24 Free Online Tools

Online Calculators

Free online calculators for percentages, finance, dates, health, mathematics and everyday calculations.

Free to Use No Sign-Up Browser-Based

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All Online Calculators

24 tools

Age Calculator

Calculate Age & Give Important Info About Your Age

Between Dates Calculator

Calculate Days, Weeks, Months etc between two dates.

BMI Calculator

Body mass index (BMI) is a measure of body fat based on height and weight that applies to adult men and women.

Profit Calculator

Calculate Your Profit in Future

Interest Calculator

Calculate Interest on Amount overtime.

GPA Calculator

Easy To Use GPA Calculator Tool

Scientific Calculator

Scientific Calculator with double-digit precision that supports both button click and keyboard type.

Currency Converter

Simple Currency Converter Tool

Random Number Generator

Generate numbers randomly with constraints.

Percentage Calculator

Calculate percentages, percentage increases, and percentage decreases instantly with this versatile mathematical tool.

Loan (EMI) Calculator

Calculate Equated Monthly Installments (EMI) for any loan with detailed interest and total payment breakdowns.

Sales Tax / GST Calculator

Quickly calculate the total price including tax or extract the tax amount from a gross total.

Binary Operations Calculator

Perform arithmetic operations on binary numbers (Add, Subtract, Multiply, Divide) with instant conversion to decimal and hex.

Password Entropy Calculator

Measure the mathematical strength of your passwords using bit entropy to determine how resistant they are to brute-force attacks.

Standard Deviation Calculator

Calculate the sample and population standard deviation, variance, and mean for a set of numbers.

Decimal to Fraction Calculator

Convert any decimal number into its simplest fraction form, including mixed numbers and improper fractions.

Calorie (BMR) Calculator

Estimate your daily calorie needs based on your Basal Metabolic Rate (BMR) and activity level using the Mifflin-St Jeor equation.

Tip Calculator

Quickly calculate tips and split bills among friends with real-time per-person breakdowns.

Time Duration Calculator

Calculate the exact time difference between two dates and times with detailed breakdowns.

Aspect Ratio Calculator

Calculate the aspect ratio of any image or video, or scale dimensions while maintaining a fixed ratio.

Ohm's Law Calculator

Calculate Voltage, Current, Resistance, and Power instantly by entering any two known values.

Macronutrient Calculator

Break down your daily calorie goal into Protein, Carbohydrates, and Fats based on your fitness goals.

Electricity Cost Calculator

Calculate the estimated cost of running any household appliance based on its wattage and your local energy rates.

Pet Real Age Calculator

Calculate your pet's equivalent human age using scientifically-backed aging curves for dogs and cats.

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