Calculators
Useful calculators for your purposes
Subcategories
🔖Construction and Home
Save time and money on your DIY and construction projects. Our free calculators provide precise esti...
🧩Date and Time
Free online date and time calculators: days between dates, exact age, business days, countdowns, tim...
🧩Food and Cooking
Free online calculators for your kitchen. Accurately convert measurements, scale recipes, calculate...
📋Health calculators
Health calculators. Learn a lot about your body and psyche...
🔖Mathematics
Save time and improve your math skills. Our accurate calculators provide instant results and explana...
🧰Unit Conversion
Powerful and free unit converters for everyday use. Quickly convert between over 100 units of measur...
Services
🛠️180 Days From Today Calculator Half Year Ahead🚀30 Days From Today Calculator Quick Deadline Tool🚀90 Days From Today Calculator Deadline Tracker⚡Acres to Hectares Converter🛠️Age Calculator (How old am I and Exact age in years, months, days)🚀Alcohol Calorie Calculator📈Alcohol Unit Calculator🔧Andropause (Male Hormone) Calculator🛠️Angle Converter🔗Anion Gap Calculator🔗Annuity Calculator - Present and Future Value🤖Anxiety Self-Assessment🔧Arc Length Calculator - Chord Sector Results📈Area Calculator Square Footage Square Meters📝Area Converter⚡Army Body Fat Calculator⚡Arthritis Activity Score🔗Asphalt Pavement Calculator🛠️Astronomical Unit AU Converter📈Atmosphere to PSI Converter🔧Average Mean Calculator - Quick Mean of Any List📝BTU to Joules Converter🤖Baluster Spacing Calculator for Code Compliance📊Bar to Pascal Converter💡Bayes Theorem Calculator - Update Probabilities🔧Binary to Decimal Converter - Base 2 to Base 10🚀Binomial Distribution Calculator - Exact and Approximate📝Biological Age Calculator🤖Bits to Bytes Converter🔗Blood Pressure Calculator📝Blood Sugar Unit Converter📈Board Foot Calculator Lumber Volume🤖Bone Mass Density (BMD) Analyzer🤖Bread Dough Hydration Calculator🔗Breastfeeding Calorie Calculator🛠️Burn Severity Calculator📈Business Days Calculator (Working Days Calculator)📊Butter to Oil Converter (How much oil instead of butter)⚡Buttermilk Substitute Calculator🔧CAGR Calculator - Compound Annual Growth Rate🔧Cabinet Hardware Layout Calculator Pull Placement🤖Cake Serving Calculator (Portions per cake size)🔗Calorie Calculator📊Calories Burned Calculator🔗Calories to Kilojoules Converter📈Canning Calculator (Sterilization time for preserving)🛠️Car Loan Calculator - Auto Finance Made Simple🛠️Carats to Grams Converter🚀Carb-to-Insulin Ratio Calculator🔧Carbohydrate Calculator🔗Carpenters Pythagorean Theorem Calculator for Square Layouts🚀Cartesian Product Calculator - Set Pairings Tool🔧Cartesian to Polar Converter - x y to r Theta🛠️Cat Age Calculator Convert Cat Years to Human Years📊Chili Spice Level Calculator (Heat level calculation)🛠️Cholesterol Ratio Calculator📊Circle Circumference Calculator - Compute 2 pi r Fast🔧Clothing Size Converter🛠️Cocktail Calculator⚡Coffee to Water Ratio Calculator (Pour-over French press)🚀Combination nCr Calculator - Choose Without Order📈Completing the Square Calculator - Step by Step Guide📈Conception Date Calculator🔗Concrete Bags Calculator How Many 60lb 80lb Bags⚡Concrete Tube Calculator Sonotube for Columns🔗Construction Cost Estimator Per Square Foot Meter💡Cooking Time Calculator🚀Corrected Calcium Calculator📝Correlation Coefficient Calculator - Pearson r and r Squared🛠️Cosine Calculator - cos Angle or Adjacent over Hypotenuse⚡Countdown Timer Online Countdown in Hours Minutes Seconds🔗Credit Card Payoff