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audience modelling

How fast does your audience compound?

Enter your current subscriber count and a realistic monthly growth rate to see how compounding plays out over the next one and two years. Built for B2B podcast teams planning their reach.

Free, no sign-up · reviewed by the Fame team · 25 June 2026

try a scenario
subscribers in 12 months1,259
added in year 1759
in 24 months3,171
monthly growth8%
Healthy, steady gains - compounding works strongly in your favour at this rate.
projected subscribers
today500
12 months1,259
24 months3,171
what to do
  • Small, consistent monthly growth compounds - a steady 5-8% beats sporadic spikes.
  • Short clips and guest networks are the fastest discovery engines for a B2B show.
  • Build an email list alongside the feed - it is the one audience you actually own.
Want a podcast that compounds? Fame builds and grows B2B shows that turn listeners into pipeline.
Fame runs the whole show - strategy, guest booking, production and promotion.
See what Fame does

Built by Fame - B2B podcasts that drive pipeline.

how to use it

How to use the growth calculator

  1. Enter your current number of podcast subscribers.
  2. Set the average monthly growth rate you expect, as a percentage.
  3. Read your projected subscriber count at 12 and 24 months.
  4. Adjust the rate to see how small, consistent gains compound over time.
worked example

See it with real numbers

For example, you start with 800 subscribers and expect a steady 6% monthly growth rate. Compounding that month on month, you reach roughly 1,610 subscribers by month 12 and about 3,240 by month 24 - more than quadrupling in two years. Nudge the rate to 8% and the 24-month figure jumps past 5,000. The takeaway: for a B2B podcast, small, consistent monthly gains compound into a far larger audience than a few one-off spikes ever will.

how this is calculated

The method, and what it assumes

Projects how your subscriber count compounds over one and two years from a starting figure and a fixed monthly growth rate.

  • Subscribers in 12 months = start x (1 + monthly rate) ^ 12, compounded monthly and rounded.
  • Subscribers in 24 months = start x (1 + monthly rate) ^ 24.
  • Added in year 1 = the 12-month figure minus your starting subscribers.
  • Defaults are 500 starting subscribers and 8% monthly growth.
  • A rate of 5% or more reads as healthy; below 5% warns growth is slow; 0% just prompts you to enter a rate.

Good to know: It assumes a constant monthly growth rate held steady for two years, with no churn or plateau, so it is a simple compounding projection rather than a forecast.

embed this calculator

Put this calculator on your site

Free to embed. Paste this snippet anywhere your audience plans pricing - it's self-contained, updates live, auto-fits any layout, and links back to the full tool.

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<p style="font:14px/1.5 sans-serif;margin:8px 0 0">Free <a href="https://learn.fame.so/calculators/podcast-audience-growth-calculator">podcast audience growth calculator</a> by Fame</p>
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keep reading

Related resources

Further reading on the Fame blog: Find Your Best-perth-podcast-agency: Top Firms for 2026 →

Subscriber growth

What subscriber growth means and how to measure it.

learn more →

Subscriber

What a podcast subscriber is and why the metric matters.

learn more →

Discovery

How new listeners find your show and how to widen the funnel.

learn more →

Episode promotion checklist

A repeatable checklist to promote every episode and drive subscribers.

learn more →
questions

Frequently asked questions

What is a good monthly growth rate for a B2B podcast?

A steady 5-10% month on month is strong and sustainable for most B2B shows. Spikes are nice, but consistent compounding growth builds a durable audience.

Why does a small change in growth rate matter so much?

Because growth compounds. The difference between 4% and 8% monthly looks small at first, but over 24 months it can more than double your projected audience.

What actually drives subscriber growth?

For B2B shows, the biggest levers are short social clips, guests with their own networks, consistent publishing, and capturing listeners onto an owned email list.

B2B podcasts that drive pipeline

Grow a podcast that compounds.

Fame runs B2B podcasts end to end - strategy, guest booking, production and promotion. Done for you.

See what Fame does