Free Calculator Widgets for Your Site

Run an HR blog, payroll site, staffing agency or small-business resource page? Embed any HourMath calculator for free with one line of code. It's mobile-friendly, runs entirely in the visitor's browser, and stays up to date automatically — including the state overtime rules most calculators get wrong.

One-line iframe · No sign-up or API key · Mobile & dark-mode ready · Always current

Paycheck Calculator

Take-home pay after federal, state and FICA taxes.

<iframe src="https://hourmath.com/embed/paycheck/" width="100%" height="840" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Paycheck Calculator by HourMath" loading="lazy"></iframe>

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Timesheet Calculator

Weekly time card with breaks and overtime.

<iframe src="https://hourmath.com/embed/timesheet/" width="100%" height="780" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Timesheet Calculator by HourMath" loading="lazy"></iframe>

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Billable Hours

Revenue by client and utilization rate.

<iframe src="https://hourmath.com/embed/billable-hours/" width="100%" height="720" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Billable Hours by HourMath" loading="lazy"></iframe>

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Overtime Calculator

Federal + state daily overtime, double-time and pay.

<iframe src="https://hourmath.com/embed/overtime/" width="100%" height="720" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Overtime Calculator by HourMath" loading="lazy"></iframe>

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California Overtime

CA daily OT, double-time and the 7th-day rule.

<iframe src="https://hourmath.com/embed/california-overtime/" width="100%" height="780" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="California Overtime by HourMath" loading="lazy"></iframe>

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Nevada Overtime

NV daily OT for lower-wage employees.

<iframe src="https://hourmath.com/embed/nevada-overtime/" width="100%" height="780" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Nevada Overtime by HourMath" loading="lazy"></iframe>

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Colorado Overtime

CO 12-hour daily overtime rule.

<iframe src="https://hourmath.com/embed/colorado-overtime/" width="100%" height="780" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Colorado Overtime by HourMath" loading="lazy"></iframe>

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Alaska Overtime

AK 8-hour daily overtime rule.

<iframe src="https://hourmath.com/embed/alaska-overtime/" width="100%" height="780" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Alaska Overtime by HourMath" loading="lazy"></iframe>

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Shift Differential

Night, weekend and holiday premium pay.

<iframe src="https://hourmath.com/embed/shift-differential/" width="100%" height="720" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Shift Differential by HourMath" loading="lazy"></iframe>

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Hours Calculator

Hours between two times, overnight-aware.

<iframe src="https://hourmath.com/embed/hours/" width="100%" height="680" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Hours Calculator by HourMath" loading="lazy"></iframe>

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12-Hour Shift

Total 12-hour shifts with overtime.

<iframe src="https://hourmath.com/embed/12-hour-shift/" width="100%" height="720" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="12-Hour Shift by HourMath" loading="lazy"></iframe>

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Biweekly Timesheet

Two-week timesheet with per-week overtime.

<iframe src="https://hourmath.com/embed/biweekly-timesheet/" width="100%" height="760" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Biweekly Timesheet by HourMath" loading="lazy"></iframe>

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Semimonthly Pay

Twice-a-month paycheck and salary split.

<iframe src="https://hourmath.com/embed/semimonthly/" width="100%" height="700" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Semimonthly Pay by HourMath" loading="lazy"></iframe>

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Salary ↔ Hourly

Convert pay both ways with real hours.

<iframe src="https://hourmath.com/embed/salary-to-hourly/" width="100%" height="700" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Salary ↔ Hourly by HourMath" loading="lazy"></iframe>

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Decimal Hours

Convert clock time to decimal hours.

<iframe src="https://hourmath.com/embed/decimal-hours/" width="100%" height="680" style="border:1px solid #e2e8f0;border-radius:10px;max-width:600px;" title="Decimal Hours by HourMath" loading="lazy"></iframe>

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How to embed a calculator

Pick a calculator above and click Copy code.
Paste the <iframe> into your page's HTML — a blog post, a CMS "custom HTML" block, a WordPress Custom HTML block, Webflow embed, or Notion /embed.
That's it. The calculator loads instantly and adjusts to your column width (up to 600px).

Why embed instead of linking out

Keep visitors on your page instead of sending them to a competitor. Give them a genuinely useful tool — accurate overtime including real state daily-overtime rules — without building or maintaining anything. Each widget carries a small "Powered by HourMath" link so readers can open the full tool if they want.

Terms

Embedding is free for any site. Please keep the widget unmodified, including the attribution link. The calculators are general information, not legal or payroll advice. Questions or a custom size? Contact us.