Free calculators for work, pay & everyday math

Why free, simple tools beat spreadsheets

Most of the math you do in daily life isn't complicated — but it's easy to get wrong. How many hours did you actually work this week once you subtract two 30-minute lunch breaks? What's 18% of a $64.40 bill split three ways? How many days until your vacation? A calculator built for the exact question gets you the answer in seconds, with the math shown, so you can double-check it. That's the whole idea behind TimeTally Tools: one focused calculator per question, no clutter, no learning curve.

Hourly workers and managers are our biggest audience. If you track shifts, check your paycheck, or fill out time cards, small errors add up over a year. Our work-hours, time-card, overtime, and salary-to-hourly calculators let you verify your numbers independently — useful whether you're confirming a paycheck is right or quoting an hourly rate as a freelancer. Everything shows its work so you can see exactly how a total was reached.

Your privacy comes first

Every tool on this site runs entirely in your web browser. When you type numbers into a calculator, that data stays on your device — it's never sent to our servers, because we don't have accounts, logins, or a database to send it to. There is no sign-up, no download, and no email capture standing between you and an answer. The site is kept free by advertising (see our Privacy Policy and Disclaimer for details on ad cookies), which means you pay nothing and keep your data on your own machine. If you ever have a question or spot an error in our math, reach out on the Contact page — we read every message.

Why the tools are free

Running a website costs money — hosting, domain registration, and the time it takes to build and maintain each calculator. Instead of charging for access or locking features behind accounts, we keep every tool free and cover the bills with advertising. That trade-off is deliberate: a tip calculator shouldn't need your email address, and a work-hours total shouldn't live on someone else's server. Because the calculations happen on your device, our costs stay low and your information stays yours. If ads ever interfere with using a tool, tell us — the calculators always come first.

Built for real-life moments

These tools are designed for the moments when you need a number you can trust: reviewing a paycheck stub at the kitchen table, splitting a dinner bill at a restaurant, counting down the days to a wedding, or estimating a GPA before meeting an advisor. Every page shows its work, uses plain language instead of jargon, and works just as well on a phone as on a desktop. We test each calculator, keep the formulas transparent, and fix verified errors quickly. If there's a calculator you need that isn't here yet, request it — reader suggestions are how this collection grows.

Getting the most out of these calculators

For the best results, double-check the numbers you enter — a calculator can only be as accurate as its inputs. When comparing pay scenarios, use the same assumptions (hours per week, weeks per year) so the totals are truly comparable. And when a result matters for a paycheck dispute, a tax filing, or a legal deadline, treat our tools as a second opinion and confirm with your employer, payroll provider, or the official source. Used that way, a quick free calculator is one of the most practical tools on your phone.

New tools are added over time based on what readers ask for. Bookmark the tools you use most, and share them with anyone who could use a faster answer.