Planning Calculators

Conversion rate optimization calculators. A/B test sample size, page speed revenue impact, PDP elements, cart abandonment, upsell economics, and the math behind moving CR.
A/B Test Sample Size
How long to run your test.
Conversion Rate Impact
Revenue from CR improvement.
Cart Abandonment Revenue
Revenue in abandoned carts.
Page Speed Revenue
Cost of slow load times.
Revenue per Visitor (RPV)
Revenue per session with industry benchmarks.
Add-to-Cart Rate
ATC rate with industry benchmarks.
Upsell / Cross-Sell Revenue
Revenue impact of post-ATC offers.
Mobile vs Desktop CR Gap
Revenue lost to mobile conversion underperformance.
A/B Test Velocity
How many tests / month at your traffic level.
Checkout Friction Estimator
Score your checkout flow — steps, fields, friction.
PDP Conversion Elements
Which product page elements drive most lift.
Upsell Bump vs Post-Purchase
Where to put the upsell: cart bump or post-purchase.
About planning calculators

CRO is the highest-ROI work in ecommerce when done well and the lowest-ROI when done poorly. The difference is whether you have enough traffic to detect changes and the discipline to make decisions on statistical significance rather than vibes. The calculators in this category quantify both the methodology (sample size, test velocity) and the impact (revenue per visitor, conversion rate lift, AOV uplift).

These 12 tools cover the full CRO program: planning (A/B sample size calculator, test velocity, conversion rate impact modeling), diagnosis (cart abandonment, checkout friction, page speed revenue), and execution (PDP element prioritization, upsell economics, cross-sell revenue). Each tool answers a specific operational question.

The benchmarks worth knowing: median Shopify conversion rate is 1.4% across all stores, with apparel at 1.8%, beauty at 2.4%, electronics at 1.1%. Top quartile runs 1.5-2× the median. PDP optimization (reviews, video, sizing info) typically lifts CR by 15-30%. Page speed: every second of delay drops CR 5-7%. Cart abandonment averages 70%+ across ecommerce.

The strategic insight: most operators run CRO programs at insufficient traffic levels. Below ~200K monthly sessions, A/B tests on individual pages take 4-8 weeks to reach significance. Better to focus on whole-funnel diagnosis (where do users drop off?) and high-leverage element-level fixes (Shop Pay enabled, reviews on PDP, fast page load) until traffic supports proper testing.

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