About TimeAdditionCalculator.com

Our Mission

TimeAdditionCalculator.com provides free, accurate time calculation tools designed for professionals, freelancers, and small businesses. We believe that reliable time math shouldn't require expensive software or complex spreadsheets — it should be instantly accessible to everyone, on any device.

Beyond calculators, we're committed to education. Our guides and reference materials help people understand the formulas behind the results, from base-60 arithmetic to federal labor regulations. When you use our tools, you're not just getting an answer — you're building the knowledge to verify it yourself.

Our Accuracy Standards

Accuracy isn't a feature — it's our foundation. Every calculator, formula, and reference on this site goes through a rigorous verification process before publication and is regularly audited for continued correctness.

• Every formula is verified against ISO 8601 time representation standards
• All FLSA references are verified against current CFR text at ecfr.gov
• Historical claims are verified against academic sources and primary documentation
• Regular content audits ensure information stays current as laws and pricing change
• Every page displays a "Last updated" date for full transparency

Mathematical examples used throughout the site are programmatically tested — not estimated or assumed correct. When we cite a regulation, we link to the authoritative source so you can verify it for yourself.

What We Offer

Our suite of specialized calculators and resources covers the full spectrum of time calculation needs — from simple time addition to complex overtime and payroll scenarios.

Calculators

• Time Addition Calculator — Add multiple time durations in hours, minutes, and seconds
• Work Hours Calculator — Calculate daily and weekly work hours with breaks
• Timesheet Calculator — Full-week timesheet with overtime and gross pay
• Time Subtraction Calculator — Find the difference between two time values
• Elapsed Time Calculator — Calculate time elapsed between two clock times
• Overtime Calculator — Compute overtime pay under federal and state rules

Guides & Resources

• How to Calculate Work Hours — Step-by-step guide with real-world examples
• Time Tracking Software Comparison — Detailed feature and pricing comparison
• What Is Base-60? — The math behind time calculation
• Time Addition Formulas — Reference for manual time calculations

Editorial Policy

Our content is created with a single priority: factual accuracy. Every page undergoes a multi-step process that includes research against primary sources, mathematical verification through programmatic testing, and cross-referencing with authoritative databases like the Electronic Code of Federal Regulations (eCFR) and the Department of Labor.

We prioritize accuracy over SEO performance. While we optimize our pages for search visibility, we never sacrifice correctness for ranking tactics. If a claim can't be verified against a primary source, it doesn't appear on the site.

Corrections

When errors are identified — whether by our internal audits or by reader feedback — corrections are made promptly. Updated content is re-verified against primary sources, and the "Last updated" date is adjusted to reflect the most recent revision.

Affiliate Disclosure

Some pages on this site contain affiliate links, primarily in our software comparison guide. These links are clearly labeled. Affiliate relationships have no influence on our editorial assessments, feature evaluations, or pricing information. Our recommendations are based solely on product quality and user value.

Contact

Have a question, found an error, or want to suggest a feature? We'd like to hear from you.

Visit our contact page or reach us directly at admin@timeadditioncalculator.com.

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