10 Best ROI Calculator Tools for Founders [2026 Updated]

1. MarkeCalc

• Type: Free
• URL: https://markecalc.com/
• Overview: A lightweight marketing ROI calculator built to give instant clarity on campaign performance by comparing spend, revenue, impressions and conversion estimates. It offers both true and estimated calculation modes to help marketers quickly assess campaign effectiveness and projected returns.

2. American Marketing Association - Marketing ROI Calculator

• Type: Free
• URL: https://www.ama.org/toolkits/online-advertising-roi-calculator/
• Overview: A spreadsheet-based ROI calculator and template from the American Marketing Association that lets teams input activity costs, leads, sales and revenue to calculate ROI, CPL and related metrics. It's designed for multi-channel comparison and ready-to-use in Google Sheets or Excel for team reporting and budgeting.

3. CalculateMyROI

• Type: Free
• URL: https://www.calculatemyroi.com/
• Overview: An online ROI calculator that supports campaign-level analysis and provides insights to evaluate marketing performance with simple inputs for spend and revenue. The tool is aimed at marketers who want a fast assessment of campaign ROI and related advertising metrics.

4. ROAS-Calculator (roas-calculator.org) - Google Ads ROAS Calculator

• Type: Free
• URL: https://roas-calculator.org/tools/google-ads-roas-calculator/
• Overview: A focused ROAS/ROI calculator for Google Ads that computes ROAS, profit/loss and suggested target ROAS by campaign type and includes benchmarking tips for Search, Shopping, Display and Video. It helps advertisers set bidding targets and compare channel performance quickly.

5. ConvertMate - Google Ads Performance Calculator

• Type: Free
• URL: https://www.convertmate.io/free-tools/google-ads-performance-calculator
• Overview: A free performance calculator for Google Ads that returns CPC, CPA, ROAS, CTR and conversion rate along with industry benchmark comparisons to identify optimization opportunities. It’s intended for campaign reviews, budget planning and quick performance diagnostics.

6. ROILab - ROI Calculator

• Type: Free
• URL: https://roilab.net/roi-calculator/
• Overview: A versatile ROI calculator that computes ROI, ROAS, gross and net profit using inputs like ad spend, revenue, markup and payment fees, with multiple calculator versions for different scenarios. It’s useful for advertisers who need detailed profit breakdowns alongside ROI figures for various ad platforms.

7. Intuitive Websites - Website ROI Calculator

• Type: Free
• URL: https://intuitivewebsites.com/website-roi-calculator/
• Overview: A website-focused ROI calculator that evaluates how a site’s traffic, conversion rate and average order value translate into revenue and marketing ROI for digital channels. It helps businesses quantify the financial impact of improvements to conversion and site performance.

8. Post Oak Agency - Website ROI Calculator

• Type: Free
• URL: https://postoak.agency/tools/website-roi-calculator
• Overview: A practical website ROI tool from an agency that estimates first-year ROI, conversion impact and channel efficiency using inputs like traffic, conversions and revenue. It’s aimed at brands wanting to justify website investments and optimize digital marketing spend.

9. Gravity Growth - Free Marketing ROI Calculator (B2B focus)

• Type: Free
• URL: https://www.getgravitygrowth.com/roi-calculator
• Overview: A B2B-oriented marketing ROI calculator that models how changes in website conversion, content, and channel performance affect overall marketing returns and pipeline contribution. It provides a structured framework to estimate ROI across B2B campaigns and website initiatives.

10. XennTool - Marketing ROI Calculator

• Type: Free
• URL: https://xenntool.com/calculators/marketing-roi.html
• Overview: A marketing analytics calculator that surfaces ROI, ROAS, CAC and payback period by letting users input spend, revenue and conversion metrics to produce common growth KPIs. It’s designed for growth teams and marketers who need quick KPI calculations for reporting and decision-making.