Return on investment Calculator

How to calculate return on investment

This tool calculates return on investment from Gain after costs, Initial investment. Enter each quantity in its labelled field, then use the formula below to check the calculation.

Formula

net gain ÷ investment × 100

Worked example

Gain after costs

300

Initial investment

1,000

Applying the formula to these values gives 30 %.

What should I check?

Explore loan repayment estimates, interest, profit margins, pricing and business costs. Enter your own rates and costs; these tools provide arithmetic estimates rather than financial advice.

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