signup, a credit card, or even an email. There's no "free trial" that flips into a subscription. The calculator is free because it's cheap to run — it's static HTML, CSS, and JavaScript that does its work in your browser. Ads on the guides pages cover hosting costs.

Three overtime modes are supported. Pick the one that matches your jurisdiction or contract. For a deeper dive on how each one is calculated, see our overtime rules guide.

• No overtime — every hour at your base rate. Use for exempt salaried employees or flat-rate contractors.
• Standard (40h / week) — federal FLSA. Hours over 40 in a week paid at 1.5×. Applies in most US states for non-exempt hourly workers.
• California — daily hours over 8 paid at 1.5×, daily hours over 12 paid at 2×, plus weekly hours over 40 bumped to 1.5×. The strictest daily-OT regime in the US.

Many employers round punches to the nearest 5, 6, 10, or 15 minutes. Choose your increment and a mode (nearest, up, or down) in Settings. Rounding applies to each calculated duration. Under FLSA, the "nearest" mode implements the 7-minute rule: punches at minute 0–7 round down to the previous quarter hour; punches at minute 8–14 round up.

When the end time is earlier than the start time, the shift is treated as crossing midnight (e.g., 22:00 → 06:00 = 8 hours). The calculator adds 24 hours to the end time before subtracting, which is the standard way payroll systems handle graveyard shifts.

Gross pay = (regular hours × rate) + (overtime hours × rate × 1.5) + (double-time hours × rate × 2). Currency is display-only — it doesn't change the math, just the symbol shown. The calculator does not deduct taxes, FICA, or other withholdings; you'll need your payroll provider for net pay.

We use your browser's local storage to remember settings and saved weeks. Nothing is uploaded to a server. Clearing your browser data will erase your history. We don't set first-party tracking cookies, and we don't sell or share any data — because we don't have any to share.

Google AdSense ads on the guides pages do set cookies for ad personalization and measurement. See our privacy policy for details on how those work and how to opt out.

Time Clock Calculator is built and maintained by an independent developer who got tired of either paying for clunky time-tracking SaaS or pasting times into a calculator app and doing the decimal conversion by hand. The codebase is a single-page React app deployed on the edge — no backend, no database, no analytics beyond aggregate page views.

We update the guides whenever overtime law changes meaningfully (the last big federal change was the 2024 salary-threshold update). If you spot an error or a rule we got wrong, please let us know.

Questions, bug reports, or guide suggestions: hello@timeclockcalculator.online. We read everything; we reply when we can.