Funnel Conversion Rate Calculator

Compute stage-by-stage conversion rates, forecast output, and find required lead volume. Built for founders, PMs, and growth teams. Everything runs in your browser—no data sent.

Estimates only. Verify with your own data.

Funnel Stages

Precision

Stage 1 Name

Volume (units)

Conversion to Next

(Starting stage)

Stage 2 Name

Conversion Rate (%)

Stage 3 Name

Conversion Rate (%)

Assumptions Used

Conversion rates are applied sequentially from the previous stage.
All inputs are independent; no cross‑stage dependency modeled.

Results

Overall Conversion Rate

2.5%

Final Stage Volume

Stage‑by‑Stage Breakdown

Stage	Volume	Cumulative Rate
Leads	1,000	100.0%
MQLs	250	25.0%
Customers	25	2.5%

Target Solver

Find required leads for a target final volume.

Target Final Output

Required Leads

2,000

Understanding Your Funnel

Why This Matters

Funnel conversion analysis helps you pinpoint where prospects drop off, forecast future results, and set realistic goals for sales, marketing, and product teams.

By knowing your conversion rates, you can:

Allocate budget to the most effective channels.
Set accurate quotas and hiring plans.
Identify process bottlenecks that need improvement.

What Each Input Means

Input	What It Represents	Where to Find It
Stage Volume	Absolute count of leads/users at that stage in a given period.	CRM, marketing analytics, sales pipeline report.
Conversion Rate (%)	Percentage of the previous stage that moves to this stage.	Calculate from stage volumes: (Next Stage / Previous Stage) × 100.

Common Mistake: Mixing monthly and quarterly rates, or using gross leads without filtering out invalid entries.

Step‑by‑Step Guide

Define your funnel stages (e.g., Lead → MQL → SQL → Customer).
Enter the absolute volume for the first stage (e.g., 1,000 leads this month).
For each following stage, enter the conversion rate from the previous stage (e.g., 25% of leads become MQLs).
Add or remove stages as needed (max 10).
Review the breakdown table to see volume and cumulative rate at each stage.

Realistic Examples

Example 1: SaaS Free‑to‑Paid

Visitors (5,000) → Sign‑ups (8%) → Active Users (60%) → Paying (5%). Overall rate: 0.24%. Final customers: 12.

Example 2: E‑commerce Checkout

Sessions (10,000) → Add to Cart (12%) → Checkout Started (70%) → Purchase (15%). Overall rate: 1.26%. Final orders: 126.

Common Mistakes Checklist

Using inconsistent time periods (e.g., weekly rate with monthly volume). Not excluding internal/test entries from lead counts. Assuming conversion rates are constant across segments. Forgetting to account for lead‑to‑customer time lag.

Interpretation Guide

If your overall rate is lower than expected: Look for the largest percentage drop between stages—that’s your biggest bottleneck.

Before acting: Double‑check that your input volumes are from the same cohort and time window. Segment by channel if possible.

Frequently Asked Questions

How accurate is this calculator?

It provides precise arithmetic based on your inputs but assumes rates are independent and constant. Real‑world funnels have variability, seasonality, and segment differences.

Should I use gross or net leads?

Use net qualified leads after removing duplicates, bounces, and invalid entries. This gives a clearer picture of actual process efficiency.

What time period should I use?

Use consistent periods for all inputs (e.g., all monthly). If stages have different cycle times (e.g., lead‑to‑MQL is weekly, MQL‑to‑customer is quarterly), adjust volumes to a common timeframe.

When should I involve a finance/ops specialist?

When using these numbers for budgeting, forecasting, or headcount planning—especially if the financial impact is material. They can help incorporate uncertainty and external factors.

Formulas & Assumptions

Core Formula:

Final Volume = Stage1 Volume × (Rate2/100) × (Rate3/100) × …

Overall Conversion Rate = (Final Volume / Stage1 Volume) × 100

Cumulative Rate to Stage N = Product of all conversion rates up to N (as percentage).

Assumptions: Conversion rates are sequential, multiplicative, and time‑independent. No re‑entry or branching between stages.

Rounding: Results rounded to the selected decimal places. Volumes rounded to nearest whole number.

For informational and educational purposes only. Estimates depend on your inputs and simplifying assumptions. This tool does not replace professional financial, accounting, or operational advice.

Sources & References

Basic business math for margins, pricing, and break‑even • General SaaS metrics definitions (MRR, churn, LTV, CAC) • Operations concepts: utilization, capacity planning

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