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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 with clear results.

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.

Popular picks include BMI Calculator, Equation Solver, Scientific Calculator.

BMI Calculator
Calculate your BMI using metric or imperial units. Instantly check if you are underweight, normal, overweight, or obese.
Equation Solver
Solve linear equations, quadratic equations, and 2×2 systems step by step. See exact solutions, discriminants, determinants, and worked algebra.
Scientific Calculator
Work with trig, logs, factorials, powers, hyperbolic functions, and memory features in a beautiful scientific calculator.
Derivative Calculator
Differentiate polynomial functions of x symbolically using the power rule. View f'(x), simplifications, and evaluation at a specific x value with clear, step-by-step working.
Integral Calculator
Find indefinite and definite integrals of polynomial functions in x. See the antiderivative F(x) + C and compute ∫ from a to b with clear, step-by-step explanations.
Matrix Calculator
Compute matrix addition, subtraction, multiplication, determinant, and inverse for up to 4×4 matrices. Ideal for linear algebra and system of equations checks.
Complex Number Calculator
Add, subtract, multiply, divide, and raise complex numbers to integer powers. View modulus, argument, and polar form r∠θ for fast complex arithmetic checks.
Triangle Solver
Solve any triangle from common combinations like SSS, SAS, ASA, SSA, or right triangles. Find missing sides, angles, area, and perimeter.
Area & Volume Calculator
Calculate area, perimeter, surface area, and volume for common 2D shapes and 3D solids including circles, rectangles, triangles, spheres, cylinders, cones, and rectangular prisms.
Mortgage & Loan Amortization Calculator
See mortgage or loan amortization schedules, total interest, and the impact of extra payments on your payoff time.
APR vs APY Converter
Convert between nominal APR and effective APY for different compounding frequencies such as monthly, daily, and annually.
Savings Goal Calculator
Figure out how long it will take to reach a savings goal with monthly deposits, or how much you need to save each month to hit a target in time.
Circle & Arc Calculator
Enter a circle radius and central angle to compute diameter, circumference, area, arc length, sector area, and chord length.
Projectile Motion Calculator
Enter launch speed, angle, and starting height to compute flight time, maximum height, and horizontal range for a projectile trajectory.
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 and percentage change between two values, with clear formulas and results for pricing, analytics, experiments, or homework quickly.
Factorial Calculator
Calculate the factorial of any integer n, including large values, with instant results for permutations, combinations, homework, and probability exercises.
Prime Generator
Generate a list of the first N prime numbers instantly.
Number Base Calculator
Convert numbers between binary, octal, decimal, and hexadecimal instantly, with clear base labels and copy-ready results for coding or math homework quickly.
GPA Calculator
Calculate GPA on a 4.0 scale by entering course grades and credit hours, then get instant totals for term or cumulative performance and goal tracking.
Body Fat Calculator
Estimate body fat percentage with the US Navy method using height, neck, waist, and hip measurements, then get a quick, private result for fitness tracking.
Retirement Savings
Estimate retirement savings with current balance, monthly contributions, and return rate, then see year-by-year growth and goal progress by age in clear charts.
Calories Burned
Estimate calories burned for common activities using your weight and workout duration, with MET-based results to compare workouts, goals, and weekly totals.

Calculators tools FAQ

What can I do with calculators tools?

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

How many calculators tools does ToolHop provide?

This category currently includes 32 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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