About PayrollCalcs

A small, independent set of wage-and-hour calculators built around one idea: accuracy is the product.

What this site is

PayrollCalcs publishes free calculators for the parts of US wage-and-hour compliance that payroll systems and spreadsheets most often get wrong: the weighted-average (“blended”) regular rate for employees with more than one pay rate, shift differentials in the overtime calculation, and the four-part eligibility test for leave under the Family and Medical Leave Act. The audience is small-business owners doing their own payroll, payroll administrators checking a system’s output, and HR generalists who need to answer “is this person eligible?” with a citation.

Methodology

• Primary sources only. Every rule the calculators apply is traced to the current text of Title 29 of the Code of Federal Regulations (Part 778 for overtime, Part 825 for the FMLA) on the eCFR, and to the Department of Labor Wage and Hour Division’s own fact sheets (#23, #28, #56C). We quote the regulation on each page and link to the section.
• Federal rules only. We do not attempt to encode state or local law. State law frequently requires more than the FLSA or FMLA, and a stale state table is worse than none. Each page says so prominently.
• Show every step. A number without its derivation cannot be checked. Each result lists the intermediate figures and the formula used, and names the regulation behind each step.
• Show the wrong answer too. Most users arrive because a payroll report looks off. Seeing the common incorrect method next to the correct one makes the discrepancy recognizable.
• Tested. The calculation code is a single shared library covered by automated tests for the worked examples on each page and the edge cases (no overtime, bonus inclusion, each FMLA test failing independently). The same code runs in your browser and in the tests.
• Full precision. No rounding is applied until a figure is displayed. Payroll systems that round the regular rate to the cent before multiplying may differ by a few cents.

Last review

All pages were last reviewed against the eCFR text on October 26, 2026. Regulations change; the federal overtime threshold of 40 hours and the FMLA tests (12 months, 1,250 hours, 50 within 75 miles) have been stable for decades, but we re-check quotations and links periodically. If a DOL rule change affects a calculator, the page’s “last updated” date will move.

Privacy

The calculators run entirely in your browser. Nothing you type is transmitted or stored by us. There are no accounts, and we set no cookies. See the privacy policy for the third-party advertising and affiliate details.

Funding and independence

The site is supported by affiliate links to payroll and HR software, clearly labeled “Sponsored / affiliate links” on each calculator page, and may carry display advertising in future. We may earn a commission when you sign up through one of those links. Advertisers and affiliates have no input into the calculations or the explanatory content, and we do not accept payment to alter either.

Found an error?

Please tell us. Email [email protected] with the page, the inputs you used, and what you expected. Accuracy reports are the most valuable feedback we get and are fixed first.

Not legal advice

These tools are educational. They are not a substitute for advice from an employment attorney, a certified payroll professional, or your state labor department, and using them creates no professional relationship. Read the terms and disclaimer.