Back to Tools

Free YoY Growth Calculator

Calculate your year-over-year growth rate for revenue, subscribers, users, or any metric. Compare against industry benchmarks, track multi-year trends, and get CAGR calculations — all in one tool.

About this tool

Year-over-year (YoY) growth is the single most important metric for measuring business momentum. Unlike month-over-month comparisons, YoY growth eliminates seasonal bias — so a holiday spike in December doesn't make your numbers look artificially good compared to November.

Our YoY calculator goes beyond a simple percentage. It gives you industry-specific benchmarks so you know if your 25% growth is "good" or "meh" for your space. It calculates your doubling time (how long until you 2x at this pace), and the multi-year mode gives you CAGR — the number investors and analysts care about most.

For email marketers, tracking YoY subscriber growth and engagement rates is crucial. If your list growth rate is strong but your open rates are declining year-over-year, you might be adding low-quality subscribers. Pair this with our churn rate calculator to get the full picture of your growth health.

If you're tracking monthly trends instead, check out our month-over-month growth calculator for shorter-term analysis.

Frequently Asked Questions

How do you calculate year-over-year growth?

The YoY growth formula is: ((Current Period Value - Previous Period Value) / |Previous Period Value|) × 100. For example, if your revenue was $100,000 last year and $130,000 this year, your YoY growth is ((130,000 - 100,000) / 100,000) × 100 = 30%.

What is a good YoY growth rate?

It depends on your industry and stage. For early-stage startups, 100-200%+ is expected. For established SaaS companies, 20-40% is strong. For e-commerce, 15-30% is solid. Enterprise companies typically see 10-20%. The key is comparing against your specific industry benchmarks, not arbitrary numbers.

What is the difference between YoY growth and CAGR?

YoY growth measures the change between two consecutive years (e.g., 2024 vs 2023). CAGR (Compound Annual Growth Rate) smooths out growth over multiple years to give you an average annual rate. If your growth was 50% in year 1, 20% in year 2, and 10% in year 3, each year's YoY is different, but CAGR gives you one number that represents the overall trajectory.

Why is YoY better than month-over-month for measuring growth?

YoY eliminates seasonal variation. Many businesses see natural spikes (Black Friday for retail, January for gyms, Q4 for B2B) and dips (summer slowdowns). Comparing January 2025 to January 2024 gives you a true apples-to-apples comparison, while comparing January to December would mix seasonal effects with actual growth.

How do I calculate doubling time from YoY growth?

Use the Rule of 72: divide 72 by your annual growth rate. At 20% YoY growth, you'll double in about 3.6 years (72 / 20). For a more precise number, use the formula: Doubling Time = ln(2) / ln(1 + growth rate). Our calculator does this automatically.

Can YoY growth be negative?

Yes. Negative YoY growth means the metric has declined compared to the same period last year. A -10% YoY growth means you have 10% less than you did a year ago. While this is concerning, it's important to understand why — it could be a market downturn, a strategic pivot, or a one-time event.

What is the difference between YoY and YTD growth?

YoY (Year-over-Year) compares the same time period across two years — for example, Q3 2025 vs Q3 2024. YTD (Year-to-Date) compares the cumulative total from January 1st to today against the same period last year. YTD is useful mid-year to see if you're on track, while YoY gives cleaner periodic comparisons.

How do I track YoY growth for email marketing metrics?

Track these metrics YoY: subscriber count (list growth), open rates, click-through rates, revenue per email, and unsubscribe rates. Use your email platform's analytics to pull the same date ranges from each year. If your subscriber count is growing but engagement rates are declining YoY, you may be adding low-quality subscribers.

Compare email marketing software

Hands-on roundups to help you pick the right platform.

More Free Tools

View all tools

Email Marketing Calculator

Calculate your email campaign performance with our all-in-one marketing calculator. Measure open rates, click-through rates, ROI, and conversion rates with industry benchmarks.

Subject Line Tester

Optimize your open rates with our AI-powered subject line tester. Get scores on emotional impact, length, and keyword effectiveness.

UTM Link Builder

Generate UTM parameters for your email campaign links to track performance in Google Analytics. Create consistent, well-formatted tracking URLs for all your email marketing campaigns.

A/B Test Significance Calculator

Calculate if your email A/B test results are statistically significant. Enter your sample sizes and conversion rates to know if you can trust your test results or need more data.

Related reading