Calculator - Crush Debt Faster📈Cubic Inches to Cubic Centimeters Converter🔗Cubic Meters to Cubic Feet Converter💡Cups to Grams Converter📝Cups to Grams Converter flour sugar butter📈Cups to Milliliters Converter⚡Currency Converter - Manual Exchange Rates Only🔧Data Storage Converter🤖Date Add Calculator Add Days Weeks Months or Years📊Date Calculator (Days Between Two Dates)⚡Date Subtract Calculator Subtract Time from Any Date📝Days Between Dates Calculator🔧Days Since Calculator Track Time Passed Since Any Date🤖Deck Cost Calculator Material Estimator🔗Deep Fryer Calculator (Time and temperature)💡Degrees to Gradians Converter📈Degrees to Radians Converter📈Degrees to Radians Converter - Deg to Rad🔗Density Converter kg per m3 to g per cm3📈Depression Screening Tool📈Determinant Calculator - Fast Matrix Determinants🤖Digital Image Resolution Converter DPI to Pixels🤖Distance Calculator - 2D and 3D Distance💡Division Calculator - Get Quotient and Remainder Fast🔗Dog Age Calculator Convert Dog Years to Human Years🚀Dot Product Calculator - Vector Projection Tool🚀Double Time Calculator Overtime Wage Calculator🤖Double a Recipe Calculator⚡Drywall Calculator Sheets Screws Joint Compound🚀Dyne to Newton Converter📝Egg Boiling Time Calculator (Soft-boiled hard-boiled)⚡Ellipse Calculator - Axes Foci Area🤖Error Function erf Calculator - Fast Approximation📊Espresso Shot Calculator (Coffee-to-water ratio)📈Expected Value Calculator - Weighted Average Tool🚀Exponent Calculator - Powers Roots and Notation Helper🔧Factorial Calculator - n Factorial Fast🔧Factoring Calculator - Factor Polynomials Fast🔧Fahrenheit to Celsius Converter🚀Fahrenheit to Kelvin Converter💡Fat Intake Calculator🚀Feet to Meters Converter📝Fence Cost Calculator Material Posts Concrete🛠️Fence Pickets Calculator🔧Fertility Calculator🤖Fiber Calculator🔧Fibonacci Sequence Calculator - Generate Numbers🚀Fiscal Year Calculator Accounting Year Tool🚀Flooring Calculator Hardwood Laminate Tile Carpet🔧Flour Substitute Calculator📝Flow Rate Converter gallons per minute to liters per second🛠️Foot Pound to Newton Meter Converter🛠️Force Converter⚡Fraction Calculator - Add Subtract Multiply Divide with Steps📝Fraction to Decimal Converter - Clean and Precise Conversion📝French Drain Calculator Gravel Pipe Trench Size🔗Fresh Herbs to Dried Converter📈Fuel Consumption Converter mpg to L per 100km🤖GPA Calculator - Grade Point Average Made Easy🔗Gallons to Liters Converter US and UK📝Gamma Function Calculator - Generalized Factorial🔧Gigabytes to Terabytes Converter⚡Glasgow Coma Scale Calculator📝Glomerular Filtration Rate (GFR) Calculator📈Glycemic Load Calculator🤖Gradient Calculator Slope as a Percentage🔗Grams to Cups Converter🤖Graph Theory Calculator - Paths Degrees Components🚀Gravel Calculator Cubic Yards Tons🤖Greatest Common Factor GCF Calculator - Find GCD Instantly📝Grocery Budget Calculator⚡Half a Recipe Calculator🛠️HbA1c to Average Glucose Calculator🤖Health & Fitness Calculator Suite💡Heart Rate Zone Calculator🔗Hectares to Acres Converter🔗Height Converter📈Histogram Maker - Build Quick Charts with SVG⚡Homebrew Calculator (Brewing calculator)🛠️Hours to Days Converter📝Hydration Calculator (Daily water intake)📈IRR Internal Rate of Return Calculator - Project Hurdle Rate📈Inch of Mercury to Millibar Converter🔗Instant Percentage Calculator🔗Insulin Dose Calculator🔗Inverse Cosine arccos Calculator - Value to Angle📈Inverse Sine arcsin Calculator - Value to Angle💡Inverse Tangent arctan Calculator - Value to Angle📝Joules to Calories Converter📊Kelvin to Celsius Converter🛠️Kilograms