Calculate MRR, ARR, churn rate, LTV, CAC, and other essential SaaS metrics. Free tools to measure and optimize your subscription business performance.
SaaS businesses live and die by their metrics. Understanding your MRR, churn rate, and unit economics is essential for making informed decisions about growth, pricing, and fundraising.
These calculators help you track the key performance indicators that investors care about most: Monthly Recurring Revenue (MRR), Customer Lifetime Value (LTV), Customer Acquisition Cost (CAC), and the critical LTV:CAC ratio that determines your business efficiency.
Whether you're preparing for a fundraise, optimizing your pricing strategy, or just trying to understand your business better, these tools provide the clarity you need to make data-driven decisions.
Monthly Recurring Revenue (MRR) is the predictable revenue a SaaS business generates every month from subscriptions. It's the most important metric for SaaS businesses because it provides visibility into future revenue and helps measure growth, retention, and the overall health of the business.
LTV is calculated by dividing your Average Revenue Per User (ARPU) by your churn rate. For example, if your ARPU is $100/month and your monthly churn is 5%, your LTV would be $100 / 0.05 = $2,000. This tells you how much revenue you can expect from an average customer over their lifetime.
A healthy LTV:CAC ratio is typically 3:1 or higher, meaning you earn $3 for every $1 spent on customer acquisition. Ratios below 1:1 indicate you're losing money on each customer. Top-performing SaaS companies often achieve 5:1 or higher ratios.
Churn rate is calculated by dividing the number of customers lost during a period by the total customers at the start of that period. For example, if you start with 1,000 customers and lose 30, your monthly churn rate is 3%. For revenue churn, use MRR lost instead of customer count.
Net Revenue Retention measures how much revenue you retain from existing customers after accounting for churn, downgrades, and expansion revenue (upgrades, cross-sells). An NRR above 100% means your existing customers are generating more revenue over time, even without new customer acquisition.
Burn rate depends on your funding stage and growth rate. Early-stage startups often burn 10-20% of their funding monthly. The key metric is runway - you should have 12-18 months of runway before your next fundraise. Y Combinator recommends maintaining at least 6 months of runway at all times.