There isn’t a one-size-fits-all formula for calculating return on investment (ROI) from influencer marketing campaigns, but following a basic process can offer insights:

1. Identify Objectives: Are you aiming for brand recognition, new followers, product sales, or something else? Define what success looks like upfront.

2. Track Metrics: Use analytics solutions (like the analytics dashboard in Flinque or similar platforms) to track how well you’re meeting these goals.

3. Calculate Cost: Include not just payment to the influencer, but any related expenses such as product costs, creative fees, and platform fees.

4. Calculate ROI: This is often a matter of dividing the value of your achieved objectives by the total cost of the campaign, then multiplying by 100 to get a percentage.

Each campaign and brand may have unique factors to consider, so the formula may be adjusted accordingly. For e-commerce oriented brands, platforms like Shopify offer integrations which help attribute sales to specific influencers or campaigns. Service-geared brands might consider lead generation tracking systems.

Comparatively, other platforms like CreatorIQ, Upfluence, and Julius offer similar analytics and tracking functionalities. It’s essential to choose a platform that aligns with your specific goals and infrastructure.

Remember that ROI isn’t just about short-term sales. Influencer marketing can also lead to ongoing audience growth, increased brand recognition, and lasting partnerships with influencer themselves, all of which have long-term value. It’s crucial to take a holistic view of the results.