All 101 Free Online Tools
Browse our complete collection of free browser-based tools. No signup, no downloads.
Free Online Free Age Calculator
Calculate your exact age in years, months, and days. Find your zodiac sign, Chinese zodiac, generati
Free Online Alarm Clock - Set Alarms in Browser
Set an alarm online in your browser. Choose your alarm time and get notified. Free alarm clock with
Auto Loan Calculator - Free Car Payment Calculator
Calculate your monthly car payment, total interest, and loan cost. Free auto loan calculator with am
Average Calculator - Mean, Median, Mode
Free online average calculator. Calculate mean, median, mode, range, sum, and standard deviation fro
Blood Alcohol Calculator (BAC) - Free Online Tool
Estimate your blood alcohol content based on drinks, weight, gender, and time No signup required, wo
Free Online BMI Calculator
Calculate your Body Mass Index (BMI) with height and weight. Supports metric and imperial units. See
Body Fat Calculator - Free Online Tool
Free online Body Fat Calculator. Fast, accurate, no signup required. Use our Body Fat Calculator too
Break-Even Calculator - GoCalc
Calculate your break-even point instantly. Find how many units you need to sell to cover costs.
Free Calorie Calculator
Calculate daily calorie needs based on age, weight, height, and activity level No signup required, w
Calorie Deficit Calculator - Free Online Tool
Calculate your daily calorie deficit for weight loss goals based on your TDEE and target weight.
Cat Age Calculator - Free Online Tool
Cat Age Calculator - Free online tool. No signup required. Fast, private, works in your browser.
Free Online Chronological Age Calculator
Calculate your exact chronological age in years, months, days, hours, and minutes from your date of
Color Code Converter - Free Online Tool
Color Code Converter - Free online tool. No signup required. Works in your browser.
Free Online Compound Interest Calculator
Calculate compound interest with regular contributions. See how your investment grows over time. Fre
Free Compound Interest Calculator - Investment Growth
Calculate compound interest with custom compounding frequency. See future value, total interest earn
Concrete Calculator - Free Online Tool
Calculate how much concrete you need for slabs, footings, and columns. Bags and cubic yards.
Free Unit Conversion Calculator - Length, Weight, Volume,...
Convert between units of length, weight, volume, and temperature. Free online unit conversion calcul
Cooking Unit Converter - Free Online Tool
Cooking Unit Converter - Free online tool. No signup required. Works in your browser.
Cooking Measurement Converter - Kitchen Unit Calculator
Free cooking measurement converter. Convert between cups, tablespoons, teaspoons, milliliters, liter
Free Online CPM Calculator - Ad Cost & Impressions
Calculate CPM (Cost Per Mille), total advertising cost, and impressions for your campaigns. Free CPM
Free Online Cumulative GPA Calculator
Calculate your cumulative GPA across multiple semesters. Add courses with grades and credits, includ
Data Storage Converter - Free Online Tool
Data Storage Converter - Free online tool. No signup required. Works in your browser.
Free Online Free Date Calculator
Calculate days between dates, add or subtract days from a date No signup required, works directly in
Free Date Difference Calculator
Calculate the difference between two dates in days, weeks, months, and years No signup required, wor
Date Duration Calculator - Free Online Tool
Date Duration Calculator - Free online tool. No signup required. Works in your browser.
Days Calculator - Days Between Dates
Calculate the number of days between two dates or find a date X days from now or ago. Free online da
Debt Payoff Calculator - Free Online Tool
Free online Debt Payoff Calculator. Fast, accurate, no signup required. Use our Debt Payoff Calculat
Free Discount Calculator
Calculate discounts and sale prices. See how much you save No signup required, works directly in you
Dog Age Calculator - Free Online Tool
Dog Age Calculator - Free online tool. No signup required. Fast, private, works in your browser.
Down Payment Calculator - GoCalc
Calculate the down payment needed for a home purchase. See how different percentages affect your mor
Free Due Date Calculator
Calculate your pregnancy due date using your last menstrual period or conception date. See current w
Free Electricity Cost Calculator
Calculate electricity costs. Enter wattage, hours, and rate No signup required, works directly in yo
Electricity Cost Calculator - Free Online Tool
Calculate electricity costs for appliances based on wattage, usage hours, and rates.
