Calculator Inputs
Enter your startup performance values below. The result block appears above the form after submission.
Formula Used
1. Overall growth: ((Ending Value − Starting Value) ÷ Starting Value) × 100
2. Compound growth per selected unit: ((Ending Value ÷ Starting Value)^(1 ÷ Periods) − 1) × 100
3. Monthly equivalent growth: ((Ending Value ÷ Starting Value)^(1 ÷ Total Months) − 1) × 100
4. Monthly churn equivalent: 1 − (1 − Period Churn)^(1 ÷ Months per Unit)
5. LTV: (ARPU × Gross Margin) ÷ Monthly Churn
6. CAC: Acquisition Spend ÷ Net New Customers
7. Payback months: CAC ÷ (ARPU × Gross Margin)
8. Forecast revenue: Ending Revenue × (1 + Monthly Growth × Damping Factor)^(Forecast Months)
9. Momentum score: Weighted score from revenue growth, customer growth, efficiency, and retention.
How to Use This Calculator
Enter your starting and ending revenue first. Then add starting and ending customer counts for the same time window.
Choose the measurement length and its unit. This lets the model convert your growth into comparable monthly values.
Provide churn, acquisition spend, and gross margin. These inputs power the efficiency, LTV, CAC, and payback calculations.
Add forecast periods and a damping factor. Higher damping keeps more of the present growth rate in the projection.
Press Calculate Growth. The result card appears above the form and includes export buttons for CSV and PDF.
Example Data Table
| Example Metric | Sample Value | Notes |
|---|---|---|
| Starting Revenue | $20,000 | Revenue at month one. |
| Ending Revenue | $38,000 | Revenue after six months. |
| Starting Customers | 420 | Active customers at the baseline. |
| Ending Customers | 690 | Active customers at the ending point. |
| Churn per Month | 3.5% | Monthly churn assumption. |
| Acquisition Spend | $25,000 | Total acquisition cost across the period. |
| Monthly Revenue Growth | 11.29% | Equivalent compound monthly revenue growth. |
| LTV:CAC Ratio | 13.26x | Indicates very strong value relative to spend. |
FAQs
1. What does startup growth rate mean here?
It measures how quickly revenue and customers are expanding across a chosen time period. This calculator also adjusts the view using churn, acquisition cost, and gross margin so the result is more useful than a simple percentage change.
2. Why does the calculator show monthly equivalent growth?
Monthly normalization makes different time windows comparable. A six month study and a two quarter study can be translated into the same monthly growth basis for cleaner planning, benchmarking, and reporting.
3. How is churn used in the model?
Churn lowers the effective net growth picture. The calculator converts churn into a monthly equivalent, then compares it against monthly revenue expansion and uses it inside the LTV estimate.
4. What is the purpose of the damping factor?
The damping factor keeps forecasts realistic. A value like 0.80 assumes future growth will continue, but at only eighty percent of the current monthly pace instead of the full rate.
5. What does the momentum score represent?
It is a weighted composite score from revenue growth, customer growth, efficiency, and retention. The score gives a fast summary of whether growth looks hyper, strong, stable, fragile, or declining.
6. Can I use this for pre-revenue startups?
Not ideally. The current model requires positive starting and ending revenue to calculate compound growth. Pre-revenue teams can still adapt it later by using qualified pipeline or active user value instead.
7. Why might CAC or payback show N/A?
That usually happens when net new customers are zero or when gross profit per customer is too small for a meaningful payback estimate. The calculator avoids dividing by invalid values.
8. What should I export, CSV or PDF?
Use CSV when you want to analyze results in spreadsheets or dashboards. Use PDF when you want a quick report for meetings, documentation, or stakeholder sharing.