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Calculators Tools

Free online calculators for everyday and professional use. Quickly work out BMI, percentages, loans, tips, age, compound interest, and more.

Inside the Calculators toolkit

Discover fast, browser-based utilities curated for calculators workflows. Launch any tool to start using it immediately—no downloads, no sign-up, and results you can copy or export for your projects.

BMI Calculator

Calculate your BMI using metric or imperial units. Instantly check if you are underweight, normal, overweight, or obese.

Scientific Calculator

Work with trig, logs, factorials, powers, hyperbolic functions, and memory features in a beautiful scientific calculator.

Freelance Hourly Rate Calculator

Calculate the hourly and day rate you need to hit your freelance income goals. Factor in expenses, billable hours, and profit margins.

Age Calculator

Enter your date of birth to calculate your exact age in years, months, and days. Quick, simple, and accurate.

Pet Age Calculator

Convert between human and pet years instantly. Estimate the age of dogs, cats, rabbits, horses, parrots, and more using quick reference multipliers.

Tip Calculator

Work out tips quickly and split bills between people. Enter amount, tip %, and people to see per-person cost.

UK VAT Calculator

Calculate UK VAT at 20%. Add VAT to a net price or remove VAT from a gross price instantly.

Loan Calculator

Calculate loan repayments, monthly interest, and amortization schedules. Useful for mortgages and personal loans.

Compound Interest

Calculate compound interest on savings or investments. Choose compounding frequency and growth duration.

Fraction Calculator

Work with fractions effortlessly. Simplify, add, subtract, multiply, divide, and convert to decimals in one clean workspace.

Percentage Calculator

Calculate percentages easily. Find X% of Y, percentage increase or decrease, and reverse percentage problems.

Prime Number Checker

Enter a number to check if it’s prime using a fast trial-division test.

Percentage Difference

Calculate the absolute change and percent change from one value to another.

Factorial Calculator

Calculate the factorial of any integer n with large number support.

Prime Generator

Generate a list of the first N prime numbers instantly.

Number Base Calculator

Convert numbers between binary, octal, decimal, and hexadecimal instantly.

GPA Calculator

Calculate your GPA on a 4.0 scale with credits. Add courses and see GPA instantly.

Body Fat Calculator

Estimate body fat percentage using height, neck, waist (and hip). Quick, offline.

Retirement Savings

Project retirement savings with monthly contributions and return rates over time.

Calories Burned

Estimate calories burned for common activities using your weight and duration.

Calculators tools FAQ

What can I do with calculators tools?

Use this toolkit to handle common calculators workflows such as bmi calculator, scientific calculator, freelance hourly rate calculator. Each utility opens instantly in your browser—no installs or accounts required.

How many calculators tools does ToolHop provide?

This category currently includes 20 dedicated calculators utilities with descriptive guides and shareable deep links. We expand the collection whenever we release new helpers for this workflow.

Can I bookmark or share these calculators tools?

Yes. Each tool page has a unique URL so you can bookmark frequently used calculators and send teammates directly to the interface they need.

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