Free Online Equation Solver - Linear & Quadratic
Solve linear and quadratic equations instantly. Get real or complex solutions with discriminant anal
Fraction Calculator - Add, Subtract, Multiply, Divide Fra...
Free online fraction calculator. Add, subtract, multiply, and divide fractions with step-by-step sol
Free Fuel Cost Calculator
Calculate fuel costs for your trip. Enter distance, fuel efficiency, and price No signup required, w
Free Fuel Cost Calculator
Calculate fuel costs for your trip. Enter distance, fuel efficiency, and gas price.
Free Online Free GPA Calculator
Calculate your GPA from grades. Add courses with credits and grades No signup required, works direct
Free Grade Calculator
Calculate your weighted grade average and letter grade. Add assignments with scores and weights to s
Heart Rate Zone Calculator - go-calc.com
Calculate your target heart rate zones for exercise No signup required, works directly in your brows
Hours Calculator - Calculate Hours Worked
Calculate hours worked between start and end times. Support for breaks and weekly timesheet. Free on
Free Ideal Weight Calculator
Calculate your ideal body weight based on height, gender, and multiple medical formulas.
Free Online Inflation Calculator
Calculate the impact of inflation on purchasing power over time. See equivalent amounts, total infla
Interest Rate Calculator - Free Online Tool
Interest Rate Calculator - Free online tool. No signup required. Works in your browser.
Free Investment Calculator - Compound Interest
Calculate investment growth with compound interest and monthly contributions. See future value, tota
Free Online IVF Due Date Calculator
Calculate your IVF pregnancy due date based on transfer type, egg retrieval, or IUI date. See gestat
Free LCM & GCD Calculator
Calculate Least Common Multiple (LCM) and Greatest Common Divisor (GCD) of two or more numbers.
Free Online Free Loan Calculator
Calculate monthly payments, total interest, and amortization for any loan No signup required, works
Love Calculator - Name Compatibility Test
Free love calculator! Enter two names and discover your love compatibility percentage. Fun name-base
Macro Calculator - Free Macronutrient Calculator
Calculate your daily protein, carbs, and fat intake based on your goals. Free macro calculator for w
Macro Tracker Calculator - Free Online Macro Tracker Calc...
Calculate your daily macronutrient needs based on your goals, weight, and activity level. Free onlin
Free Markup Calculator - Margin & Profit
Calculate markup percentage, profit margin, selling price, and profit from cost price. Free markup v
Free Matrix Calculator - Add, Multiply, Determinant
Add, subtract, multiply matrices online. Calculate determinant and transpose. Free matrix calculator
Free Mortgage Calculator
Calculate monthly mortgage payments, total interest, and amortization schedule. Free mortgage calcul
Free Mortgage Payoff Calculator - Extra Payment Savings
Calculate how much you can save by making extra mortgage payments. See your payoff date, total inter
Free Overtime Calculator - Regular & OT Pay
Calculate your overtime pay with custom OT multipliers (1.5x, 2x). See regular pay, overtime pay, an
Free Ovulation Calculator - Fertile Window
Estimate your ovulation date and fertile window based on your menstrual cycle. Track cycle days and
Free Running Pace Calculator
Calculate running pace, time, or distance. Perfect for runners and joggers No signup required, works
Paint Calculator - Free Online Tool
Paint Calculator - Free online tool. No signup required No signup required, works directly in your b
Free Paycheck Calculator - Gross to Net Pay
Calculate your take-home pay after federal tax, state tax, and FICA deductions. Free paycheck calcul
Free Percentage Calculator
Calculate percentages easily. What is X% of Y? X is what % of Y? Percentage change.
Free Online Pomodoro Timer - Focus & Productivity
Free Pomodoro timer with customizable work and break intervals. 25-minute focus sessions with 5-minu
Pregnancy Due Date Calculator - Free Online Tool
Calculate your pregnancy due date based on last menstrual period or conception date. Track weeks and
Pregnancy Due Date Calculator - Free Online Tool
Estimate your baby's due date based on your last menstrual period (LMP) or conception date.
Free Prime Number Checker
Check if any number is prime instantly. Find prime factors, see nearby primes, and explore number pr
Free Probability Calculator
Calculate probability of single and multiple events. Includes combinations and permutations.
Profit Margin Calculator - GoCalc
Calculate gross and net profit margins. Essential tool for business owners and entrepreneurs.
