I’m Iqra Tariq, an SEO specialist based in Multan, Pakistan, and the founder of IA Digitals, where I help businesses grow through search. I built CalculatorSpan because I got tired of the same experience. I needed a quick time calculation, and the page I landed on made me work for it. The tool was buried, the layout jumped around, and the answer came with no explanation of how it was worked out.
So I built a version I’d actually want to use.
What you’ll find here
CalculatorSpan is a collection of free calculators and converters for time, dates, and work hours. They fall into four groups:
- Time calculators add and subtract hours, minutes, and seconds, or tell you what time it was or will be.
- Date calculators count days, weeks, and working days between two dates, or work out your exact age.
- Work and pay tools total timesheets, work out overtime, and turn salary into an hourly rate.
- Converters switch between decimal hours, 24-hour time, time zones, and Unix timestamps.
Every tool needs no account and no sign-up. The calculator sits at the top of the page, so you can use it straight away.
How the tools are built
Each page does more than hand you a number. Under the calculator, you’ll find worked examples, the logic behind the math, and answers to the questions people ask most. If a result looks wrong to you, you can check it yourself.
I keep one rule for every tool. It has to give the right answer, load fast, and work on a phone as well as a laptop.
Who runs the site
I’ve worked in SEO for over four years, covering technical, on-page, and local SEO. I build and grow my own websites, and CalculatorSpan is one of them. That means I test what I publish on my own projects before I recommend it to anyone else. If you’re curious about my SEO work, you can see it at IA Digitals.
How the site is funded
CalculatorSpan is free to use. To cover hosting and the time it takes to build and maintain the tools, the site shows ads through Google AdSense. I place them away from the calculators and result boxes so they don’t get in your way. You can read how ads and cookies work in our Privacy Policy.
A note on accuracy
I test every calculator before it goes live, and I fix mistakes as soon as someone reports them. Still, these tools give general results for information only. For payroll, legal, tax, or financial decisions, check the figures independently or ask a qualified professional.
Available in three languages
You can use CalculatorSpan in English, Portuguese, and Turkish. Switch language from the menu at the top of any page. There is also a free Chrome extension, CalculatorSpan Date & Time Tools, for quick calculations from your browser toolbar.
Get in touch
Found a wrong result? Want a calculator we don’t have yet? Email me at calculatorspan@gmail.com. I read every message and usually reply within 24 to 48 hours. You can also use the Contact page.