Free Online Calculators for Everything
Fast, accurate, and beautifully designed tools for loans, interest, health, mathematics, and everyday conversions. No signup required.
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Popular Calculators
Tile Calculator
Work out how many tiles and boxes a floor or wall needs, counting grout joints and wastage.
Paint Calculator
Work out how much paint a room needs, with doors and windows subtracted and coats accounted for.
Canadian GST/HST Calculator
Add or remove GST, HST, PST, RST and QST for every Canadian province and territory.
UK Corporation Tax Calculator
Calculate your UK corporation tax liability including marginal relief.
Rental Income Tax Calculator UK
Calculate your UK rental income tax liability, including property allowance vs actual expenses comparison.
UK Marriage Allowance Calculator
See if you can save up to £252 a year by transferring part of your Personal Allowance to your partner.
UK Company Car Tax Calculator
Calculate your company car tax liability (BiK) for the current UK tax year.
Self Employed Tax Calculator UK
Calculate your Income Tax, Class 4 National Insurance, and Payments on Account for the 2026/2027 tax year.
Child Benefit Charge Calculator
Calculate the High Income Child Benefit Charge based on your adjusted net income.
UK Pension Tax Relief Calculator
Calculate tax relief on pension contributions in the UK.
UK Holiday Entitlement Calculator
Calculate statutory holiday entitlement in the UK.
Redundancy Pay Calculator UK
Calculate UK statutory redundancy pay based on age, weekly pay, and years of service.
VAT Calculator UK
Calculate UK Value Added Tax (VAT) to add to or extract from a price.
National Insurance Calculator (UK)
Calculate your UK National Insurance contributions for employed (Class 1) and self-employed (Class 2 and 4) income.
UK Inheritance Tax Calculator
Calculate UK Inheritance Tax (IHT) liability based on estate value and thresholds.
UK Mortgage Affordability Calculator
Estimate your maximum mortgage borrowing capacity and affordable monthly repayment in the UK.
UK Stamp Duty Calculator
Calculate your Stamp Duty Land Tax (SDLT) liability for property purchases in the UK.
UK Capital Gains Tax Calculator
Calculate your Capital Gains Tax (CGT) liability for the UK 2024/25 tax year. Includes allowances for residential property and other assets.
UK Take Home Pay Calculator
Calculate your take-home pay after Income Tax and National Insurance deductions for the 2024/2025 tax year.
UK ISA Calculator
Calculate future value of an ISA investment based on contributions, interest/growth rate, and time.
Dividend Tax Calculator
Calculate tax on dividend income in the UK, accounting for the dividend allowance and basic/higher/additional rate tax bands.
EMI Calculator
Calculate your Equated Monthly Instalment (EMI) for home loans, car loans, and personal loans. See total interest payable and payment breakdowns.
Percentage Calculator
Calculate percentages instantly — find X% of Y, what percent X is of Y, percentage change, and percentage increase or decrease.
BMI Calculator
Calculate your Body Mass Index (BMI) based on weight and height. Get your BMI category and understand what it means for your health.
Compound Interest Calculator
Calculate compound interest on your savings or investments. See how your money grows with different compounding frequencies and durations.
Age Calculator
Calculate your exact age in years, months, and days from your date of birth. Find out total days lived and when your next birthday is.
Simple Interest Calculator
Calculate simple interest on principal sums over days, months, or years with visual percentage breakdowns.
SIP Calculator
Estimate the potential wealth growth and future returns of your Systematic Investment Plan (SIP) investments.
Mortgage Calculator
Calculate your comprehensive monthly mortgage payments, including property tax, insurance, and interest.
Refinance Break-Even Calculator
Estimate simple refinance break-even months from actual entered costs and comparable principal-and-interest payment savings.
Debt Payoff Calculator
Compare the avalanche and snowball methods side by side on your own debts. See your debt-free date and what an extra payment really saves.
Debt Consolidation Calculator
Compares a consolidation loan against the debts you have, fee included, and shows when a lower monthly payment quietly costs you more overall.
Credit Card Payoff Calculator
See what paying only the minimum really costs. Models the declining minimum properly, and shows the three-year comparison from your statement.
Loan Eligibility Calculator
Estimate the maximum loan principal and monthly EMI repayment you qualify for based on your income and obligations.
Discount Calculator
Calculate your savings, sale price, and final cost with stackable discounts and sales tax options.
