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RSI (Relative Strength Index) RSI (Relative Strength Index) is a fast, free finance calculator

Result

Calculated result 66.6666666667 Based on the values entered.
↗ Finance

RSI (Relative Strength Index) RSI (Relative Strength Index) is a fast, free finance calculator. Enter Average Gain (14-period) and Average Loss (14-period) to get an instant, accurate result — complete with the formula, a step-by-step worked example, and — free online calculator.

Formula

100-100/(1+avg_gain/avg_loss)
  • RSI (Relative Strength Index) RSI (Relative Strength Index) is a fast, free finance calculator calculates its result from Average gain, Average loss. It uses the formula 100-100/(1+avg_gain/avg_loss). Change any input to recalculate the result instantly.
  • The main inputs are Average gain, Average loss. Enter them in the units and format shown in the calculator.
  • Use monetary amounts, rates and time periods exactly as labeled; the result reflects the assumptions entered on this page.
  • Changing any input above recalculates the result with the same calculation engine used by this page.

Example: RSI (Relative Strength Index) RSI (Relative Strength Index) is a fast, free finance

Inputs
  • Average gain: 2
  • Average loss: 1

Using Average gain = 2, Average loss = 1, the calculated result is 66.6666666667.

Sample result: Calculating…

Frequently asked questions

What does the RSI (Relative Strength Index) RSI (Relative Strength Index) is a fast, free finance calculate?

RSI (Relative Strength Index) RSI (Relative Strength Index) is a fast, free finance calculator. Enter Average Gain (14-period) and Average Loss (14-period) to get an instant, accurate result — complete with the formula, a step-by-step worked example, and — free online calculator.

Which values should I enter?

Enter Average gain, Average loss using the units and format shown beside each field.

What formula does this calculator use?

The calculator uses the following relationship: 100-100/(1+avg_gain/avg_loss).

Why might my result differ from another source?

Results can differ when another source uses different units, rounding rules, conventions or assumptions. Compare the inputs and definitions before comparing results.

Does the result update automatically?

Yes. Changing an input updates the result using the same calculation engine shown on this page.

Page information

Updated: October 7, 2026