TechShield Tools

Free Calculators & Everyday Tools

Free calculators and everyday tools for money and life. Fast, accurate, and private — every calculation runs right in your browser. No sign-up, no cost.

💰 Financial Calculators

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Mortgage Calculator

Estimate your monthly home loan payment, taxes, insurance and total interest.

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Loan Calculator

Work out the monthly payment and total interest on any personal or fixed loan.

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Auto Loan Calculator

Estimate a car loan payment including down payment, trade-in and sales tax.

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Compound Interest Calculator

See how savings and investments grow over time with regular contributions.

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Savings Goal Calculator

Find out how much to save each month to hit a target by a set date.

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Inflation Calculator

See how inflation changes buying power and future prices over time.

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Debt Payoff Calculator

Compare the snowball and avalanche methods to clear your debts faster.

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Budget Calculator (50/30/20)

Split your take-home pay into needs, wants and savings with the 50/30/20 rule.

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Retirement Calculator

Project your retirement nest egg and the income it could provide.

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Credit Card Payoff Calculator

See how long it takes to clear a card — or the payment needed to hit a date.

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Rent vs Buy Calculator

Compare the true cost of renting versus buying a home over your time frame.

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Net Worth Calculator

Add up what you own and owe to find your total net worth.

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Mortgage Refinance Calculator

See your new payment, monthly savings and break-even point on a refinance.

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House Affordability Calculator

Find the home price you can afford based on income, debts and down payment.

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Financial Advisor Match Quiz

Answer four questions to see what kind of financial help fits your situation.

🧰 Everyday Tools

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Percentage Calculator

Work out percentages three ways — of a number, as a ratio, or change.

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BMI Calculator

Calculate body mass index and see your healthy weight range.

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Age Calculator

Find exact age in years, months and days — plus your next birthday.

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Tip Calculator

Calculate the tip and split the bill between any number of people.

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Discount & Sales Tax Calculator

Find the sale price after a discount, and add sales tax to the total.

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Unit Converter

Convert length, weight, temperature and volume between common units.

Simple, accurate calculators anyone can use

TechShield Tools is a growing collection of free online calculators for money and everyday life — from working out a mortgage payment or how your savings grow, to quick tools like a percentage calculator or BMI check. Each tool shows its formula and a clear breakdown so you understand the result, not just the number.

Everything is free and runs entirely in your browser, so the figures you enter never leave your device. More calculators are added regularly.