Financial

ROI Calculator

Measure return on investment, profit, and margin.

Inputs

Adjust the assumptions to match your scenario. Results update instantly.

Initial costTotal cash or capital committed at the start of the investment.Final valueValue of the position or project at the end of the period.Extra costsFees, maintenance, or other additional costs tied to the investment.

Results

Primary outputs and comparison insights are built from the current inputs.

Net profit

$1,750.00

Gain left after subtracting original and extra costs.

ROI

35%

Return on investment as a percentage of the original cost.

Profit margin

25%

Profit expressed as a share of the final value.

How this calculator works

The ROI Calculator helps you compare projects, trades, and small business decisions by showing net profit, ROI, and profit margin from the same input set. Enter initial cost, final value, and extra costs to estimate net profit, roi, and profit margin. The calculator updates instantly and adds a comparison table plus chart so you can test the sensitivity of the result before you use it in a decision.

Quick guide

Jump straight to the section you need, then return to the calculator.

Inputs Outputs Assumptions Tips Formulas Examples Reference table Visual breakdown References

Inputs

Total cash or capital committed at the start of the investment.
Value of the position or project at the end of the period.
Fees, maintenance, or other additional costs tied to the investment.

Outputs

Gain left after subtracting original and extra costs.
Return on investment as a percentage of the original cost.
Profit expressed as a share of the final value.

Assumptions

The model treats all extra costs as direct cash outflows.
Time value of money is not included in the ROI percentage.

Tips

Use the same time horizon when comparing different ROI scenarios.
A high ROI may still be weak if the absolute profit is too small.

Formula guide

Use these formulas to audit the output or explain it to someone else.

2 formulas

Net Profit = Final Value - Initial Cost - Extra Costs

ROI % = Net Profit ÷ Initial Cost × 100

Usage examples

Review a ready-made scenario, copy it, then tweak inputs to match your case.

Example

3 inputs3 outputs

Small project review

Inputs

Example input Initial cost: $8,000.00
Example input Final value: $11,000.00
Example input Extra costs: $500.00

Outputs

Example result Net profit: $2,500.00
Example result ROI: 31.25%
Example result Profit margin: 22.73%

ROI is best used as a comparison metric alongside time, risk, and the cash needed to earn that return.

ROI by exit value

4 of 4 rows

Final value	Net profit	ROI
$5,250.00	$0.00	0%
$7,000.00	$1,750.00	35%
$8,750.00	$3,500.00	70%
$10,500.00	$5,250.00	105%

ROI depends heavily on the exit value, so test realistic best-case and base-case outcomes instead of a single number.

ROI sensitivity

Highest: $10,500.00 (105%)Lowest: $5,250.00 (0%)

Sort

Final valueROI

Focus point

$5,250.00

Position

#1 of 4

Original order

Share of total

Total: 210%

PositiveNegative

ROI depends heavily on the exit value, so test realistic best-case and base-case outcomes instead of a single number.

References

ROI formulas used in project and investment analysis
Basic profitability and margin calculations

FAQ

Common questions

What does the ROI Calculator do?

What inputs do I need?

Typical inputs include Total cash or capital committed at the start of the investment., Value of the position or project at the end of the period., Fees, maintenance, or other additional costs tied to the investment..

How are the results calculated?

We follow the formulas and assumptions outlined in the "How this calculator works" section. You will see outputs like Gain left after subtracting original and extra costs., Return on investment as a percentage of the original cost., Profit expressed as a share of the final value..