Quick Reference

PM Metrics Cheat Sheet

22 essential formulas every product manager needs, organized by category. Bookmark this page or use Ctrl+P to save as PDF.

Press Ctrl+P (Cmd+P on Mac) to print or save as PDF

SaaS Economics

Customer Lifetime Value (LTV)
LTV = (ARPU x Gross Margin) / Churn Rate

SMB: $1K-$5K | Enterprise: $100K+

Try Calculator
Customer Acquisition Cost (CAC)
CAC = Sales & Marketing Spend / New Customers

Target LTV:CAC >= 3:1

Try Calculator
Monthly Recurring Revenue (MRR)
MRR = Sum of monthly subscription revenue

Good MoM growth: 10-20% (early), 5-10% (growth)

Try Calculator
Churn Rate
Churn = Customers Lost / Starting Customers

Good: < 5% monthly | Great: < 2%

Try Calculator

Prioritization

RICE Score
RICE = (Reach x Impact x Confidence) / Effort

Compare relative scores within backlog

Try Calculator
ICE Score
ICE = Impact x Confidence x Ease

All scored 1-10, higher = higher priority

Try Calculator
Weighted Scoring
Score = Sum(Criterion Score x Weight)

Normalize weights to 100%

Try Calculator
Kano Model
Functional + Dysfunctional questionnaire matrix

Must-be > Performance > Attractive

Try Calculator
Impact/Effort Matrix
2x2 matrix: Impact (Y) vs Effort (X)

Quick Wins (high impact, low effort) first

Try Calculator

Statistical Testing

A/B Test Significance
Z = (p1 - p2) / sqrt(p(1-p)(1/n1 + 1/n2))

p < 0.05 for 95% confidence

Try Calculator
Sample Size
n = (Z^2 x p(1-p)) / e^2

80% power, 95% confidence minimum

Try Calculator
A/B Test Planning
Duration = Sample Size / Daily Traffic

Minimum 2 weeks, avoid peeking

Try Calculator
Net Promoter Score (NPS)
NPS = % Promoters (9-10) - % Detractors (0-6)

Good: 30+ | Excellent: 50+ | World-class: 70+

Try Calculator

Growth & Engagement

Conversion Rate
CR = Conversions / Total Visitors x 100%

SaaS trial: 2-5% | E-comm: 1-3%

Try Calculator
DAU/MAU Ratio
Stickiness = DAU / MAU

Good: 20%+ | Great: 50%+ (like social)

Try Calculator
Retention Rate
Retention = (End Users - New) / Start Users

D1: 40%+ | D7: 20%+ | D30: 10%+

Try Calculator
Product-Market Fit Score
PMF = % "very disappointed" without product

40%+ = PMF achieved

Try Calculator
TAM/SAM/SOM
TAM > SAM > SOM (top-down or bottom-up)

SOM = realistic Year 1-3 target

Try Calculator
ROI
ROI = (Net Gain - Cost) / Cost x 100%

Good: 100%+ | Minimum viable: 20%+

Try Calculator

Execution & Delivery

Sprint Velocity
Velocity = Story Points / Sprint

Track trend over 3+ sprints

Try Calculator
Cycle Time
Cycle Time = Done Date - Start Date

Track P50 and P85 percentiles

Try Calculator

Calculate Any Metric Instantly

Each formula above links to a free, interactive calculator with built-in benchmarks and strategic guidance.

Explore All Calculators
Back to Home