Tip Calculator
Calculate tips easily, split bills among friends, and view shares in real time.
Calorie Calculator
Calculate your daily caloric needs and macronutrient distribution for weight loss, maintenance, or weight gain.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) using Mifflin-St Jeor and Revised Harris-Benedict equations.
Ideal Weight Calculator
Calculate your ideal body weight based on height, gender, and popular medical formulas.
Body Fat Calculator
Estimate your body fat percentage using the US Navy Circumference method and see your fitness category.
GPA Calculator
Determine your semester GPA and track your academic progress instantly.
Fraction Calculator
Perform addition, subtraction, multiplication, and division on fractions. See simplified results and visual pie representations.
Square Root Calculator
Calculate square roots and simplify radicals into the simplest radical form (a√b).
Area Calculator
Calculate the area of geometric shapes like circles, rectangles, triangles, trapezoids, and ellipses dynamically.
Volume Calculator
Calculate the volumes of 3D solids such as spheres, cylinders, cones, cubes, and boxes dynamically.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin, and Rankine, with a visual thermometer display.
Length Converter
Convert measurements between metric and imperial length units with visual real-world comparisons.
Weight Converter
Convert mass and weight measurements between metric and imperial units with fun real-world references.
Speed Distance Time Calculator
Solve for speed, distance, or travel time with automatic conversions and a comparative velocity scale.
Date Difference Calculator
Calculate exact time intervals between two dates or add/subtract time duration to find future or past target dates.
ROI Calculator
Calculate your Return on Investment (ROI) and annualized returns with built-in benchmarks.
Inflation Calculator
Estimate the future cost of goods and the decline of your purchasing power over time due to inflation.
Markup Calculator
Determine selling prices based on product cost and markup percentage, and compare margin vs markup relation.
Margin Calculator
Calculate gross profit margin, revenue/selling price, and equivalent markup percentage instantly.
Break-Even Calculator
Determine the sales volume and revenue required to cover all fixed and variable costs of your business operations.
Salary Calculator
Convert your salary across multiple pay frequencies (hourly, weekly, monthly, annual) and adjust working hour parameters.
Pregnancy Due Date Calculator
Estimate your baby's due date, conception date, gestational age, and trace your progress through each trimester.
Heart Rate Zone Calculator
Calculate your target training heart rate zones using the gold-standard Karvonen method factoring in your resting heart rate.
Water Intake Calculator
Estimate your recommended daily hydration needs based on weight, active exercise, weather climate, and maternal needs.
Sleep Calculator
Wake up refreshed at the end of a sleep cycle to avoid morning fatigue and grogginess.
Macronutrient Calculator
Calculate your daily target macronutrient splits (protein, fats, carbohydrates) based on calorie targets and diet type.
Pythagorean Theorem Calculator
Solve for any missing side of a right-angled triangle using the standard formula a² + b² = c².
Mean Median Mode Calculator
Analyze statistical central tendency, range, sum, count, and sort order of any custom numerical dataset.
Standard Deviation Calculator
Compute sample or population standard deviation, variance, mean, and standard error for statistical datasets.
Permutation & Combination
Calculate combinations and permutations with or without repetition, and learn the differences in order dependency.
Probability Calculator
Analyze probability events: union, intersection, complements, and conditional values with an interactive Venn Diagram.
Exponent Calculator
Compute base numbers raised to standard, decimal, or negative exponents with step-by-step multiplication expansion.
Logarithm Calculator
Compute logarithms for any custom base, natural logarithms (ln), and common base 10 logarithms (log₁₀).
GCD & LCM Calculator
Find the Greatest Common Divisor (GCD) and Least Common Multiple (LCM) for multiple numbers with prime factorization steps.
Volume Converter
Convert liquid and dry volume measurements across metric and imperial systems instantly.
Area Converter
Convert area dimensions across standard metric, land measurement, and imperial systems.
Data Size Converter
Convert digital information storage capacities between Decimal (base-10 KB, MB, GB, TB) and Binary (base-2 KiB, MiB, GiB, TiB) systems.
Energy Converter
Convert energy, heat, and nutrition values across scientific (Joules), mechanical/electrical (kWh, Wh), and thermal (BTU, kcal) scales.
Fuel Cost Calculator
Estimate the total fuel consumption, travel cost, passenger price split, and carbon footprint (CO2 emissions) for your next road trip.
