What is conversion rate?
Conversion rate is the share of visitors who complete your goal action — a purchase, signup, demo request, or any event you define as a conversion.
Conversion rate = (Conversions ÷ Visitors) × 100
If 10,000 people visited your store and 250 placed an order, your conversion rate is (250 ÷ 10,000) × 100 = 2.5%.
How to calculate conversion rate (step by step)
- Define one primary conversion — purchase, trial start, or demo booked (don't mix types in one rate).
- Pick a time window — same period for visitors and conversions.
- Count visitors or sessions from analytics (be consistent week to week).
- Divide conversions by visitors × 100 — result is your conversion rate %.
Worked example: Shopify store (monthly)
| Metric | Value |
|---|---|
| Sessions | 48,000 |
| Orders | 1,200 |
| Conversion rate | 2.5% |
| Paid traffic share | 60% |
| Ad spend on paid | $14,400 |
| Paid sessions | 28,800 |
Paid-only rough CAC proxy: if 60% of orders came from paid (720 orders) and spend was $14,400 → **$20** media cost per order before COGS — use the full CAC calculator when including overhead.
Lift scenario: improve checkout from 2.5% → 3.0% on the same 48,000 sessions → 1,440 orders (+240). Same traffic, +20% more revenue — often cheaper than buying 20% more ads.
Worked example: B2B demo funnel
| Stage | Count | Rate |
|---|---|---|
| Landing page visitors | 2,000 | — |
| Demo form submits | 100 | 5.0% landing CVR |
| Qualified demos | 60 | 60% of leads |
| Closed deals | 12 | 20% lead-to-customer |
Landing conversion rate (5%) drives CPL; close rate drives CAC. Optimize the stage that is furthest below benchmark.
Conversion rate vs. CTR
Don't confuse this with CTR, which measures clicks on an ad divided by impressions. Conversion rate happens after the click — on your landing page or checkout. A strong CTR with a weak conversion rate usually means a targeting or landing-page problem, not an ad creative problem. Use the CPM & CPC calculator for CTR at the ad level and this tool for on-site performance.
Why it matters for unit economics
Conversion rate sits between ad cost and customer value. If you spend $2,000 on ads that send 5,000 clicks and convert at 2%, you get 100 customers — a $20 cost per acquisition before overhead. Raise conversion rate to 3% with the same traffic and CAC drops to ~$13 without changing ad spend.
The same logic flows to ROAS: more conversions from the same clicks means more revenue per ad dollar. CRO (conversion rate optimization) is often the highest-ROI marketing work because it compounds every channel at once.
How to improve conversion rate
Prioritize by drop-off data, not guesswork:
- Message match — ad headline promise = landing page headline (fixes high CTR / low CVR).
- Mobile checkout — ecommerce mobile CVR often trails desktop by 30–50%.
- Speed — each second of load time costs conversions on paid traffic.
- Trust — reviews, guarantees, clear shipping/return policy.
- Offer clarity — one primary CTA; remove competing links on landing pages.
Run one change at a time, measure a full business cycle, and compare against your own baseline. Pair with AOV tests — higher conversion and higher order value moves LTV:CAC fastest.