Welcome to the First Column IT Tech Blog

HomeBlog
How to Get Your Spreadsheets to Accurately Add Time

How to Get Your Spreadsheets to Accurately Add Time

September 9, 2024

Handling time calculations in a spreadsheet can often feel frustrating—especially when you’re just trying to add them up. Luckily, both Microsoft Excel and Google Sheets have built-in functions specifically designed for this purpose, making the process more manageable.

Here’s a quick guide to help you get started, no matter which spreadsheet program you use.

How to Use the Dynamic Time Function for Time Calculations

While relying on a specialized formula to add times may seem complex at first, it actually gives you more precise control over your calculations, ensuring your time sums are both accurate and practical.

To use the Dynamic Time Function, you need to start with an initial time value. Let’s say we use 12:00:00 AM, ensuring the data is formatted as "Time." In Excel, this can be adjusted from the Home menu in the dropdown box above Number, while Google Sheets has the adjustment in the Format menu, where you find the Number option and Time can be selected.

Now, let’s break down the formula. For simplicity, we’ll assume we’re working in row one, starting with cell A1:

=A1+TIME(0,0,0)

In this formula, A1 contains your starting time, while the TIME function breaks the adjustments into hours, minutes, and seconds. Since we haven’t made any changes yet, both A1 and the result cell would show 12:00:00 AM.

Next, you’ll want to replace the zeroes in the formula with actual time values. These values can be drawn from other cells to sum up the total time. Your formula might then look like this:

=A1+TIME(B1,C1,D1)

Here, B1, C1, and D1 represent the number of hours, minutes, and seconds you want to add to the time in A1. For example:

If A1 starts at 12:00:00 AM, and B1, C1, and D1 are populated with 2, 4, and 6, your result will be 2:04:06 AM.

If B1 is 9 and D1 is 38, your final time will be 9:04:38 AM.

It might feel tricky at first, but once you get the hang of it, the Dynamic Time Function can be a powerful tool—whether you’re calculating deadlines or estimating the completion of tasks or processes.

Return to our blogs soon for more great tips and tricks using some of today’s most popular productivity tools like Microsoft Excel.

Previous Post
December 15, 2025
Start Treating Your IT as the Investment It Is
Prevention is better than a cure, as it prevents your business from ever experiencing the problem in the first place. This is especially true for your technology. When businesses invest in IT, they can do so for one of two reasons: they are repairing problems that are costing them in downtime, reputation, and capital, or they are actively preventing those problems through smart implementation of IT. Which side do you want to be on?
December 12, 2025
All Business Owners Should Know How Helpful Software-as-a-Service Is
We’ve all been there: frustrated by the difficulty of installing new software, dealing with licenses that suddenly expire, or constantly needing to upgrade outdated tools just to keep them running. These are classic headaches that come with buying and owning software licenses. Thankfully, there’s a much smarter way to handle things: Software as a Service, or SaaS.
December 10, 2025
Don't Sacrifice Your Holiday Productivity to a Slow Network!
It’s not exactly a secret that the holiday season is—speaking generally—a pretty busy time for businesses. This makes any slowness in your network particularly frustrating to deal with, and potentially alienating to your audience. So what can be done?

Have a project in mind?

Start with our free consultation. We will provide a detailed proposal and firm quote based on your specific IT support needs. All at a predictable monthly cost per seat.
Free Consultation - Sign Up Here