CREATORAXIS
The creator economy, measured — engagement, rates, and growth for creators and the brands who work with them.
From measuring engagement and estimating a fair sponsored-post rate to working out CPM, projecting follower growth, calculating campaign ROI, and estimating ad-revenue earnings, CreatorAxis pairs free hands-on calculators with honest, practical guides. Numbers you can actually check your work against — not hype.
Creator Economy Calculators
Free tools for creators and the brands who work with them — engagement rate calculator, influencer rate estimator, CPM calculator, follower growth projector, campaign ROI calculator, and a creator earnings estimator.
Engagement Rate Calculator
Calculate engagement rate from likes, comments, shares, and saves — by follower count or by reach, with notes on what counts as healthy per platform.
Influencer Rate Calculator
Get a suggested sponsored-post rate from follower count, engagement rate, platform, and content format — an estimate to negotiate around.
CPM Calculator
Solve for CPM, total campaign cost, or impressions — enter any two of the three and get the third instantly.
Follower Growth Calculator
Project your follower count forward from a monthly growth rate or typical monthly gain, with a month-by-month table.
Campaign ROI Calculator
Calculate ROI% and ROAS from spend and revenue, or from conversions and revenue per conversion.
Creator Earnings Estimator
Estimate ad-revenue-style earnings from views and platform RPM — a low/mid/high range built for planning, not a promise.
Museum of Media & Advertising
Wander an illustrated tour of how media and advertising got here — vintage print ads and billboards, the broadcast technology of radio and television, the cameras and recording gear that shaped how we capture images, and the printing presses and publications that came before any of it, each in its own gallery, drawn entirely from Wikipedia and Wikimedia Commons.
Tour the museum →From the Journal
Practical guides on engagement metrics, brand-deal pricing, growth benchmarks, and campaign performance — reading to pair with the calculators above.
How to Calculate Engagement Rate (and What Counts as Good)
Engagement rate is interactions divided by an audience size — but which audience? A walkthrough of the by-followers and by-reach versions, with a worked example and realistic benchmarks.
What to Charge for a Sponsored Post: A Practical Pricing Framework
There's no official rate card for influencer marketing. Here's a transparent, formula-based way to build a starting number — audience size, content format, and engagement, combined into one estimate.
CPM Explained: What Brands Actually Pay for Impressions
CPM — cost per mille — is one of the oldest metrics in advertising, borrowed from print and broadcast long before the internet. Here's what it means, how to calculate it both directions, and when it's the wrong metric to optimize for.
How Fast Should Your Follower Count Be Growing? Realistic Growth Benchmarks
There's no universal follower-growth target, but the shape of realistic growth is predictable — it compounds, it slows as accounts mature, and month-to-month noise is normal. A framework for setting your own benchmark.
ROI vs ROAS: The Two Numbers Every Brand Should Track
Return on investment and return on ad spend describe the same campaign performance in two different formats — one as a percentage, one as a multiple. Here's how they relate, and when each one is the more useful number to quote.
RPM and Ad Revenue: How Creator Earnings Actually Work
RPM is the number that actually determines a creator's ad-revenue payout — and it's a different, always-lower number than the CPM advertisers pay. Here's the distinction, why RPM varies so much, and how to estimate a range honestly.
Keep Learning
Plain-language reference on the concepts behind the calculators — what engagement and reach actually measure, how advertising and marketing are structured, and how creators and brands monetize attention — everything you need to go deeper with confidence.
Visit the Learn hub →