Free Protein Calculator
Calculate your daily protein needs based on weight, activity level, and fitness goals.
Free Random Number Generator
Generate random numbers within a range. Single or multiple random numbers No signup required, works
Random Number Generator - Free Online Tool
Random Number Generator - Free online tool. No signup required No signup required, works directly in
Rent vs Buy Calculator - Free Online Tool
Free online Rent vs Buy Calculator. Fast, accurate, no signup required. Use our Rent vs Buy Calculat
Free Retirement Savings Calculator
Plan your retirement savings. Calculate how much you need and projected growth. Free retirement calc
Free Online ROI Calculator - GoCalc
Calculate return on investment (ROI) with this free online calculator. Enter investment cost and gai
Free Online Salary Calculator - Hourly to Annual
Convert between hourly, daily, weekly, biweekly, monthly, and annual salary. Free salary and wage ca
Free Sales Tax Calculator
Calculate sales tax for any purchase. Enter price and tax rate to get total cost instantly.
Savings Calculator - Compound Interest Growth
Calculate savings growth with compound interest. See how your money grows with regular deposits over
Free Online Scientific Calculator
Full-featured scientific calculator with trigonometry, logarithms, exponents, and more. Free online
Scientific Notation Converter - Free Online Tool
Scientific Notation Converter - Free online tool. No signup required. Works in your browser.
Shoe Size Converter - Free Online Tool
Shoe Size Converter - Free online tool. No signup required. Works in your browser.
Sleep Calculator - Find Your Ideal Bedtime
Calculate the best time to go to sleep or wake up based on 90-minute sleep cycles. Get optimal bedti
Speed Calculator - Free Online Tool
Speed Calculator - Free online tool. No signup required No signup required, works directly in your b
Speed Unit Converter - Free Online Tool
Speed Unit Converter - Free online tool. No signup required No signup required, works directly in yo
Free Speed Distance Time Calculator
Calculate speed, distance, or time from any two values. Supports mph, km/h, m/s. Free physics calcul
Square Footage Calculator - Room Area
Calculate square footage for rooms and spaces. Supports rectangle, circle, triangle, and L-shaped ar
Free Standard Deviation Calculator
Calculate standard deviation, mean, variance, median, and range from a set of numbers.
Free Stock Return Calculator
Calculate stock investment returns including dividends, total gain, and annualized return.
Free Online Stopwatch
Free online stopwatch with lap times. Accurate to milliseconds. No download needed.
Free Subnet Calculator - IP Address & CIDR
Calculate network address, broadcast address, usable hosts, and wildcard mask from IP address and CI
Free Sales Tax Calculator
Calculate sales tax, total price with tax, or extract tax from any amount. Free online tax calculato
TDEE Calculator - Total Daily Energy Expenditure
Calculate your Total Daily Energy Expenditure (TDEE) based on age, weight, height, and activity leve
Free Online Free Time Calculator
Add or subtract hours, minutes, and seconds. Calculate time differences No signup required, works di
Free Time Zone Converter - World Clock
Convert time between time zones instantly. See current time in major cities worldwide. Free online t
Free Online Tip Calculator - Split Bill
Calculate tip amount and split the bill between people. Free tip calculator with custom tip percenta
Tire Size Calculator - Calculate Tire Dimensions
Free tire size calculator. Enter tire code (e.g., 225/45R17) to calculate diameter, circumference, s
Free Online Free Unit Converter
Convert between common units. Length, weight, temperature, volume, and speed No signup required, wor
Unit Price Calculator - Compare Prices
Calculate and compare unit prices to find the best deal. Free price per unit calculator for shopping
VO2 Max Calculator - go-calc.com
Estimate your VO2 max using the Cooper test or other methods No signup required, works directly in y
Voltage Calculator (Ohms Law) - Free Online Tool
Voltage Calculator (Ohms Law) - Free online tool. No signup required No signup required, works direc
Water Intake Calculator - Free Online Tool
Calculate your daily recommended water intake based on weight, activity, and climate.
Weight Unit Converter - Free Online Tool
Weight Unit Converter - Free online tool. No signup required No signup required, works directly in y
Free Online World Clock - Time Zones Worldwide
See current time in major cities worldwide. Compare time zones, add custom cities, and track multipl