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46 free tools · no sign-up

Free Calculators Tools

Work through loans, percentages, taxes, tips, dates, health metrics, and everyday money decisions.

Everyday decisions often need a quick, transparent calculation rather than a spreadsheet. These calculators cover borrowing, saving, percentages, tips, dates, health, and business costs, with the inputs and result shown clearly. Check the assumptions, adjust the numbers, and use the result as a starting point for your own decision.

SIP Calculator

Project mutual fund SIP returns with monthly investments and step-ups.

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Loan Calculator

Calculate monthly payments, total interest, and payoff for any loan.

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Savings Goal Calculator

Find how long or how much to save to reach a target amount.

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Retirement Calculator

Project your nest egg and monthly retirement income.

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Inflation Calculator

See how inflation changes the value of money over time.

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VAT / GST Calculator

Add or remove VAT and GST from prices with clear breakdowns.

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Discount Calculator

Calculate sale price, savings, and the original price after a discount.

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ROI Calculator

Measure return on investment and annualized performance.

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Break-Even Calculator

Find the units and revenue needed to cover your costs.

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Credit Card Payoff Calculator

Estimate payoff time and interest for a credit card balance.

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Scientific Calculator

A full-function scientific calculator with history and keyboard input.

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Fraction Calculator

Add, subtract, multiply, and divide fractions with steps.

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Average, Median & Mode Calculator

Calculate mean, median, mode, range, and totals from a list.

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Standard Deviation Calculator

Calculate population and sample standard deviation with working.

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Prime Number Checker & Factorizer

Test primality and find prime factors of any number.

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LCM & GCF Calculator

Find the least common multiple and greatest common factor with steps.

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Profit Margin Calculator

Calculate gross margin, net margin, markup, and profit.

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Sales Tax Calculator

Add or remove sales tax and see the tax breakdown.

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Net Worth Calculator

Add assets and liabilities to calculate your net worth.

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Loan Comparison Calculator

Compare monthly payments and total interest across multiple loans.

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Commission Calculator

Calculate sales commission from revenue and commission rate.

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Scientific Notation Converter

Convert numbers to and from scientific notation.

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Quadratic Equation Solver

Solve quadratic equations with steps and imaginary roots.

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Pythagorean Theorem Calculator

Find a missing triangle side using the Pythagorean theorem.

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Triangle Calculator

Solve triangle sides, angles, area, and perimeter.

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Circle Calculator

Calculate radius, diameter, circumference, and area.

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Unit Price Calculator

Compare products by price per unit, ounce, gram, or liter.

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EMI Calculator

Work out your monthly loan instalment, total interest, and total repayment in seconds.

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Compound Interest Calculator

See how your savings grow over time with the power of compounding.

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Mortgage Calculator

Estimate your full monthly home payment, including taxes, insurance, HOA, and PMI.

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BMI Calculator

Check your body mass index in metric or imperial units and see your healthy weight range.

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Daily Calorie Calculator

Find your maintenance calories and a sensible target for losing, maintaining, or gaining weight.

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Percentage Calculator

Solve “X% of Y”, percentage increase, decrease, and discount questions instantly.

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Hourly to Salary Calculator

Convert an hourly wage into weekly, monthly, and annual salary—or work backwards.

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Margin & Markup Calculator

Calculate profit, margin, and markup from cost and selling price.

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Tip Calculator

Work out the tip, total bill, and amount per person for any group size.

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Aspect Ratio Calculator

Find the ratio of any width and height, or calculate a missing dimension.

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Pregnancy Due Date Calculator

Estimate your due date and current trimester from your last period.

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Payment Gateway Fee Calculator

See exactly what Stripe, PayPal, and other payment processors take from a transaction.

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Paycheck & Tax Calculator

Estimate take-home pay from gross salary using federal tax brackets and FICA.

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Pizza Party Calculator

Work out how many pizzas to order for adults, children, and serious appetites.

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Roofing & Flooring Calculator

Estimate tiles, shingles, or flooring packs from room dimensions and waste.

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Fuel Cost Calculator

Estimate the fuel cost of a road trip from distance, efficiency, and gas price.

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Auto Loan Payment Calculator

Calculate your monthly car payment from price, down payment, trade-in, and rate.

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Amortization Schedule Generator

See a month-by-month breakdown of principal, interest, and remaining balance.

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Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals back to numbers.

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