Electricity Bill Calculator
Calculate power consumption, total kilowatt-hours (kWh), and estimated utility charges for standard domestic appliances.
Fixed Deposit (FD) Calculator
Calculate maturity value and interest earned for bank Fixed Deposits with flexible compounding frequencies.
Recurring Deposit (RD) Calculator
Calculate maturity value and interest earned for monthly Recurring Deposits based on quarterly compounding standards.
GST Calculator
Calculate Goods and Services Tax (GST) additions or subtractions with splits for CGST, SGST, and IGST.
Income Tax Calculator
Estimate taxable income, marginal tax slabs liability, effective average tax rate, and take-home pay.
PPF Calculator
Calculate maturity value and tax-free interest growth for your PPF accounts over standard 15-year and extended tenors.
NPS Calculator
Estimate your retirement corpus, immediate tax-free lump-sum withdrawal, and monthly annuity pension income.
Gratuity Calculator
Calculate the gratuity amount payable to employees upon retirement, resignation, or superannuation based on standard labor rules.
EPF Calculator
Estimate your final EPF retirement corpus based on employee/employer shares, salary increments, and monthly interest accrual.
HRA Calculator
Calculate the tax-exempt and taxable portions of your House Rent Allowance (HRA) under standard income tax guidelines.
Protein Intake Calculator
Optimize your daily protein macronutrient target based on body weight, activity level, and fitness goals.
Pace Calculator
Calculate your target pace, total distance, or target time for running, cycling, or triathlons.
Calories Burned Calculator
Calculate physical activity energy expenditure using standard Metabolic Equivalent of Task (MET) ratios.
Smoking Cost Calculator
Calculate the true financial drain of smoking and visualize the immediate health milestones achieved upon quitting.
Surface Area Calculator
Calculate the total surface area of standard geometric 3D shapes with step-by-step formula expansions.
Number System Converter
Convert fractional and integer numeric representations across Binary, Octal, Decimal, and Hexadecimal base radixes.
Roman Numeral Converter
Convert standard numbers to classic Roman Numerals (and vice versa) with mathematical character breakdowns.
Pressure Converter
Convert pressure units across metric, imperial, and atmospheric systems including Pascals, Bars, Psi, and Torr.
Power Converter
Convert mechanical, thermal, and electrical power units including Watts, Kilowatts, Horsepower, and BTU/hr.
Force Converter
Convert mechanical and physical force measurements including Newtons, Kilonewtons, Dynes, and Pound-force.
Angle Converter
Convert angular measurements across degrees, radians, gradians, and turns with an interactive circle quadrant visualizer.
Ohm's Law Calculator
Calculate Voltage, Current, Resistance, or Power based on Ohm's Law with an interactive electrical triangle diagram.
Newton's Second Law Calculator
Calculate Force, Mass, or Acceleration (F = ma) with a dynamic vector arrow and pushing crate physical diagram.
Velocity Calculator
Calculate Average Velocity, Displacement, or Time (v = d / t) with real-world benchmark velocity comparisons.
Acceleration Calculator
Calculate Acceleration, Initial/Final Velocity, or Time (a = delta v / t) with a dynamic velocity-time slope line plot.
Kinetic Energy Calculator
Calculate Kinetic Energy, Mass, or Velocity (KE = 0.5 * m * v^2) with a live rolling ball physics simulation track.
Free Fall Calculator
Calculate the velocity and distance of an object in free fall without air resistance.
Momentum Calculator
Calculate the linear momentum of an object given its mass and velocity.
Work Calculator
Calculate the physical work done by a force over a distance.
Power Calculator
Calculate the mechanical power, representing the rate at which work is done over time.
Centripetal Force Calculator
Calculate the force required to keep an object moving in a circular path.
Friction Calculator
Calculate the force of friction between two surfaces given the normal force and the coefficient of friction.
Torque Calculator
Calculate the torque (rotational force) generated by applying a force at a distance from a pivot point.
Impulse Calculator
Calculate the impulse of a force over time, or the change in momentum of an object.
Terminal Velocity Calculator
Calculate the maximum speed a falling object can reach when air resistance balances gravity.
Elastic Collision Calculator
Calculate the final velocities of two objects after a perfectly elastic 1D collision.
UK Student Loan Repayment Calculator
Calculate monthly student loan repayments based on salary and plan type in the UK.