Comment-to-DM ROI calculator

People asking each month is posts a week times 4.33 weeks, times the comments on a post, times the share that ask for the link. The home page calculator uses the same sum. Four posts a week with 80 comments each, 30% of them asking, is about 416 people a month.

Comment-to-DM then has three steps. Instagram and Messenger allow only plain text in the first message to a commenter, so the first DM asks them to reply, and the link card follows once they do. That makes “reply to the first DM” a real drop-off in the funnel. At the starting numbers, 40% reply (166 people), half of them open the link (83) and 3% buy, which is about 2.5 sales.

Link in bio has one step in this model: of the same 416 interested people, the share who go to your profile and click. At 8% that is 33 clicks and about 1 sale. The difference is about 1.5 sales a month, or $45 at $30 a sale. Against Pro’s $9 a month, roughly $36 is left. Those starting numbers are examples to overwrite, not findings.

Plan prices and limits are read from DMFast’s own plan definitions, so they follow the pricing page. “Smallest that fits” picks Free while the people asking stay within its 100 people a month, and Pro, with no monthly limit on people, beyond that. You can force Growth or Business to see them against your numbers. Free costs nothing, so there the difference is the whole gain.

• If more people ask than the plan allows, the extra people get no DM, and the tool counts them as using your link in bio instead.
• Meta’s rules apply: one private reply per comment, within 7 days of the comment.
• Rupees are converted from the dollar prices at a rate you can edit.
• Revenue is revenue, not profit. Subtract your costs separately.

It doesn’t count the time saved by not replying by hand, which for many people is the main reason to automate. It doesn’t count people who would have bought anyway, so the difference can overstate what the DM flow adds. And it holds every rate constant, even though a person who commented has already raised a hand in a way a profile visitor may not have.

Treat the result as a way to find which rate matters. Change the reply rate from 40% to 20% and watch the sales; then do the same with the bio click rate. Whichever swings the answer most is the number to measure for real, with link tracking and your own sales records.

Tip: Measure before you trust it: tag the link in your DM and the link in your bio differently, run both for a month, then enter what you saw.