Finance Calculator

This is not a basic calculator. This is a professional, CFA-level financial tool designed for students, analysts, investors, and business owners. It solves the core equations of corporate finance and investment banking. If you need to calculate the implied interest rate on a lease, the Net Present Value of a rental property's cash flow, or the Internal Rate of Return on a startup investment, this is your tool.

The Time Value of Money (TVM) Solver

The foundational concept of finance: a dollar today is worth more than a dollar tomorrow because you can invest it and earn interest. The TVM Solver allows you to input any 4 of the 5 variables to solve for the missing 5th:

• PV (Present Value)
• FV (Future Value)
• PMT (Periodic Payment)
• I/Y (Interest Rate per Year)
• N (Number of Periods)

Whether you are solving for the monthly payment on a car loan (PV, I/Y, N ➔ PMT) or the interest rate earned on a savings bond (PV, FV, N ➔ I/Y), the solver handles it instantly.

Net Present Value (NPV) Analysis

NPV is the gold standard for investment decisions. It calculates the present value of all future cash flows (both inflows and outflows) minus the initial investment. If NPV > 0, the project is expected to generate value and should be accepted. If NPV < 0, it destroys value. Our tool accepts uneven cash flows—for example, Year 1: -$10,000 (investment), Year 2: $5,000, Year 3: $6,000, Year 4: $7,000. Input a discount rate (your cost of capital or required return). We calculate the exact NPV.

Internal Rate of Return (IRR)

IRR is the discount rate that makes the NPV of all cash flows equal to zero. It is the "break-even" rate of return for an investment. If the IRR is higher than your cost of capital, the investment is attractive. For the cash flow example above, our tool solves iteratively to find the IRR. Note: For non-conventional cash flows (alternating positive and negative), there can be multiple IRRs. Our tool warns you if this occurs and suggests using Modified IRR (MIRR).

Lease vs. Buy Analysis

Should you lease equipment (a car for business, a copier for your office) or buy it outright? Our dedicated Lease vs. Buy module compares:

• Buy Option: Purchase price, down payment, loan interest, maintenance, salvage value.
• Lease Option: Monthly lease payment, security deposit, mileage limits, end-of-lease purchase option.

The calculator outputs a Net Advantage of Leasing (NAL) or Buying (NAB) figure. Generally, buying wins for assets you keep long-term; leasing wins for assets that depreciate quickly or if you have cash flow constraints.

FAQ: Finance Calculator

Finance Calculator is optimized for fast browser-based use, so you can test multiple scenarios in seconds.