Finance
Finance Calculators
Use 24 clear, free tools to compare borrowing costs, plan savings and investments, understand taxes, and handle everyday money questions.
Curated starting points
Featured Finance Calculators
Start with the Loan Calculator for general fixed-rate borrowing, the Mortgage Calculator for home purchase principal and interest, or the APR Calculator when comparing fees. Savings and growth tools — Compound Interest, Savings, and Retirement — help sketch contribution plans. Broader explainers live in Insights.
Loan Calculator
Estimate the monthly payment, total repayment, and total interest for a fixed-rate amortizing loan from principal, annual rate, and term in years.
Open calculator →FinanceMortgage Calculator
Estimate principal-and-interest payments and total interest for a fixed-rate home loan from purchase price, down payment, rate, and term.
Open calculator →FinanceAPR Calculator
Estimate an effective annual percentage rate when upfront loan fees reduce the cash you actually receive.
Open calculator →FinanceCompound Interest Calculator
Project compound growth with an initial principal, a fixed rate, and ordinary end-of-period contributions at a chosen compounding frequency.
Open calculator →FinanceSavings Calculator
Estimate a savings balance with monthly compounding and regular end-of-month deposits from a starting balance, deposit amount, rate, and years.
Open calculator →FinanceROI Calculator
Calculate net profit and simple return on investment, including optional additional costs.
Open calculator →Browse by purpose
Finance calculator groups
Loans
Investing
Taxes
Business
Savings
Personal Finance
Salary & Employment
Registry order
Recently Added Calculators
A deterministic view of the latest entries in the current calculator registry.
Rule of 72 Calculator
Estimate years for an investment to double using the Rule of 72.
Open calculator →FinancePresent Value Calculator
Discount a future lump sum to today's present value at a constant rate.
Open calculator →FinanceOvertime Pay Calculator
Calculate regular pay, overtime pay, and total pay for a pay period.
Open calculator →FinanceSalary to Hourly Calculator
Convert an annual salary into equivalent hourly and weekly pay.
Open calculator →Complete directory
All Finance Calculators
All 24 published Finance calculators, listed alphabetically and searchable from the page introduction.
APR Calculator
Estimate an effective annual percentage rate when upfront loan fees reduce the cash you actually receive.
Open calculator →FinanceCompound Interest Calculator
Project compound growth with an initial principal, a fixed rate, and ordinary end-of-period contributions at a chosen compounding frequency.
Open calculator →FinanceCredit Card Interest Calculator
Project how a credit-card balance grows when unpaid interest compounds monthly.
Open calculator →FinanceDebt Payoff Calculator
Estimate how long it takes to pay off a revolving balance with fixed monthly payments.
Open calculator →FinanceDiscount Calculator
Calculate a discount, the reduced price, and optional tax applied after the discount.
Open calculator →FinanceEmergency Fund Calculator
Estimate the emergency fund you need, your current coverage, and the monthly saving required to reach the goal.
Open calculator →FinanceHourly to Salary Calculator
Convert an hourly wage into annual and monthly salary equivalents.
Open calculator →FinanceInflation Calculator
Estimate future cost and eroded purchasing power under a constant inflation rate.
Open calculator →FinanceInvestment Growth Calculator
Project long-term investment growth with recurring contributions at a selected frequency.
Open calculator →FinanceLoan Calculator
Estimate the monthly payment, total repayment, and total interest for a fixed-rate amortizing loan from principal, annual rate, and term in years.
Open calculator →FinanceMortgage Calculator
Estimate principal-and-interest payments and total interest for a fixed-rate home loan from purchase price, down payment, rate, and term.
Open calculator →FinanceNet Worth Calculator
Calculate net worth as total assets minus total liabilities.
Open calculator →FinanceOvertime Pay Calculator
Calculate regular pay, overtime pay, and total pay for a pay period.
Open calculator →FinancePaycheck Calculator
Estimate net pay after a flat tax rate and other deductions.
Open calculator →FinancePresent Value Calculator
Discount a future lump sum to today's present value at a constant rate.
Open calculator →FinanceRefinance Calculator
Compare current and refinanced loan payments and estimate closing-cost break-even.
Open calculator →FinanceRetirement Calculator
Project a retirement savings balance from current savings, monthly contributions, and an assumed return.
Open calculator →FinanceROI Calculator
Calculate net profit and simple return on investment, including optional additional costs.
Open calculator →FinanceRule of 72 Calculator
Estimate years for an investment to double using the Rule of 72.
Open calculator →FinanceSalary to Hourly Calculator
Convert an annual salary into equivalent hourly and weekly pay.
Open calculator →FinanceSavings Calculator
Estimate a savings balance with monthly compounding and regular end-of-month deposits from a starting balance, deposit amount, rate, and years.
Open calculator →FinanceSimple Interest Calculator
Calculate simple interest and the total amount owed or earned over a fixed term.
Open calculator →FinanceTip Calculator
Calculate a tip, total bill, and equal per-person split.
Open calculator →FinanceVAT Calculator
Add VAT to a net amount or remove VAT from a tax-inclusive gross amount.
Open calculator →What is a Finance Calculator?
A finance calculator turns a set of money assumptions into a consistent estimate. ONULSURI tools cover borrowing costs, savings and investment projections, tax/VAT helpers, and everyday money math so you can compare scenarios before talking to a provider.
When should you use one?
Use one while comparing loan offers, sizing a savings goal, checking how a rate or term changes payments, or translating hourly and salary figures. Change one assumption at a time so you can see which inputs matter most.
How calculations work
Each tool validates entries and applies a documented formula for its purpose. Results use only the values you provide; they do not pull private account data or predict future market rates. Full precision is kept until display rounding.
Limitations
Estimates simplify real products. Lender fees, escrow, taxes, compounding conventions, promotional APRs, and market returns can change outcomes. Confirm material decisions with the relevant institution or a qualified professional.
Frequently asked questions
Are these finance calculators free to use?
Yes. Every calculator on this page is free and does not require an account.
Which calculator should I use for a home loan?
Use the Mortgage Calculator for a home purchase estimate. The Loan Calculator is better for general fixed-rate borrowing.
What is the difference between interest rate and APR?
An interest rate describes borrowing interest, while APR can also reflect eligible upfront borrowing costs. The APR Calculator helps compare the broader cost.
Can I use these results for financial advice?
No. Results are planning estimates based on your inputs and should not replace advice from a qualified professional.
Do investment calculators predict market returns?
No. They project outcomes from an assumed constant return. Actual returns can vary and investments can lose value.
Why might a lender or bank show a different result?
Providers may use different payment dates, compounding rules, fees, taxes, rounding methods, or eligibility requirements.
Can I compare different scenarios?
Yes. Change one assumption at a time, such as the rate, term, contribution, or cost, to see how it affects the estimate.
Are taxes and fees always included?
Only when a calculator explicitly asks for them. Check each calculator's explanation and limitations before relying on a result.