All Online Tools (37)
Complete collection of verified, self-contained calculators and utilities.
Percentage Calculator
Calculate percentages, percentage change, and what percentage one number is of another with instant results.
Loan Calculator
Calculate monthly loan payments, total interest, and total repayment using standard amortization equations.
Discount Calculator
Calculate the final discounted price and exact monetary savings for sales, clearance items, and coupons.
Compound Interest Calculator
Project the exponential growth of savings and investments over time with flexible compounding frequencies.
Simple Interest Calculator
Compute linear interest on short-term loans, promissory notes, and fixed-deposit savings balances.
Mortgage Calculator
Estimate monthly home loan payments including principal, interest, property taxes, and homeowners insurance.
Profit Margin Calculator
Calculate gross profit, profit margin percentage, and corresponding markup from cost and selling revenue.
Markup Calculator
Determine the optimal selling price and resulting profit margin by applying a target markup percentage to cost.
Fraction Calculator
Add, subtract, multiply, and divide proper, improper, and mixed fractions with automatic simplification.
Average Calculator
Calculate the arithmetic mean, median, mode, range, and total sum for any list of numbers.
Ratio Calculator
Simplify ratios to simplest form or solve for unknown values in proportions (A : B = C : D).
Scientific Calculator
Evaluate complex mathematical expressions with support for trigonometry, logarithms, square roots, and powers.
BMI Calculator
Calculate Body Mass Index (BMI) in metric or imperial units and determine your healthy weight range.
BMR Calculator
Estimate your Basal Metabolic Rate (BMR) and daily caloric needs using the Mifflin-St Jeor formula.
Age Calculator
Calculate exact chronological age in years, months, days, total days lived, and countdown to your next birthday.
Date Difference Calculator
Calculate the exact number of days, business days, weeks, and months between two calendar dates.
Add or Subtract Days
Add or subtract days, weeks, months, or years from any starting date to determine a deadline or past event.
Time Duration Calculator
Calculate hours, minutes, and seconds between two clock times, including overnight intervals.
Length Converter
Convert distances and lengths between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles.
Weight Converter
Convert weight and mass between kilograms, grams, milligrams, pounds, ounces, stones, and metric tons.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin with step-by-step conversion formulas.
Area Converter
Convert surface areas between square meters, square feet, square yards, acres, and hectares.
Volume Converter
Convert liquid and volumetric capacities between liters, milliliters, US gallons, quarts, pints, cups, and fluid ounces.
Speed Converter
Convert velocity between kilometers per hour (km/h), miles per hour (mph), meters per second (m/s), and knots.
Data Storage Converter
Convert digital storage sizes across Bytes, KB, MB, GB, TB, and PB in both Decimal (1000) and Binary (1024) standards.
Word & Character Counter
Analyze word count, character count (with/without spaces), sentences, paragraphs, and estimated reading time in real-time.
Case Converter
Transform text case instantly into UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case, and kebab-case.
Text Cleaner & Formatter
Clean messy text by stripping extra spaces, removing blank lines, trimming margins, deleting duplicates, and stripping HTML.
Tip & Split Bill Calculator
Calculate restaurant tips, total bill with tip, and split the final cost evenly among any number of people.
Password Generator
Create strong, cryptographically secure random passwords using client-side CSPRNG with customizable length and characters.
Calorie Deficit Calculator
Calculate your Basal Metabolic Rate (BMR), Total Daily Energy Expenditure (TDEE), and optimal calorie deficit for steady, healthy fat loss.
Business Days Calculator
Calculate the exact number of working days between two dates, or add/subtract business days excluding weekends and custom public holidays.
Percentage Increase Calculator
Calculate percentage increase, percentage decrease, and percentage change between two numbers, or apply a percentage increase or decrease to any value.
Credit Card Payoff Calculator
Calculate how long it will take to pay off your credit card balance, total interest charges, and how much faster you can become debt-free with fixed or extra monthly payments.
Sales Tax Calculator
Calculate sales tax on any purchase, find the gross total price, or calculate backwards to extract the net pre-tax amount and tax portion from a tax-inclusive total.
Savings Goal Calculator
Find out exactly how much you need to save each month to reach your financial savings goal by your target date, including compounding interest and investment return.
Body Fat Calculator
Estimate your body fat percentage, fat mass, lean mass, and healthy fitness category using the standardized US Navy circumference tape-measure method.