SaaS metrics calculator
The numbers an investor asks for and a founder guesses at. Type what you know, and every figure comes back with what it actually means.
1. Your numbers
2. What that means
Monthly recurring revenue — the predictable subscription income you bill every month.
MRR × 12. The annual run rate: what a year looks like if today never changed.
New MRR minus churned MRR. Negative means you are refilling a leaking bucket.
The share of your MRR that cancelled or downgraded this month.
The share of customers lost, estimated from churned revenue at your average account size.
1 ÷ monthly churn rate. How long the typical customer stays before cancelling.
ARPA × gross margin × lifetime. The gross profit one customer produces before leaving.
Sales + marketing spend ÷ new customers. What one new customer costs you to win.
Healthy. Under 1× you lose money on every customer, 1–3× is thin, 3× and above is healthy.
Months of gross profit needed to earn back what you paid to acquire the customer. Under 12 is comfortable.
3. Stripe fees
Stripe’s published US standard rates. Your rates vary by country, product and negotiated pricing — check your own dashboard before quoting these to anyone.
2.9% + $0.30 — the standard domestic online card rate.
2.9% of the charge plus $0.30, taken before the money reaches you.
What lands in your Stripe balance from that charge.
Rounded up to the cent, so the payout clears your target rather than landing a cent short.