ROI Calculator

Free ROI calculator for investors. Enter initial investment and final value to see ROI percentage, annualized return, and total gain. Compare multiple investments side by side, see growth projections, and calculate time to double using the Rule of 72.

Investment Amount ($)

Final Value ($)

Time Period

Period Unit

Return on Investment

+50.00%

Annualized ROI

+14.47%

Total Return

+$5,000.00

Final Value

$15,000.00

ROI = ($15,000.00 - $10,000.00) / $10,000.00 = 50.00%

Break-Even & Rule of 72

Years to Double (Rule of 72)

5.0years

72 / 14.5 = 5.0 years

Rule of 72 Explained

Divide 72 by the annual return rate to estimate how many years it takes to double your investment. This is a quick approximation that works best for rates between 6% and 10%.

Investment Growth Over Time

$0$7.5K$15.0K

Initial investment: $10,000.00

What If? ROI Comparison (3 years)

Annual Rate	Final Value	Profit	Total ROI
2%	$10,612.08	+$612.08	+6.12%
5%	$11,576.25	+$1,576.25	+15.76%
7%	$12,250.43	+$2,250.43	+22.50%
10%	$13,310.00	+$3,310.00	+33.10%
12%	$14,049.28	+$4,049.28	+40.49%
15%closest	$15,208.75	+$5,208.75	+52.09%
20%	$17,280.00	+$7,280.00	+72.80%
25%	$19,531.25	+$9,531.25	+95.31%

Based on an initial investment of $10,000.00 over 3 years, compounded annually.

Compare Multiple Investments

Name

Invested ($)

Final Value ($)

Name

Invested ($)

Final Value ($)

Investment A+40.00%

Invested: $10,000.00Return: +$4,000.00Annualized: +11.87%

Investment B+65.00%

Invested: $10,000.00Return: +$6,500.00Annualized: +18.17%

Investment B has the highest ROI at 65.00% (18.17% annualized)

Annualized returns are calculated using the time period above (3 years).

How ROI is Calculated

Basic ROI Formula

ROI = (Final Value - Investment Cost) / Investment Cost x 100%

Annualized ROI

Annualized ROI = ((Final / Initial) ^ (1 / Years) - 1) x 100%

Accounts for compounding and allows comparison of investments with different time horizons.

Rule of 72

Years to Double = 72 / Annual Return Rate

A quick way to estimate doubling time. At 8% annual return, it takes approximately 72/8 = 9 years to double.

How to Use ROI Calculator

1Enter initial investment amount.
2Enter final value or total gain/loss.
3Set the time period in years.
4View ROI, annualized return, and time to double.

Frequently Asked Questions

How do I calculate ROI?▾

ROI = (Final Value - Initial Investment) ÷ Initial Investment × 100. E.g., invest $10,000, sell for $13,000 → ROI = 30%.

What is annualized ROI?▾

Annualized ROI adjusts the return to a per-year basis, useful for comparing investments held for different durations.

What is the Rule of 72?▾

Divide 72 by the annual return rate to estimate years to double. At 8% return, money doubles in ~9 years (72÷8=9).

About ROI Calculator

NexTool's ROI Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.