ROI Calculator (Return on Investment)
Use our ROI calculator to quickly measure the return on an investment as a percentage. This tool helps you understand how much profit or return you’ve generated compared to the amount invested.
Enter the original investment amount and the total return to see the percentage return on investment. This calculator is useful for comparing performance across projects, campaigns or spending decisions.
Enter the original investment amount and the total return to see the percentage return on investment. This calculator is useful for comparing performance across projects, campaigns or spending decisions.
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Disclaimer: This calculator provides estimates only and is for general informational use. Last checked and updated January 2026.
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How the ROI Calculator Works
This calculator measures return on investment by comparing the gain from an investment to its original cost. It calculates how much profit has been made relative to the amount invested and expresses the result as a percentage.
It doesn’t just show ROI as a percentage. It also calculates:
It doesn’t just show ROI as a percentage. It also calculates:
It then calculates the percentage return on investment based on the difference between these values.
Inputs Used
The calculator uses two simple inputs:
What the Calculator Calculates
Profit or Loss
Profit or loss is calculated as:
– Return amount − Investment amount
This shows the actual monetary gain or loss.
ROI Percentage
ROI is calculated using the formula:
– (Profit ÷ Investment amount) × 100
This expresses the return as a percentage of the original investment.
Multiple on Investment
This is calculated as:
– Return amount ÷ Investment amount
It shows how many times your original money was returned.
From these, it calculates three key outputs.
Example 1: Marketing Campaign ROI
If you invest £2,000 in a Google Ads campaign and it generates £8,500 in new sales revenue, your profit is £6,500.
Calculation: (£6,500 profit ÷ £2,000 investment) × 100 = 325% ROI.
Multiple: You achieved a 4.25x return on your original spend. This indicates a highly profitable campaign, though you would also need to factor in your profit margins on the goods sold.
Example 2: Business Tool Subscription
If you purchase CRM software for £1,200 a year, and it saves your sales team 10 hours a month (valued at £30/hour), the software saves you £3,600 annually.
Calculation: (£2,400 net savings ÷ £1,200 investment) × 100 = 200% ROI.
ROI isn’t always about direct revenue; it can also measure cost savings and operational efficiency.
Profit or loss is calculated as:
– Return amount − Investment amount
This shows the actual monetary gain or loss.
ROI Percentage
ROI is calculated using the formula:
– (Profit ÷ Investment amount) × 100
This expresses the return as a percentage of the original investment.
Multiple on Investment
This is calculated as:
– Return amount ÷ Investment amount
It shows how many times your original money was returned.
From these, it calculates three key outputs.
Example 1: Marketing Campaign ROI
If you invest £2,000 in a Google Ads campaign and it generates £8,500 in new sales revenue, your profit is £6,500.
Calculation: (£6,500 profit ÷ £2,000 investment) × 100 = 325% ROI.
Multiple: You achieved a 4.25x return on your original spend. This indicates a highly profitable campaign, though you would also need to factor in your profit margins on the goods sold.
Example 2: Business Tool Subscription
If you purchase CRM software for £1,200 a year, and it saves your sales team 10 hours a month (valued at £30/hour), the software saves you £3,600 annually.
Calculation: (£2,400 net savings ÷ £1,200 investment) × 100 = 200% ROI.
ROI isn’t always about direct revenue; it can also measure cost savings and operational efficiency.
Understanding Return on Investment (ROI)
Return on investment is a fundamental metric used to evaluate how efficiently capital is being deployed. A higher ROI indicates a stronger return relative to the cost.
However, standard ROI has limitations. It does not account for the time an investment takes to mature. For example, a 50% ROI generated over one month is drastically better than a 50% ROI generated over five years. It also does not factor in risk; high-ROI projections often carry a higher chance of losing the initial capital. When evaluating business decisions, ROI should always be reviewed alongside cash flow, time horizons, and net profit margins.
However, standard ROI has limitations. It does not account for the time an investment takes to mature. For example, a 50% ROI generated over one month is drastically better than a 50% ROI generated over five years. It also does not factor in risk; high-ROI projections often carry a higher chance of losing the initial capital. When evaluating business decisions, ROI should always be reviewed alongside cash flow, time horizons, and net profit margins.
When Should You Use an ROI Calculator?
This calculator is useful when you want to:
It provides a simple way to evaluate returns without complex calculations.
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About This ROI Calculator
This ROI calculator uses a standard return on investment formula to provide clear and accurate results. It is designed to help users quickly assess investment performance using simple inputs.
While useful for comparison and planning, this tool does not account for risk, time, fees or taxes.
Here at CalcHub, we want to create a one stop shop for all your calculator needs. You can find out how we build our calculators here and if you have a calculator need but cannot find it on our site, just click the “Suggest A Calculator” link at the bottom of any page.
While useful for comparison and planning, this tool does not account for risk, time, fees or taxes.
Here at CalcHub, we want to create a one stop shop for all your calculator needs. You can find out how we build our calculators here and if you have a calculator need but cannot find it on our site, just click the “Suggest A Calculator” link at the bottom of any page.
Frequently Asked Questions
What is return on investment?
Return on investment is a measure of how much profit or gain is made compared to the amount invested.
How is ROI calculated?
ROI is calculated by dividing the profit by the original investment and expressing the result as a percentage.
Can ROI be negative?
Yes. A negative ROI means the investment lost money. If you invest £1,000 and only get £600 back, your profit is -£400, resulting in an ROI of -40%. This is a critical warning sign that a strategy needs to be adjusted or abandoned.
Does this calculator include time or risk?
No. This tool calculates a simple, static ROI. It does not calculate ‘Annualised ROI’, which accounts for the length of time an investment was held. It also does not account for inflation, taxes, or the risk profile of the initial investment.
Can this calculator be used for marketing ROI?
Yes, it works perfectly for marketing. In digital marketing, ROI is often referred to as ROAS (Return on Ad Spend). To calculate this, simply input your total advertising spend as the ‘Invested Amount’ and the total revenue generated from those ads as the ‘Returned Amount’.
Disclaimer
This calculator provides estimates only and should not be relied upon as financial or investment advice.
Last checked and updated January 2026.
Last checked and updated January 2026.