Finance Tools

Six free calculators for the money decisions most people actually run into: borrowing, paying down a mortgage, converting hourly to annual salary, seeing how compound interest builds wealth, stress-testing a retirement plan, and doing fast percentage math. Every calculation runs inside your browser, so numbers you type never leave your device.

Who these tools are for

UtilityGet's finance tools are built for the kind of quick, practical math that sits between a napkin and a full-blown spreadsheet. If you want to know what a car loan will actually cost, whether a mortgage offer beats your current one, how much of your paycheck is take-home pay, or whether your retirement savings are on track, you can get a trustworthy answer in under a minute.

There are no accounts, no uploads, and no stored profiles. That matters for finance in particular: salary numbers, debt balances, and retirement projections are sensitive, and they should stay on your device. Every tool below uses the same formulas lenders and banks use - the difference is that we show the math and let you compare scenarios side by side.

At a glance

  • 6 calculators in this hub: Loan, Mortgage, Salary, Compound Interest, Retirement, and Percentage.
  • Same formulas as the banks. The math matches what lenders and advisors use.
  • Private by default. Salary, debt, and retirement numbers never leave your browser.
  • No accounts. Nothing to sign up for, nothing to uninstall.
  • Side-by-side scenarios. Change one input to see exactly how the result shifts.

How to choose the right tool

These six calculators look similar from the outside, but they answer very different questions. Use this quick decision guide to get to the right one fast.

  • You have a specific loan offer in hand. Use the Loan Calculator. Enter principal, rate, and term to see the monthly payment and how interest and principal shift across the amortization schedule.
  • You are buying, refinancing, or comparing mortgages. Use the Mortgage Calculator. It includes property tax and insurance so your monthly estimate reflects real housing costs, not just principal and interest.
  • You want to convert a pay rate. Use the Salary Calculator to go from an hourly rate to annual pay, or to see what a monthly salary works out to per week. Useful when comparing job offers or negotiating contract rates.
  • You are saving or investing for the long term. Use the Compound Interest Calculator to model monthly contributions, expected return, and time horizon. Raise the contribution to see how much faster you hit a goal.
  • You want a realistic retirement projection. Use the Retirement Calculator. It projects your fund at retirement, applies the 4% withdrawal rule, and flags whether the balance lasts through your target age.
  • You need to do percentage math. Use the Percentage Calculator for tips, discounts, tax, markups, grade scores, percentage change, and reverse percentages.

Common use cases

A few concrete situations these tools are designed to handle.

  • Shopping for a car loan. Drop in the quoted principal and rate to check whether the monthly payment in the dealer's offer matches the numbers in the Loan Calculator. A mismatch usually means extra fees are hidden inside the financing.
  • Comparing a 15-year vs. 30-year mortgage. Run the Mortgage Calculator twice with the same principal and different terms. The 30-year is cheaper per month but often doubles total interest paid.
  • Negotiating a salary. Convert the employer's annual figure to hourly with the Salary Calculator. Compare it to your current rate and to freelance day-rates in your market.
  • Planning a savings milestone. Put your target amount, current balance, and expected return into the Compound Interest Calculator and adjust the monthly contribution until the projection hits your goal on time.
  • Sanity-checking a retirement plan. Use the Retirement Calculator with conservative and optimistic return rates. If the conservative scenario still meets your target, the plan has headroom.
  • Everyday percentage math. The Percentage Calculator handles a 20% tip, a 15% off coupon, a 7.5% sales tax, or a year-over-year revenue change in the same interface.

Related tools outside finance

Some adjacent tools on UtilityGet pair well with financial planning.

Frequently Asked Questions

Which finance calculator should I use first?
Start with the tool closest to the decision you are making. For a specific loan offer, use the Loan Calculator. For a home purchase, use the Mortgage Calculator. For long-term wealth building, use the Compound Interest or Retirement Calculator. The Salary Calculator is best for converting between pay frequencies, and the Percentage Calculator handles day-to-day math like discounts and tax.
Are these calculators accurate enough for real decisions?
They use the same amortization, compound interest, and percentage formulas that lenders, banks, and finance textbooks rely on. Results are precise for planning and comparison. For a legally binding quote you should still get a written disclosure from the lender or institution, because they may include fees, insurance, or promotional rates not entered here.
Does UtilityGet save my financial inputs?
No. Every finance tool runs entirely in your browser using JavaScript. Numbers you enter are never uploaded to a server and are cleared when you close the tab. That keeps salary, loan amounts, and retirement balances private.
Can I use these tools for any currency?
Yes. The calculations are currency-agnostic. If you enter 250000 it is treated as 250,000 units in whatever currency you are working with. Interest rates and percentages behave the same regardless of currency.
What is the difference between interest rate and APR?
The interest rate is what the lender charges on the principal. APR bundles the interest rate with most fees into a single percentage, so it reflects the true annual cost of borrowing. When comparing loan offers, APR is usually the more honest number. Our Loan Calculator and Mortgage Calculator accept an interest rate; enter the APR if you want the result to include common fees.
How do I compare a fixed-rate and variable-rate loan?
Run the Loan Calculator twice: once with the fixed rate, once with the variable rate at today's value, and optionally a third time at the worst-case rate the loan could reset to. Comparing the three monthly payments and total interest figures shows the risk premium you are taking for the lower teaser rate.