Math Tools

From percentages to complex numbers — accurate, instant math calculators for students, teachers and professionals.

83 free tools · everything runs in your browser

Rectangle Area Calculator

Compute the area, perimeter and diagonal of any rectangle instantly.

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Prime Number Calculator

Check primality, find factors, prime factorization, divisors and the next prime.

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QR Decomposition Calculator

Decompose a matrix into orthogonal Q and upper triangular R matrices.

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Jacobian Matrix Calculator

Compute the Jacobian matrix of multivariable functions at a given point.

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Convolution Calculator

Compute the discrete convolution of two sequences for signal processing.

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Orthogonal Projection Calculator

Project a vector onto a subspace spanned by basis vectors.

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Inverse Modulo Calculator

Find the modular multiplicative inverse of a number modulo m.

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Simpson's Rule Calculator

Approximate definite integrals numerically using Simpson's Rule.

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Fibonacci Sequence Calculator

Generate the first N Fibonacci numbers instantly.

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Matrix Subtraction Calculator

Subtract one matrix from another element by element.

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Matrix Transpose Calculator

Transpose any matrix — swap rows and columns instantly.

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Age Calculator

Free online Age Calculator tool.

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Algebra Solver

Free online Algebra Solver tool.

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Attendance Percentage Calculator

Free online Attendance Percentage Calculator tool.

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Basic Calculator

Free online Basic Calculator tool.

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Bmi Calculator

Free online Bmi Calculator tool.

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Bmr Calculator

Free online Bmr Calculator tool.

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Body Fat Calculator

Free online Body Fat Calculator tool.

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Break Even Calculator

Free online Break Even Calculator tool.

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Budget Calculator

Free online Budget Calculator tool.

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Calorie Calculator

Free online Calorie Calculator tool.

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Cgpa To Percentage Calculator

Free online Cgpa To Percentage Calculator tool.

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College Gpa Calculator

Free online College Gpa Calculator tool.

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Compound Interest Calculator

Free online Compound Interest Calculator tool.

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Countdown Calculator

Free online Countdown Calculator tool.

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Date Calculator

Free online Date Calculator tool.

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Discount Calculator

Free online Discount Calculator tool.

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Emi Calculator

Free online Emi Calculator tool.

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Fd Rd Calculator

Free online Fd Rd Calculator tool.

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Fraction Calculator

Free online Fraction Calculator tool.

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Fuel Cost Calculator

Free online Fuel Cost Calculator tool.

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Gpa Cgpa Calculator

Free online Gpa Cgpa Calculator tool.

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Grade Calculator

Free online Grade Calculator tool.

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Graphing Calculator

Free online Graphing Calculator tool.

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Gst Calculator

Free online Gst Calculator tool.

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Gst Vat Calculator

Free online Gst Vat Calculator tool.

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Keyword Cpc Calculator

Free online Keyword Cpc Calculator tool.

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Loan Amortization Calculator

Free online Loan Amortization Calculator tool.

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Loan Emi Calculator

Free online Loan Emi Calculator tool.

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Mileage Calculator

Free online Mileage Calculator tool.

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Mortgage Calculator

Free online Mortgage Calculator tool.

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Payment Reminder Generator

Free online Payment Reminder Generator tool.

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Profit Margin Calculator

Free online Profit Margin Calculator tool.

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Ratio Calculator

Free online Ratio Calculator tool.

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Retirement Calculator

Free online Retirement Calculator tool.

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Roi Calculator

Free online Roi Calculator tool.

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Scientific Calculator

Free online Scientific Calculator tool.

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Scientific Unit Converter

Free online Scientific Unit Converter tool.

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Sip Calculator

Free online Sip Calculator tool.

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Study Time Calculator

Free online Study Time Calculator tool.

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Tax Calculator

Free online Tax Calculator tool.

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Travel Time Calculator

Free online Travel Time Calculator tool.

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Weather Heat Index Calculator

Free online Weather Heat Index Calculator tool.

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Weight Calculator

Free online Weight Calculator tool.

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Salary Calculator

Calculate net salary after deductions. Convert between hourly, monthly, and annual salary.

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Freelance Rate Calculator

Calculate your ideal freelance hourly rate based on expenses and income goals.

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Project Cost Estimator

Estimate project costs based on resources, time, and expenses. Plan budgets effectively.

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SaaS Pricing Calculator

Calculate SaaS pricing for your software product. Plan subscription tiers.

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Life Expectancy Calculator

Estimate life expectancy based on lifestyle factors. For informational purposes.

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Recipe Calculator

Scale recipes up or down. Adjust ingredient quantities.

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Calorie Counter

Track daily calorie intake. Monitor your nutrition.

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Degree Day Calculator

Calculate heating and cooling degree days from daily temperature logs with adjustable base temperature.

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Tax Saver Planner

Estimate income tax saved under India's 80C, 80D and HRA deductions with a clear slab-wise breakdown.

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Inflation Calculator

See what today's money is worth in the past or future at any annual inflation rate.

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NPS Calculator

Project your NPS corpus with monthly contributions, expected returns and annuity split at age 60.

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DCF Valuator

Discounted cash flow valuation: present value of projected free cash flows plus terminal value.

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Pregnancy Due Date Calculator

Estimated due date from your last menstrual period with week-by-week trimester milestones.

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Ideal Weight Calculator

Healthy weight range for your height and frame using the Devine, Robinson, Miller and Hamwi formulas.

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Macro Calculator

Daily protein, carb and fat targets from your calories, body goal and activity level.

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TDEE Calculator

Total daily energy expenditure via the Mifflin-St Jeor equation with activity multiplier and cut/bulk targets.

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Statistics Calculator

Paste numbers to get mean, median, mode, variance, standard deviation and percentiles.

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Probability Calculator

Calculate probabilities for dice, coins, cards and combinations with step-by-step formulas.

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Set Operations Calculator

Union, intersection, difference and symmetric difference of two sets with a Venn diagram preview.

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Variance Calculator

Compute mean, variance and standard deviation for population or sample data with a step-by-step formula breakdown.

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Weighted Average Calculator

Enter value-weight pairs and get the weighted average instantly, with a simple-average comparison.

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Exponential Growth Calculator

Project growth or decay from an initial value, rate and time — doubling time, rule of 72 and a year-by-year table.

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Remainder Calculator

Divide two integers and get the quotient, remainder and the full a = b × q + r equation.

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Factorial Calculator

Compute n! exactly with BigInt, trailing zeros, prime-factor breakdown and a Stirling approximation.

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Complex Number Calculator

Add, subtract, multiply, divide and find modulus, argument, conjugate, powers and roots of complex numbers.

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Trigonometry Calculator

Get sin, cos, tan and their inverses for any angle, plus a right-triangle solver from an angle and a side.

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GPA to Letter Grade Converter

Convert percentage grades to letter grades and 4.0-scale GPA points, and back, on the standard US scale.

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Watts Amps Volts Calculator

Solve AC power problems: from voltage, current and power factor get kW, kVA, HP and BTU/h for single or three-phase circuits.

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Voltage Divider Calculator

Get output voltage, current and per-resistor power from Vin and two resistors, with formula and ratio breakdown.

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