to Pounds Converter📝Kilometers per Hour to Miles per Hour Converter💡Kilowatt Hour to Joule Converter📊Kilowatts to Horsepower Converter📈LED Lighting Savings Calculator vs Incandescent📈Labor Cost Calculator Man Hours Rates🔧Law of Cosines Calculator - Side and Angle Finder🤖Lean Body Mass Calculator🔧Least Common Multiple LCM Calculator - Fast Multiple Finder🛠️Leftover Calculator (What to cook with leftovers)📈Length Converter🔗Life Span Calculator Days Weeks and Estimated Heartbeats Lived🛠️Light Year Converter to Kilometers and Miles📊Lighting Calculator Lumens for Room Size🤖Linear Equation Calculator - Solve ax plus b equals c🔧Linear Programming Calculator - Simplex Style Helper⚡Linear Regression Calculator - Best Fit Line and r Squared📊Liters to Gallons Converter🔧Liters to Gallons Converter US and UK💡Logic Gate Calculator - AND OR NOT XOR NAND NOR🚀MELD Score Calculator (Liver Disease)💡METs Calculator (Metabolic Equivalents)🔧Mach to Miles per Hour Converter🛠️Marinating Time Calculator📝Mean Arterial Pressure (MAP) Calculator💡Mean Median Mode Calculator - Central Tendency Finder📊Megabits to Megabytes Converter internet speed🔗Megabytes to Gigabytes Converter🚀Metabolic Health Dashboard📊Meters per Second to Kilometers per Hour Converter🔗Metric Tons to US Tons Converter🚀Metric to Imperial Converter📊Microns to Millimeters Converter📈Midpoint Calculator - Point Between Two Points🔧Miles per Hour to Kilometers per Hour Converter💡Miles to Kilometers Converter🚀Military Time Converter 24 Hour and 12 Hour Clock📊Milliliters to Fluid Ounces Converter🔧Milliliters to Ounces Converter🔗Moment of Inertia Converter🔗Month Progress Calculator Track Current Month Progress⚡Multiple Dish Timer🔗Nautical Miles to Kilometers Converter💡Net Present Value NPV Calculator - Cash Flow Valuation⚡Newton to Pound Force Converter🚀Nicotine Dependency Test🚀Number Base Converter - Binary Decimal Hex Octal📝Nutrition Profile Calculator📊Nutritional Value Per Serving Calculator🔗Octal Calculator - Base 8 Math📊One Year From Today Calculator Annual Deadline Tool🔧One-Rep Max Calculator🛠️Ounces to Grams Converter💡Ovulation Calculator🤖Oxygen Flow Rate Calculator🛠️PSI to Bar Converter⚡Paint Calculator Gallons Liters for Walls Ceilings🔧Parsec Converter🤖Party Food Calculator (How much food for N guests)🚀Pascal to PSI Converter⚡Pasta Cooking Timer📊Paver Calculator How Many Bricks or Pavers Needed🚀Percentage Error Calculator - Measurement Accuracy📊Permutation and Combination Calculator - nPr and nCr in One💡Permutation nPr Calculator - Arrange With Order💡Pizza Calculator (Which pizza size is better value Area calculation)🚀Poisson Distribution Calculator - Rare Event Model🛠️Pounds to Kilograms Converter🔧Power Converter🔧Pressure Converter🛠️Prime Number Calculator - Test or Factor Quickly📝Probability Calculator - Events Conditional and Independent🔧Project Timeline Calculator End Date Planner🤖Protein Intake Calculator📊Pythagorean Theorem Calculator - a Squared plus b Squared💡Pythagorean Theorem Helper - Hypotenuse Solver Online⚡Quadratic Formula Calculator - Roots and Full Steps🔗R Value Calculator Insulation Effectiveness📊Race Time Predictor🔧Radians to Degrees Converter🔗Radians to Degrees Converter - Rad to Deg📊Radiation Converter sievert to rem📊Recipe Scaler (Portion size calculator)📊Recipe Unit Converter (Any unit conversion in recipes)🛠️Rectangle Calculator - Area Perimeter Diagonal🔗Relative Error Calculator - Compare to True Value🛠️Remainder Calculator - Quick Mod and Remainder Finder🤖Resting Heart Rate Calculator⚡Retirement Date