Conversion rate:
turn visits into a number you can act on

What is conversion rate?

Conversion rate is the percentage of people who complete a goal out of everyone who had the chance to. The goal might be a purchase, a sign-up, an enquiry form or a phone call, and the people might be visitors, sessions, ad clicks or leads.

It tells you how well traffic is being used. A page that turns 1,000 visitors into 30 orders is working far harder than one that turns 1,000 visitors into 5, even though both received the same number of visits.

Before you calculate anything, decide what counts as a conversion. A sale is the obvious one, but a newsletter sign-up or a click on 'call us' can also be a goal. Measure one goal at a time, because a rate that mixes several goals cannot be improved on purpose.

You will see conversion rate quoted for ads (clicks that became orders), for pages (visits that became sign-ups) and for whole websites. The formula is identical in each case; only the denominator changes.

Conversion rate formula and steps

The calculation is a single division. Take the number of people who completed the goal, divide by the number who could have, and multiply by 100 to express it as a percentage.

1. 1Choose the goal you are measuring and count only completed goals.
2. 2Choose the audience (sessions, users or clicks) and count it for exactly the same dates.
3. 3Divide conversions by that audience.
4. 4Multiply by 100 and round to one or two decimals.

The same formula also works in reverse for forecasting. Conversions = visitors × rate ÷ 100, so 12,000 expected visitors at 2.5% should produce about 300 orders. Treat that as a planning figure, not a promise.

Example: an online store's month

A small online store had 18,400 sessions in a month and 440 orders, with an average order value of ₹1,200.

At that rate the store earns 440 × ₹1,200 = ₹5,28,000 from 18,400 sessions. Because the rate links traffic directly to revenue, even a small change has a visible price tag.

Moving from 2.39% to 3.0% adds 112 orders and ₹1,34,400 without buying a single extra visitor. That is why improving a checkout or landing page is often cheaper than buying more traffic.

Why one blended rate can mislead

The store's 2.39% is an average of very different audiences. Splitting it by traffic source shows where the orders actually come from.

Email converts at 4.5 times the rate of social. If you push more social traffic, the blended rate falls even though nothing on the website has got worse.

The same trap appears with devices and campaigns. Always compare like with like: email against last month's email, not email against social.

Find the leak: conversion rate at each step

An overall rate tells you that something is losing visitors, not where. Breaking the journey into steps shows the stage that deserves attention first.

Multiplying the step rates (0.5 × 0.2 × 0.5 × 0.478) gives back the overall 2.39%. The weakest links are the add-to-cart step and the checkout, where 480 of 920 people leave without paying.

Lifting checkout completion from 47.8% to 55% would turn 920 checkouts into about 506 orders, roughly 66 more a month, with no change in traffic.

Change one step at a time and measure again. If you alter the page, the price and the ad in the same week, you will not know which of them moved the rate.

How to read the result and plan with it

Compare your rate with your own earlier months first, using the same traffic mix. There is no single good conversion rate: it depends on price, how much intent the visitor arrives with and whether they are on a phone or a laptop.

You can also run the formula backwards. To get 500 orders at a 2.5% rate you need 500 ÷ 0.025 = 20,000 visitors. If that traffic costs more than the orders earn, fix the rate before buying more traffic.

Read the trend together with the sample size. A rate that climbs from 2.1% to 2.4% over three months on steady traffic is a signal. A jump from 2.0% to 2.9% in one week on a tenth of the usual traffic is probably not.

Seasonality catches many people out. A festive-season rate is not comparable with a quiet month, so compare the same weeks year on year as well as month on month.

If you track leads rather than website visits, the same idea measures the share of leads that become paying customers. The sales conversion rate calculator on this page handles that version, and the customer acquisition cost guide shows what each of those customers costs you.

Mistakes that distort conversion rate

• Mixing denominators: dividing orders by sessions one month and by unique users the next gives numbers that cannot be compared.
• Different time windows: counting today's clicks against orders that arrive over the next seven days understates the rate.
• Repeat buyers: if one visitor places three orders, count conversions the same way as your denominator, or the rate can exceed 100%.
• Tiny samples: with 40 visitors, one extra sale moves the rate by 2.5 percentage points, which is noise rather than a trend.
• Bot and internal traffic: staff visits and automated hits inflate the denominator and pull the rate down.
• Borrowed benchmarks: a competitor's rate comes from a different product, price and audience, so it says little about yours.