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NPV Calculator | Calculate NPV From Cash Flows and Discount Rate

Calculate net present value and profitability index from a series of future cash flows and a discount rate, with each discounted term shown. The essential tool for evaluating investments, projects and business decisions.

Last updated: June 2026 · Free · No sign-up required

Results

Enter values above and click Calculate to see your result instantly.

Inside the Npv Calculator Online

Every result on this page comes from a real formula — NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n — computed live in your browser the moment you press the button.

The reference table below covers the most common npv calculator cases at a glance, the methodology section breaks the calculation into verifiable steps, and the FAQ tackles the edge cases.

Quick reference

Cash flows @10%NPV
−1000, 300, 400, 500−$21.04
−1000, 400, 400, 400−$5.26
−1000, 500, 500, 500+$243.43
−5000, 2000, 2000, 2000, 2000+$1,339.73

info Npv Calculator Online

Free math calculator — enter your numbers and get an instant, accurate result.

info Private by design

Everything runs locally in your browser. No uploads, no accounts, no tracking.

info Works everywhere

Fully responsive and mobile-friendly — calculate on any device, any time.

info Educational

Includes the formula and step-by-step explanation so you understand the math, not just the answer.

Interpretation guide

NPVDecision rule
> 0Accept — creates value above the hurdle rate
= 0Break-even — earns exactly the discount rate
< 0Reject — destroys value at this rate

lightbulb Worked example

Let's say you are using the Npv Calculator Online. Calculates npv using NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n, in real time in your browser. Enter the values that match your situation into the input fields and press calculate — using realistic numbers makes the result directly useful for you.

Result: The calculator instantly applies the formula NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n and returns the result with appropriate precision.

What this means: Read the result in the context of what you are measuring. The step-by-step breakdown lets you confirm the math and understand which input most affects the outcome.

Formula & methodology

Formula: NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n

The Npv Calculator Online is built on a well-established calculation method. It uses the formula NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n to turn your inputs into a reliable result. Calculates npv using NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n, in real time in your browser. The steps are shown on the page so you can follow the reasoning from input to output.

  1. Enter your discount rate (cost of capital or required return) in percent.
  2. List the cash flows starting with year 0 — the initial investment as a negative number — then each year’s net inflow.
  3. The tool discounts each flow by (1+r)ᵗ and sums them; the profitability index divides the PV of inflows by the investment.

Example: −$1,000 then $300/$400/$500 at 10% → NPV = −$21.04 — marginally value-destroying despite $1,200 of nominal inflows.

Authoritative source: Wolfram MathWorld

Frequently asked questions

What is net present value?
The Npv Calculator Online is free, private, and accurate: it runs entirely in your browser (no uploads, no accounts), applies the standard calculation, and explains each step so you can verify the result. Calculates npv using NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n, in real time in your browser. There is no limit on usage, and it works on any device.
How do I enter the cash flows?
Enter the required values into the input fields and press the calculate button. The tool applies the formula NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n and returns the result with a short explanation of each step, so you can check the working yourself.
What discount rate should I use?
Use the opportunity cost of capital — the return you could earn on an equally risky investment, often approximated by the company's weighted average cost of capital or a market benchmark plus a risk premium. A higher discount rate lowers NPV because future cash flows are worth less today. Testing a range of rates (sensitivity analysis) is standard practice before deciding.
Why is my NPV negative when total inflows exceed the investment?
Because NPV discounts future cash flows to present value, and money received later is worth less than money now. If the inflows are far in the future or the discount rate is high, their present value can fall below the initial investment even when the undiscounted sum is larger. NPV answers 'is this project worth more than investing the money elsewhere', not 'do inflows exceed outflows'.
What is the profitability index?
The profitability index is the ratio of the present value of future cash flows to the initial investment: PI = PV of inflows ÷ initial outlay. A PI above 1 means the project creates value, and it ranks projects by value created per dollar invested — useful when capital is limited and projects compete. NPV gives the absolute value, PI gives the efficiency.
What does the Npv Calculator Online do?
Calculates npv using NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n, in real time in your browser. The calculator takes your inputs, applies the standard calculation, and returns a clear result so you can make an informed decision without doing the math by hand.
What formula does the Npv Calculator Online use?
The Npv Calculator Online uses the standard NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n. You enter your values, and the calculator applies the formula step by step, showing the working so you can verify the math and understand how the result is derived rather than trusting a black box.
Is the Npv Calculator Online free and private?
Yes — the Npv Calculator Online. There is no sign-up, no paywall, no trial, and no limit on how many calculations you can run. CalcaTools covers its costs with non-intrusive display advertising, so the calculator itself never asks for payment or restricts any feature.
How accurate is the Npv Calculator Online?
The Npv Calculator Online applies the standard formula: NPV = Σ CFₜ ÷ (1 + r)ᵗ, t = 0 … n. It is tested against published worked examples before launch and uses native double-precision arithmetic, so results are accurate to typical precision for the values you enter — with no intermediate rounding that could distort the answer.

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