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Funnel Drop Off Calculator

BusinessSales and Conversion
Stages in your funnel

Visitors, sessions or leads at the top.

Overall funnel conversion —
People lost across the funnel
—
Overall drop-off
—
Leakiest step
—
Drop-off at the leakiest step
—
People remaining at each stage
The chart appears with your result

Funnel drop-off at a step is the share of people who reach one stage but not the next: 1 minus (next stage ÷ this stage). With 10,000 visitors, 2,000 adding to cart and 500 ordering, step one loses 80%, step two loses 75%, and overall conversion is 500 ÷ 10,000 = 5%.

About this tool

Growth marketers, product managers and store owners use funnel numbers to decide where to spend effort. A 5% overall conversion says little on its own; knowing that 80% of people leave before the cart and 75% leave at checkout tells you which page to test first. Type the head count at each stage of a 3, 4 or 5 stage funnel and the calculator returns overall conversion, the people lost, the step with the largest percentage drop, a table of step and cumulative rates, and a bar chart of who remains. The maths assumes a closed funnel where every later stage is a subset of the earlier one, so a stage can never be bigger than the one before. Counts from different date ranges or different attribution windows will give misleading rates.

How to use it

  1. Choose the number of stages

    Pick 3, 4 or 5 stages; extra stage boxes appear or hide to match.

  2. Enter the count at each stage

    Start with everyone who entered, then the people who reached each later step, from the same date range.

  3. Read the leakiest step

    The stats name the step with the largest percentage drop and show how big it is.

  4. Check the table and chart

    The table lists each stage's step rate and share of stage 1; the bar chart shows the remaining head count, downloadable as PNG, SVG or CSV.

Examples

10,000 visitors, 2,000 carts, 500 orders

Stages in your funnel
3 stages
Stage 1 (entered the funnel)
10000
Stage 2
2000
Stage 3
500

Result Overall funnel conversion: 5%
People lost across the funnel: 9,500
Overall drop-off: 95%
Leakiest step: Stage 1 → 2
Drop-off at the leakiest step: 80%

  1. Stage 1 → 2: 2000 ÷ 10000 = 20% continue, 80% drop off
  2. Stage 2 → 3: 500 ÷ 2000 = 25% continue, 75% drop off
  3. Overall: 500 ÷ 10000 × 100 = 5%

One in twenty visitors buys. The first step loses 80% of people, more than the 75% lost between cart and order.

Lead funnel 1,000 → 400 → 100 → 25

Stages in your funnel
4 stages
Stage 1 (entered the funnel)
1000
Stage 2
400
Stage 3
100
Stage 4
25

Result Overall funnel conversion: 2.5%
People lost across the funnel: 975
Overall drop-off: 97.5%
Leakiest step: Stage 2 → 3
Drop-off at the leakiest step: 75%

  1. Stage 1 → 2: 400 ÷ 1000 = 40% continue, 60% drop off
  2. Stage 2 → 3: 100 ÷ 400 = 25% continue, 75% drop off
  3. Stage 3 → 4: 25 ÷ 100 = 25% continue, 75% drop off
  4. Overall: 25 ÷ 1000 × 100 = 2.5%

Steps two and three both lose 75%; the earlier one is flagged first. Only 2.5% of the leads that entered reach the final stage.

How it is calculated

step conversion = Sₙ ÷ Sₙ₋₁ × 100; drop-off = 100 − step conversion; overall = S_last ÷ S₁ × 100

Sₙ
number of people at stage n
S₁
number of people entering the funnel
S_last
number of people reaching the final stage

Each step rate compares a stage with the stage directly before it, so it isolates one page or action. The overall rate equals the product of all step rates: 20% × 25% = 5% in the three-stage example. The leakiest step is the one with the highest percentage drop, not the most people lost, because the top step usually loses the most people simply by being largest. Ties go to the earlier step.

When not to use it

  • Open funnels where people can enter at a middle stage break the subset assumption.
  • Revenue or order value questions need average order value, not head counts.
  • Very small stages, under about 30 people, give step rates too noisy to compare.

Common mistakes

  • Mixing sessions at the top with unique users further down inflates drop-off.
  • Taking stage counts from different date ranges makes later stages look larger or smaller than they are.
  • Judging a step by people lost rather than percentage lost always blames the top of the funnel.
  • Counting repeat purchases from one buyer as several people at the last stage.

Frequently asked questions

What is the difference between drop-off rate and abandonment rate?

They describe the same thing at one step: the share of people who reached a stage and did not reach the next. Abandonment usually refers to the cart or checkout step, while drop-off is used for any step in the funnel.

Why does the calculator reject a stage larger than the one before?

In a closed funnel every person at a later stage passed through the earlier ones, so a later count cannot be higher. If your data shows that, the stages probably come from different metrics, such as sessions versus users, or people are entering mid-funnel.

How is overall conversion related to the step rates?

Multiply the step rates together. With 30%, 30% and 30% across three steps, overall conversion is 0.3 × 0.3 × 0.3 = 2.7%. A small gain at any single step lifts the overall figure by the same proportion.

Which step should I improve first?

Start with the step that has the highest percentage drop, shown as the leakiest step, then weigh how easy it is to change. A ten-point lift at a step with 75% drop-off raises overall conversion by 40%, since that step's pass rate goes from 25% to 35%.

What is a normal funnel drop-off?

It varies widely by industry, traffic source and price. Many online stores see only a few percent of visitors purchase, with the largest losses between product view and cart. Compare against your own history rather than a generic benchmark.

Can I use leads and deals instead of website visitors?

Yes. Any sequence of counts works, for example leads, qualified leads, proposals and closed deals, as long as each stage is a subset of the one before and all counts cover the same period.

Cite this tool

Using this tool in an assignment, article or report? Copy a citation, or a link for your website.

APA

Tools Directory Editorial Team. (2026, October 11). Funnel Drop Off Calculator. Tools Directory. Retrieved October 27, 2026, from https://tools.milunir.com/business/sales-and-conversion/funnel-drop-off-calculator/

MLA

Tools Directory Editorial Team. “Funnel Drop Off Calculator.” Tools Directory, 11 Oct. 2026, https://tools.milunir.com/business/sales-and-conversion/funnel-drop-off-calculator/. Accessed 27 Oct. 2026.

Chicago

Tools Directory Editorial Team. “Funnel Drop Off Calculator.” Tools Directory. Last modified October 11, 2026. Accessed October 27, 2026. https://tools.milunir.com/business/sales-and-conversion/funnel-drop-off-calculator/.

Link<a href="https://tools.milunir.com/business/sales-and-conversion/funnel-drop-off-calculator/">Funnel Drop Off Calculator – Tools Directory</a>