✦ 100% Free · Fast · Easy to Use

Free Online Calculators for Money, Health, Math & Everyday Life

Quick, accurate calculators for loans, health, maths and everyday money questions. No complicated setup — just choose a calculator and get your answer.

✓ Free forever ✓ No sign-up ✓ Your numbers are never stored

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Financial

Mortgage CalculatorWork out monthly mortgage payments, total interest and the full cost of a home.Loan CalculatorFind the monthly payment and total interest for any loan.Auto Loan CalculatorPrice a car loan with down payment, trade-in, tax and fees included.Interest CalculatorGet a quick simple-interest estimate from an amount, a rate and a time.Payment CalculatorSee how long a credit-card balance takes to clear and what it costs.Retirement CalculatorProject your retirement savings from contributions and growth.Amortization CalculatorSee a loan paid off year by year: interest, principal and balance.Investment CalculatorProject how an investment grows with monthly contributions.Inflation CalculatorSee what today's prices may cost in future — and what cash will buy.Finance CalculatorTime value of money: solve for present value, future value, payment or time.Income Tax CalculatorEstimate 2025 US federal income tax from your salary.Compound Interest CalculatorSee how savings grow when interest starts earning interest too.Salary CalculatorTurn an hourly wage into a salary — and back — with pay breakdowns.Interest Rate CalculatorWork out a loan's interest rate from its payment and term.Sales Tax CalculatorAdd sales tax to a price, or work back to the price before tax.

Fitness & Health

BMI CalculatorCheck your body mass index and the healthy weight range for your height.Calorie CalculatorEstimate daily calories to lose, maintain or gain weight.Body Fat CalculatorEstimate body fat percentage with the US Navy tape-measure method.BMR CalculatorFind your basal metabolic rate and daily calorie needs by activity.Ideal Weight CalculatorSee the Devine ideal weight and the healthy BMI range for your height.Pace CalculatorConvert race times into pace and speed, or predict a finish time.Pregnancy CalculatorEstimate your due date and key dates from your last period.Pregnancy Conception CalculatorCount back from a due date to the likely conception date and window.Due Date CalculatorWork out a due date from a last period or a conception date.

Math

Scientific CalculatorA keypad calculator with trig, logs, powers and brackets.Fraction CalculatorAdd, subtract, multiply and divide fractions, fully simplified.Percentage CalculatorSolve percent-of, percent-change and share-of-a-total problems in seconds.Random Number GeneratorPick secure random numbers in any range, with or without repeats.Triangle CalculatorArea, perimeter and triangle type from three side lengths.Standard Deviation CalculatorMean, median and standard deviation for any list of numbers.

Other

Age CalculatorFind an exact age in years, months and days from a date of birth.Date CalculatorCount the days between two dates, or add days to a date.Time CalculatorAdd or subtract hours, minutes and seconds.Hours CalculatorWork out hours worked from start, end and break times.GPA CalculatorCalculate your GPA from course grades and credits on the 4.0 scale.Grade CalculatorFind the final exam score you need for the grade you want.Concrete CalculatorCubic yards and bag counts for a concrete slab.Subnet CalculatorNetwork, broadcast and host ranges from an IP address and CIDR.Password GeneratorCreate strong random passwords with the characters you choose.Conversion CalculatorConvert length, weight, temperature, area, volume, speed and time.Tip CalculatorWork out the tip and split the bill fairly between friends.

Choose Your Category

Pick a category to jump straight to the calculators you need.

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Financial Calculators

Mortgages, loans, savings, tax and salary.

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❤️

Fitness & Health Calculators

BMI, calories, body fat, BMR and more.

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Math Calculators

Percentages, fractions, scientific and statistics.

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Other Calculators

Age, dates, GPA, conversions and handy tools.

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Featured Calculators

Open any calculator below and start instantly.

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Mortgage Calculator

Work out monthly payments and total interest.

💳

Loan Calculator

Monthly payment and total cost of any loan.

⚖️

BMI Calculator

Check your body mass index in seconds.

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Calorie Calculator

Daily calories to lose, maintain or gain.

Percentage Calculator

Percent of, percent change and shares.

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Compound Interest Calculator

See how your savings grow over time.

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Fast & Free

Instant results in your browser, always free.

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Private by Design

The numbers you enter are used only for your result and are never stored.

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Honest Maths

Standard formulas, with a plain-English ‘How it works’ note on every calculator.

Frequently Asked Questions

Are the calculators really free?

Yes. Every calculator on AtoZ Savings is free to use, with no sign-up and no limits.

Do I need to create an account?

No. There are no accounts on AtoZ Savings — just open a calculator and use it.

Are the numbers I enter stored?

No. Your inputs are used only to calculate your result during your visit and are not stored or shared.

How accurate are the results?

Each calculator uses the standard formula for its job and shows its working, but results are estimates — for big financial or health decisions, confirm with a professional.

⚡ Save Time, Calculate Smarter

Keep every everyday calculator together in one fast, free place.