CalcTap Blog
Original, practical guides written to help you understand calculations — not just copy an answer.
Time & Scheduling — Work hours, overtime, timezones, and date calculation guides.
Scheduling content covers work hours totals, timezone offsets, overtime rules at a conceptual level, and date differences across calendars — the kinds of problems that quietly break when DST, leap years, or shift patterns enter the picture. Use the tutorials for context and the calculators for repeatable checks.
Browse the list below or switch categories with the filter. Every post includes practical takeaways you can verify with our free calculators on the rest of CalcTap.
Time & Scheduling posts
4 postsHow to Count the Days Between Two Dates — and Why It's Harder Than It Looks
Counting days between dates sounds trivial until leap years, month-length differences, and the business-day distinction turn a quick count into a calculation requiring real care.
How to Calculate Your Exact Age (Years, Months, and Days)
From legal milestones to paediatric dosing, your exact age in years, months, and days matters far more than the rough number you carry in your head. Here's how age is actually calculated.
Overtime Pay Explained: Rules, Multipliers, and How to Calculate What You're Owed
Daily vs. weekly thresholds, 1.5× vs. 2× rates, blended-rate employees, and exempt vs. non-exempt status — this guide covers every scenario with clear, worked examples.
How to Calculate Work Hours Accurately (Without Getting It Wrong)
From overnight shifts to unpaid breaks and decimal conversions, this guide walks through every real-world scenario so your timesheet always adds up correctly.
Reading guides alongside CalcTap calculators
Many posts link directly to calculators that reuse the same variables mentioned in the text (for example, principal and APR for loans, hourly rate for salary estimates, birth date for age, origin and destination zones for conversions). Starting from the guide helps you know which fields matter and why the output behaves the way it does.
If you find an explanation unclear or believe a formula no longer reflects how a lender, payroll system, or public holiday calendar works where you live, contact us via the CalcTap contact page — we revise content when credible feedback points to an error or a better default assumption.