What is a finance (TVM) calculator?

A time-value-of-money (TVM) calculator lets you solve for any one variable - payment, amount, rate, term or future value - when you know the others, using the same math behind professional financial calculators.

How do I find the interest rate on a loan?

Enter the loan amount, your monthly payment and the term, then set 'Solve for' to Interest Rate. The calculator finds the rate that matches your payment.

Finance (TVM) Calculator

Pick the variable you want to solve for, then enter the rest.

Time Value of Money

Solve For

Loan Amount ($)

Interest Rate (% p.a.)

Term (years)

yrs

Monthly Payment ($)

Target Future Value ($)

Monthly Payment

—

Total Payments

—

Total Interest

—

How the finance calculator works

This is a time-value-of-money (TVM) engine. Choose what to solve for, fill in the other four values, and it computes the missing one using standard amortization math — the same logic used in professional financial calculators.

Finance Calculator FAQ

How can I find how long a loan takes to pay off?▶

Set 'Solve For' to Loan Term and enter the amount, rate and the payment you can afford. The result shows the number of years that payment will take.

What is the difference between amount and future value?▶

Loan Amount is the principal today. Future Value is what a series of payments grows to at the given rate — useful for savings targets.

TVM: Time value of money

Solve: Payment / amount / future / term / rate

5 variables: PV, FV, rate, payment, term

Use: Loans and investments

Finance Calculator — the time value of money, solved

This professional TVM (Time Value of Money) calculator solves for any one of five variables — monthly payment, loan amount, future value, term or interest rate — given the other four. The same tool powers your mortgage, savings goal and annuity planning.

The five TVM variables

PV (present value), FV (future value), PMT (periodic payment), rate and term are linked by one equation. Give four, solve the fifth.

Solving for payment: how much monthly EMI? Solving for amount: how big a loan? Solving for term: how long to pay off? Solving for rate: what yield does this investment deliver?

This is the same engine inside Excel's PMT, PV, FV, NPER and RATE functions — giving you spreadsheet-grade accuracy in the browser.

Practical uses

Compare a 15 vs 30 year loan by solving for payment at the same rate.

Find how many years until a goal amount at a given SIP — instant NPER.

Reverse-engineer the hidden interest rate on any 'easy EMI' scheme — many are far costlier than they appear.

How to use this calculator

Select the variable to solve for (payment, amount, future, term or rate).
Enter the four known variables.
Read the solved variable instantly.
Switch the 'solve for' selection to answer different questions on the same inputs.

Pro tips

Use 'solve for rate' before signing any buy-now-pay-later or EMI plan.
Use 'solve for term' to see the true payoff years with extra payments.
Remember: negative cash flows (payments) vs positive (receipts) keep signs consistent when doing TVM by hand.

Frequently asked questions

What is time value of money?▶

A dollar today is worth more than a dollar tomorrow because it can earn interest. TVM accounts for this when comparing cash flows at different points in time.

What is the annuity formula?▶

Payment = P × r ÷ [1 − (1+r)^−n], where r is the periodic rate and n the number of periods. This is the formula behind equal monthly payments on a loan.

Finance Calculator