CalcuHub
Your Everyday Toolkit.
Color Contrast Checker (WCAG)
Check if two colors have enough contrast to be readable.
CSS Gradient Previewer
Create and preview linear or radial CSS gradients.
Harmony Generator
Generate harmonious color palettes from a base color.
HEX ↔ RGB ↔ HSL Converter
Convert colors between HEX, RGB, and HSL formats.
Shade & Tint Generator
Generate a range of shades and tints from a base color.
Area & Perimeter (Shapes)
Calculate the area and perimeter of rectangles, circles, and triangles.
Brick Estimator
Estimate the number of bricks needed for a wall.
Cement/Concrete Calculator
Calculate materials needed for a concrete slab.
Paint Estimator
Estimate the amount of paint needed for your walls.
Steel Weight Calculator
Calculate the weight of steel bars based on dimensions.
Tile Estimator
Estimate the number of tiles needed for a surface area.
Volume of Slab/Cylinder
Calculate the volume of rectangular slabs or cylinders.
Add/Subtract Days
Add or subtract days, months, and years from a date.
Age Calculator
Calculate your age in years, months, and days.
Countdown Timer
Set a timer that counts down to a specific date and time.
Days Between Dates
Calculate the number of days between two dates.
Stopwatch
A simple stopwatch with lap functionality.
Workday Calculator
Calculate the end date after a number of workdays.
Attendance % Tracker
Track your attendance percentage and see how many classes you can miss.
CGPA to Percentage Converter
Convert your CGPA to a percentage based on your university's scale.
Exam Marks Needed
Calculate the marks needed in your final exam to achieve a desired grade.
GPA Calculator (4.0 scale)
Calculate your Grade Point Average (GPA) on a 4.0 scale.
Grade Percentage Calculator
Calculate your overall grade percentage from marks on assignments.
Study Hours Tracker
Log and sum up your study sessions by subject.
Break-even Point
Calculate the point at which total costs and total revenue are equal.
Compound Interest
Calculate the future value of an investment with compound interest.
EMI Calculator
Calculate your Equated Monthly Installment (EMI) for loans.
GST / VAT Calculator
Add or remove Goods and Services Tax (GST) or VAT from an amount.
Profit/Loss Calculator
Calculate the profit or loss from a transaction.
ROI Calculator
Calculate the Return on Investment for your investments.
Simple Interest
Calculate simple interest on a principal amount.
SIP Calculator
Project the future value of your Systematic Investment Plan (SIP).
BMI Calculator
Calculate your Body Mass Index (BMI).
BMR Calculator
Calculate your Basal Metabolic Rate (BMR).
Calorie Burn Estimator
Estimate calories burned during various activities.
Heart Rate Zone Calculator
Calculate your target heart rate zones for exercise.
Ideal Weight (Devine/Broca)
Estimate your ideal weight using popular formulas.
Pregnancy Due Date Estimator
Estimate your pregnancy due date based on LMP or conception date.
Water Intake Calculator
Calculate your recommended daily water intake.
AP/GP Solvers
Solve for terms and sums of Arithmetic and Geometric Progressions.
BODMAS Evaluator
Evaluate mathematical expressions respecting the order of operations.
Exponent/Power Calculator
Calculate the result of a number raised to a power.
Factorial Calculator
Calculate the factorial of a non-negative integer.
LCM / HCF Finder
Find the Least Common Multiple (LCM) and Highest Common Factor (HCF) of two numbers.
Logarithm Solver
Calculate the logarithm of a number to a given base.
Mathematical Constants
Common mathematical constants like Pi and e.
Prime Checker
Check if a number is a prime number.
Quadratic Equation Solver
Find the roots of a quadratic equation.
Base Converter (2–36)
Convert numbers between any two bases from 2 to 36.
Decimal ↔ Binary ↔ Octal ↔ Hex
Convert numbers between the four most common bases.
Ordinal ↔ Cardinal
Convert between cardinal (1, 2) and ordinal (1st, 2nd) numbers.
Roman ↔ Decimal
Convert numbers between Roman numerals and decimal format.
Scientific ↔ Standard Notation
Convert numbers between scientific and standard notation.
Mean, Median, Mode
Calculate the mean, median, and mode of a set of numbers.
Permutations/Combinations
Calculate permutations (nPr) and combinations (nCr).
Probability Calculator
Calculate the probability of single or multiple events.
Standard Deviation
Calculate the standard deviation of a set of numbers.
Z-score Calculator
Calculate the Z-score of a data point.
Distance-Speed-Time
Calculate distance, speed, or time given the other two values.
Fuel Cost Calculator
Estimate the fuel cost for a trip and split it among people.
Luggage Weight Splitter
Distribute item weights across multiple bags to meet allowances.
Trip Budget Splitter
Split trip expenses fairly among a group of people.
Area Converter
Convert between different units of area.
Digital Storage Converter
Convert between bits, bytes, kilobytes, etc.
Fuel Efficiency Converter
Convert between MPG, L/100km, etc.
Length Converter
Convert between different units of length.
Mass Converter
Convert between different units of mass.
Speed Converter
Convert between different units of speed.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Time Converter
Convert between different units of time.
Volume Converter
Convert between different units of volume.