Calculate gain or loss and ROI from an initial investment and a final value.
Calculate monthly payment, total payment and total interest from principal, rate and term.
Open →Calculate the loan amount and monthly principal and interest from price, down payment, rate and term.
Open →Enter principal, rate, duration, and compound frequency, with an optional regular contribution, to calculate the ending balance and interest earned
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Enter the initial investment and final value to get the gain or loss and the ROI percentage. Losses are shown as a negative ROI.
Yes — on a loss, ROI displays as a negative percentage, and the loss amount is highlighted in red rather than hidden or clamped to zero.
The tool shows a clear error — the ROI formula divides by the initial investment, so 0 would be a divide-by-zero and cannot produce a meaningful ROI.
Not by default — it only uses initial investment and final value to keep the UI simple. To include fees, subtract them from the final value yourself before entering it.
Results are estimates based on the values entered.
