If you are a seasoned PPC pro, chances are you have some above-average analytical ability. But, sometimes even the best of us can get a little overwhelmed by the sheer amount of numbers we need to deal with on a daily basis. Fortunately for us, some enterprising individuals have created some handy web-based calculators to help solve some of the more complex math problems that come up in the course of managing a pay per click advertising account. Here are some of my favorites:
Split Test Calculator – This handy calculator by the folks at UserEffect.com is probably one of my favorites. It calculates the conversion rate of each treatment in your split test and tells you whether or not your result is statistically significant at a 90% confidence interval. Even better, it estimates how many more hits you’ll need on your test if you haven’t reached statistical significance yet. Just plug in the number of hits to your test in the “visitors” field, and the number of conversions in the “goals” field, hit “Calculate,” and you’re good to go.
A/B Split and Multivariate Test Duration Calculator – Don’t know how long you’ll need to run a test until you reach significance? This calculator can help you out. Enter the number of variations of the ad or landing page you’re going to test, your average daily visitors, and the kind of results you want to see, and this calculator will estimate how long you can expect to run the test before you see your result. This is really handy when you’re planning out your new tests. If you have a client or a supervisor that’s asking you for a testing timeline, this is your go-to tool to get that information.
PPC ROI Calculator – PPC campaigns can cost a lot of money, and it can be a little tricky to see if your profits are greater than the money you’re spending on advertising. This ROI calculator takes the heavy lifting out of PPC return on investment calculation. Here, you can enter your clicks, average cost per click, conversion rate, and the average profit you make per conversion. The tool will then tell you what percentage of ROI you’re getting out of your PPC efforts.
PPC Testing Statistical Significance Calculator – Need to determine whether or not your PPC split-testing results are statistically significant? Chad Summerhill has put together a really nice Excel spreadsheet that does all the statistical analysis for you. You can download it for free at this link.
Date Duration Calendar – Sometimes you need to compare results between two identical time periods. But, since the number of days in a month vary, it can be tough to count out the exact number of days within a test range. This calculator makes the job a lot quicker. You can type in your start date and end date, and get the exact number of days between each date. You can then use this information to determine what date range you need to look at in comparison.
World Time Difference Calculator – If you manage PPC accounts that cover multiple countries or regions, it can be a real hassle working out your ad scheduling. This is even worse if you have your default time zone set to your home base, and you need to figure out some scheduling adjustments based on the local time in another country. It helps to have a good time zone converter like this one to help you figure out what time it is in another part of the world (and get the total hour difference between two zones) so that you can make sure that your ad scheduling starts and stops at the right time.
Got any more useful calculators? Let’s hear about them in the comments.