Calculate stage-by-stage conversion rates and drop-off rates for your marketing funnel, then reverse-calculate how many visitors you need at each stage to hit your final conversion target. Includes ad, lead, and commerce funnel presets. Add, remove, and rename stages freely. Everything runs in your browser.
"2% of visitors convert to a purchase" doesn't tell you what to fix. In a 4-stage funnel (visit, cart, checkout start, purchase), that 2% overall figure could come from a weak first step (visit to cart) or from people abandoning right before checkout, and the fix is completely different depending on which.
This calculator computes the conversion and drop-off rate between each pair of adjacent stages, so instead of one aggregate number, you can point directly at where the most people are actually leaving.
Where the normal mode answers "what's my conversion rate right now," reverse mode runs the other direction. Given expected conversion rates at each stage, it answers something like "how many visitors do I need to land 100 purchases this month," walking backward from the final target to the count needed at every stage above it.
Required count at the previous stage = ceil(next stage's target / conversion rate), always rounded up so you never fall short of the target. Use it before a campaign launches to gauge the traffic scale you'll need, and treat that visitor count as the starting point for an ad budget plan.
Common funnel shapes, ad, lead, and commerce, load instantly as presets, and stage names and count (2 to 10 stages) are fully editable to match how your business actually works. If a later stage comes out higher than the one before it (retargeting inflow, duplicate events, and so on), the calculator shows a warning but still runs the calculation.
The biggest drop-off is the first step, visit to cart (80% lost). That means the product page or first impression needs attention before the checkout flow does.
Reverse mode surfaces the traffic scale you need before a campaign starts, letting you plan an ad budget backward from that visitor count.
A normal funnel shrinks at each stage, but mixing in users who returned via a retargeting ad can invert that. The calculation still runs; it's just flagged.
What it is, who it's for, how it works and why you'd use it.
Funnel Conversion Calculator is a tool that computes stage-by-stage conversion rates and drop-off rates for a marketing funnel, and reverse-calculates the number of visitors needed at each upper stage to hit a final conversion target.
It is for marketers analyzing and optimizing funnels, PMs improving conversion rates, and small business owners understanding their online sales funnel.
Enter stage names and counts. The calculator instantly shows conversion rate, drop-off rate, and drop-off count for each step, plus the overall conversion rate. Switch to reverse mode, enter a final target and stage conversion rates, and it calculates how many visitors you need at every stage.
Funnel analysis pinpoints where most visitors drop off, letting you prioritize improvements. Reverse-calculating required traffic helps you set realistic ad budgets before a campaign launches.