Calculator Estimate Retirement Timeline📈Right Triangle Calculator - Trig and Area in Seconds💡Roast Cooking Time Calculator💡Roman Numeral Converter - To and From Arabic🚀Roof Replacement Cost Calculator💡Roof Truss Calculator🚀Roofing Shingle Calculator Squares Bundles🔗Salary Calculator - Hourly to Annual Pay📊Salary Calculator Convert Hourly to Annual Pay🚀Sales Tax Calculator - Add or Remove Tax⚡Sand Calculator🛠️Scatter Plot Generator - Visualize Correlations Fast🛠️Scientific Calculator - Advanced Math Functions📝Seconds to Minutes Converter🤖Sector Area Calculator - Circle Slice Made Easy🛠️Septic Tank Size Calculator💡Sequence Calculator - Define and Evaluate Terms⚡Set Operations Calculator - Union Intersection Difference🤖Simple Interest Calculator - Quick Interest Math🛠️Sleep Quality Calculator🚀Smart Thermostat Savings Calculator🤖Sodium (Salt) Intake Calculator📈Sous Vide Time & Temperature Calculator📊Spanish Customary Units Converter vara legua and more🔧Speed Converter🚀Square Calculator - Area Perimeter Diagonal🔧Square Feet to Square Meters Converter📝Square Meters to Square Feet Converter📈Square Miles to Square Kilometers Converter🔗Square Root Calculator - Perfect and Approximate Roots📊Stair Railing and Spindle Calculator⚡Standard Error Calculator - SE for Mean Proportion🔗Steps to Calories Converter📝Stones to Pounds Converter💡Stopwatch Online Stopwatch Timer📝Stress Level Calculator🤖Sugar Intake Calculator🔧Sugar Substitute Calculator🚀Sum of Squares Calculator - Formula and Worked Example🔧Surface Area Calculator - 3D Shapes Explained🔧Sushi Rice Calculator (Rice and vinegar ratios)🚀Sweet Tea Ratio Calculator (Tea-to-sugar ratio)📈System of Equations Calculator - 2x2 and 3x3 Solvers📈TDEE Calculator (Total Daily Energy Expenditure)📈Tablespoons to Teaspoons Converter💡Tangent Calculator - tan Angle or Opposite over Adjacent⚡Teaspoons to Milliliters Converter🔧Temperature Conversion (F to C)📝Temperature Converter🔧Tenure Calculator Employment Length Tool🔧Text to Time Calculator Convert Natural Language to Time📊Time Add Calculator Add Hours Minutes or Seconds📈Time Calculator - Add and Subtract Times⚡Time Duration Calculator (Hours, Minutes, Seconds between two times)🔗Time Subtract Calculator Subtract Hours Minutes or Seconds📝Time Unit Converter Convert Years Days Hours Minutes Seconds📊Time and a Half Calculator Overtime Pay Estimator📈Timezone Difference Calculator Hours Between Two Zones💡Tip Calculator - Split the Bill Smartly🛠️Topsoil Calculator📊Torque Converter Newton Meter to Foot Pound💡Torr to Pascal Converter🔧Training Load Calculator🛠️Tree Height Calculator Using Trigonometry🛠️Triangle Calculator - Solve Sides Angles Area🔧Trigonometry Calculator - Sine Cosine Tangent Toolkit📈Turkey Cooking Time Calculator (By weight)🔗Unit Circle Calculator - Exact Values and Coordinates🤖Variance Calculator - Measure of Spread🔧Vertex Form Calculator - Convert and Analyze Parabolas🚀Viscosity Converter📝Volume Calculator - Prisms Cylinders Spheres and More⚡Volume Converter💡Waist-to-Hip Ratio Calculator📊Wall Area Calculator for Painting or Siding📈Water Heater Size Calculator Gallons Recovery Rate🛠️Water Intake Calculator💡Watts to BTU per Hour Converter🔧Week Number Calculator Find ISO Week of the Year📈Weeks to Months Converter🤖Weight Converter💡Weight Unit Converter📊Wellness Assessment Toolkit🔗Work Hours Calculator Total Time Worked Minus Breaks📝Yards to Meters Converter🔗Year Progress Calculator Percentage of the Year Completed📈Yeast Converter (Dry vs. fresh yeast)💡Z Score Calculator - Standardize Any Value