Compute CAC payback months — how fast customers repay acquisition cost. Prove 12-month payback to investors — free, local, no signup.
Compute return on ad spend from revenue and cost — know every dollar's payback. Prove 4:1 ROAS before scaling — free, local, no signup.
Divides total sales-and-marketing spend by the number of new customers acquired in the same period to produce a blended acquisition cost. Startups and growth teams use CAC to evaluate marketing channel efficiency, optimize ad spend, and benchmark against LTV.
Compute monthly burn and runway from starting balance, ending balance, and months elapsed. Know exactly how many months remain — free, local, no signup.
Compute gross margin from revenue and costs — know exact profitability. A $30 sale at $20 cost margins 33% — free, local, no signup.
Compute profit and loss from revenue, costs, and expenses with margin percentages. Close the month knowing exact numbers — free, local, no signup.
Under 12 months excellent, 12–18 acceptable, over 24 dangerous without strong retention. Payback plus gross margin tells the full story.
CAC divided by monthly revenue per customer (MRR) — no margin factor, explicit Calculate click. Both presets (CAC $500/MRR $50 and CAC $1,000/MRR $100) give 10.0 months; under 12 reads Healthy.
Cut CAC (channels), raise ARPA (packaging), or lift margins — in that speed order. Annual prepay pulls cash forward instantly.
No — math runs locally in your browser. Figures never leave your device.
Last updated October 2026